TWI351806B - High step-up isolated converter with two input pow - Google Patents

Description

1351806 IX. INSTRUCTIONS OF THE INVENTION: TECHNICAL FIELD The technical field of the present invention includes the scope of power electronics, DC/DC power converters, and clean energy technologies, although the technical field involved in the present invention is extensive, but mainly The development of "high-boost isolated dual-input power converter" can input two low-voltage DC power supplies of different voltages, and simultaneously convert them into stable high-voltage DC power supply output, and has the function of two-way power transmission to improve energy utilization and increase φ Power supply stability. [Prior Art] In the past 100 years, human science and technology have been growing rapidly, and production technology has been continuously improved. It has significantly improved the daily life, but the growth of the global population has accompanied the problem of energy use. During the nineteenth century, oil was an important fuel for the emergence of industrial society. In the early twentieth century, oil replaced coal as the most important energy source in modern times. However, the world's oil production was controlled by several major oil-producing countries. The second oil crisis that erupted in 1973 and in 1979 has had a huge impact on the world. In recent years, oil prices have continued to rise and the stock of oil is rapidly declining. Experts estimate that there will be a supply crisis in the next half century. In the next few years, high oil prices are foreseeable, so the prices are low and abundant. The coal gradually recovered its importance. At present, the most used coal is fuel and coal used in power plants, followed by coking coal into coke for use in the steel industry. In addition, coal can also be used to produce steam 9 1351806 oil, benzene, asphalt and synthetic rubber. And other important products or by-products. However, when coal and water are mixed, acidic substances will be produced. If it penetrates into the soil, it will pollute nearby rivers or lakes. The carbon dioxide, sulfur dioxide and ash particles generated after coal combustion will seriously pollute the air. Therefore, environmental pollution is caused by the use of coal mines. The main drawback. In response to the global greenhouse effect of carbon dioxide, countries around the world signed the "Kyoto Protocol" in the Third Conference of States Parties held in Kyoto, Japan in 1997 to regulate the amount of greenhouse gases emitted by humans, and officially in early 2005. Effective. In order to achieve greenhouse gas reduction, the domestic initial research on nuclear power generation to curb carbon dioxide emissions, however, nuclear power generation safety concerns and pollution issues, there are many disputes in its application. In order to improve the gradual reduction of non-renewable energy capacity and the problems reflected by the greenhouse effect, in addition to reducing the waste of existing energy use, the development of new-energy is an urgent task. Generally, new energy has little impact on the environment, and the pollution caused by air, water or waste is less significant. More importantly, such energy development can be repeated. It has sustainable development characteristics and clean energy. (Clean Energy) is a new energy source that is valued for sustainable use [1]-[2]. However, some clean energy sources have low energy density and are susceptible to seasonal changes or geographical environment. Power electronics and monitoring technology are related to the competitiveness of various electrical products and cost, and the balance between energy conservation and environmental protection. Therefore, it is regarded as another important key to the 21st century industry after information technology. technology. Clean energy energy output characteristics are not fixed due to power generation characteristics, and it is easy to float with negative 1351806 load, or its power generation is subject to changes in natural environment. For continuous power supply demand, power supply quality is extremely unstable. In general, clean energy cannot be directly applied to general electrical products. Therefore, DC/DC power converters developed in the field of power electronics [3], [4] are indispensable power devices for applying clean energy. Some clean energy does not have the function of energy storage. When clean energy is applied to decentralized power generation systems or hybrid electric vehicle power systems, batteries or super capacitors are generally used as power storage devices [5], [6], to mix # The integrated power supply mode achieves continuous and stable output power supply, but needs to use additional traditional power converters and chargers or single bidirectional converters [7] one [9] to meet the power supply and charging requirements of the power storage device, and also add additional systems. Erection costs. In addition to the use of traditional power converters and chargers in power storage devices, in recent years, many experts and scholars have invested in the study of two-way converters in order to achieve the goal of reducing the number of converter devices, simplifying complex power supply systems and reducing system costs. A boost converter that replaces the output diode with the output high voltage in series with a power semiconductor switch can be considered as a bidirectional step-up/step-down converter [7] 'Reference [8] and develops with this architecture Bidirectional step-up/step-down converter with flexible switching mechanism. This architecture can realize the function of charging the power storage device in the power supply mode and the magic mode when the bidirectional converter is boosted, but an additional converter device is required. It does not have the characteristics of high rise/down ratio, and it also needs to connect the battery or super capacitor to the input of higher voltage to meet the demand of high voltage DC output voltage. For the purpose of achieving two-way transmission of power, there are also experts. Scholars proposed 1351806 to replace the latter four rectifier diodes with a full-bridge converter architecture for power semiconductor switches [9] With the phase shift (Phase Shift) technology of the drive signal or the active voltage clamp technology [1〇], [11], overcoming the voltage surge problem on the switch caused by the leakage inductance of the transformer, the switching zero voltage and zero current flexible switching can be achieved. In order to reduce switching loss and further improve efficiency, the DC output voltage can be increased by the transformer turns ratio to achieve high boost ratio, electrical isolation, and high voltage side and low side switch withstand voltage and current resistance matching. Turn-on loss, but this practice • An additional converter unit is still required. In order to reduce the use of components, reference [12] achieves high boost ratio and high-voltage side and low-side switch withstand voltage and current resistance matching with only three switches and coupled inductor architecture, and can be converted into high-efficiency power conversion, but In clean energy high-power applications, it is usually necessary to electrically isolate the low-voltage side from the high-voltage side to protect the power supply end. The coupled inductor structure does not have electrical isolation characteristics, and the use of this architecture in the case of dual power input requires an additional one. Group converter. # In order to further simplify the system and reduce the system setup cost, experts and scholars have developed a converter architecture that satisfies the dual power supply input and power supply bidirectional transmission function with a single power converter [13], [14], in reference [13], The three-winding coupled inductor architecture achieves dual power supply input and power supply bidirectional transmission, and has high boost ratio and high efficiency conversion characteristics, but the charging energy of the power storage device can only be provided by another input power source, but not by the output high voltage. Side feedback, and it does not have electrical isolation characteristics, can not be applied to the occasion of electrical isolation requirements; reference [14] based on the dual 12 1351806 to the step-up / step-down converter 'developed two-way power supply circuit in series two-way Dual power input power converter, when the two power supplies are simultaneously powered, the conduction loss can be greatly reduced, and the input current of the two power supplies is continuous. For the clean energy source applied to the input power supply with low voltage and high current, the architecture can be effectively improved. Efficiency, but this architecture boost ratio is limited by the traditional two-way up/down converter architecture and is not electrically isolated. In addition, all switches must withstand the input high current and output high voltage. For the current selection of the switch selection, it is impossible to select the low-voltage low-on-resistance semiconductor switch, which is easy to cause additional conduction loss. In view of the above, the high-boost isolated dual-input power converter of the present invention introduces a transformer and an active box circuit architecture to overcome the above disadvantages, and the developed converter has a high step-up ratio, electrical isolation, dual input power supply, The power storage device charges energy to another power supply or output power feedback, high-voltage side and low-voltage side switch withstand voltage and current resistance matching, and active voltage citrus characteristics. For the application of power supply for low voltage and high current clean energy and When the hybrid power supply system of the power storage device can effectively improve the overall conversion efficiency of 'and reduce the system installation cost'. Remarks: References [1] SR Bull, ^Renewable energy today and tomorrow, M Proc. IEEE, vol 89, no. 8, pp. 1216-1226, 2001.

[2] S. Rahman, uGreen power: what is it and where can we find it?/5 IEEE Power Energy Mag., vol. 1, no. 1, pp. 30-37, 2003.

[3] F. Blaabjerg, Z. Chen, and SB Kjaer, "Power electronics as efficient interface in dispersed power generation systems, 5, IEEE Tram. Power Electron., vol. 19, no. 5, pp. 1184-1194, 2004. 13 1351806 [4] RJ Wai, CY Lin, R. Du·Duan, and YR Chang, “High-efficiency dc-dc converter with high voltage gain and reduced switch stress,5, IEEE Trans. Ind. Electron., Vol. 54, no. 1, pp. 354-364, 2007.

[5] L. Solero, A. Lidozzi, and J. A. Pomilio, "Design of multiple-input power converter for hybrid vehicles, IEEE Trans. Power Electron., vol. 20, no. 5, pp. 1007-1016, 2005.

[6] J. S. Lai and D. J. Nelson, “Energy management power converters in hybrid electric and fuel cell vehicles, 5, Proc. IEEE, vol. 95, no. 4, pp. 766-777, 2007.

[7] J. Zhang, JS Lai, RY Kim and W. Yu, “High-power density design of a soft-switching high-power bidirectional dc-dc converter, IEEE Trans. Power Electron.^ vol. 22, no. 4, pp. 1145-1153, 2007.

[8] E. Sanchis-Kilders, A. Ferreres, E. Maset, JB Ejea, V. Esteve, J. Jordan, A. Garrigos, and J. Calvente, “Soft switching bidirectional converter for battery discharging-charging, IEEE APEC Conf., 2006, pp. 603-609.

[9] S. Inoue and H. Akagi, UA bidirectional isolated dc-dc converter as a core circuit of the next-generation medium-voltage power conversion system, IEEE Trans. Power Electron., vol. 22, no. 2, pp 535-542, 2007.

[10] H. Tao, JL Duarte, and MAM Hendrix, “Three-port triple-half-bridge bidirectional converter with zero-voltage switching,” IEEE Trans. Power Electron., vol. 23, no. 2, pp. 782 -792, 2008.

[11] K. Wang, CY Lin, L. Zhu, D. Qu, FC Lee, and JS Lai, ^Bidirectional dc to dc converters for fuel cell systems, M Proc. PET'98, 1998, pp. 47-51 .

[12] R. J. Wai and R. Y. Duan, “High-efficiency bidirectional converter for power sources with great voltage diversity, 5, IEEE Trans. Power

Electron., vol. 22, no. 5, pp. 1986-1996, 2007.

[13] RJ Wai, C. Y. Lin, L. W· Liu, and YR Chang, “High-efficiency 14 1351806 single-stage bidirectional converter witii multi-input power sources, M IETProc. Electric Power Appl., vol. 1, no. 5, pp. 763-777, 2007.

[14] M. Marchesoni and C. Vacca, <cNew dc-dc converter for energy storage system interfacing in fuel cell hybrid electric vehicles, IEEE Trans. Power Electron., vol. 22, no. 1, pp. 301-308 The first diagram shows the circuit architecture of the first preferred embodiment of the high-boosting isolated dual-input power converter 0 of the present invention, which is composed of a first power supply circuit 101 and a second power supply circuit 102. a full bridge circuit 103, an active clamp circuit 104, and a DC output circuit 105, wherein the first power circuit ιοί is composed of a first input voltage source β, a first power switch, a first capacitor C, a first inductor L, and The first DC switch 1 is composed of a second input voltage source & a second power switch &2; a second capacitor C2; a second inductor L2; and a second switch & The full bridge circuit 103 is composed of a third switch & a fourth switch, a fifth switch, a φ sixth switch & a seventh switch *^7, an eighth switch & a ninth switch fork, a tenth switch core, and Isolation transformer 2: composed of isolation transformer 7; package The primary side of the isolation transformer and the secondary side of the isolation transformer have a turns ratio of 1:«, and the coupling coefficient is &; the active clamp circuit 104 is composed of a clamp switch and a clamp capacitor (the DC output circuit 105 is composed of a DC output capacitor). Q and DC output load\, DC output capacitor C. The upper voltage is the DC output voltage. The input power of the high-boost isolated dual-input power converter disclosed in the present invention, that is, the first input voltage source ^; and the second The voltage source factory 2 can be rectified into a DC power supply by a battery, a super capacitor 'fuel electric power, a solar photovoltaic 15 1351806 pool, a direct current wind power generator or an alternating current wind power generator as a direct current power supply. The first power supply circuit 101 and the second power supply circuit 1 〇2 mainly converts the electric energy in the form of the voltage source of the first input voltage source γ and the second wheel-in voltage source C into the first inductor current l and the second inductor respectively through the switching of the first switch & and the second switch A The current is presented in the form of current source power, and the two DC power sources are switched by the switch of the full bridge circuit 103 to be converted into an alternating current, which is passed through the isolation transformer. Boost 'minute timing to DC output circuit 1〇5 DC output capacitor (:. charge and provide energy to the DC output load and when the first inductor current L or the second inductor current b passes through the isolation transformer 7; during the boosting process Because the isolation transformer has a leakage inductance h, the first inductor current L or the second inductor current L cannot be immediately transmitted to the isolation transformer 7; therefore, the first switch $ or the second switch & parasitic capacitance is charged, and the general switch The parasitic capacitance value is very small, which will cause voltage surge when the switch is turned off, which is easy to damage the switch. Therefore, the converter is added to the active clamp circuit ι〇4 to solve this problem, the first switch, or the second switch & When the cut-off, the first inductor current y or the second inductor current L can charge the clamp capacitor Cc through the clamp switch & parasitic diode, which can effectively clamp the switch voltage to avoid the occurrence of a surge phenomenon, and then the push switch is known. Turning on, the energy stored in the clamp capacitor & is passed through the isolation transformer to supply power to the DC output circuit 1〇5. The high-boosting isolated double-input power converter disclosed in the present invention can be used in four states according to the power supply situation. The single-input power supply is independently supplied, and the dual-input power supply simultaneously supplies power and charging of the 1351806 electric power supply and the dual-wheel power supply, and the output power supply. Feedback. When the first input electric dust source W is the second input voltage source [both of which are faulty, or the power management system is intended to respond to different output loads and save energy - input voltage source γ or second input voltage source n When the power is not output, the first power switch ~ or the second power switch may be turned off, wherein the _ power switch ~ and the second power supply happy 2 can use the relay of the signal (4) to achieve the purpose of power cut-off. The invention improves the principle and the control effect of the prior art as follows: 1. Double-input power bidirectional converter architecture: The invention can simultaneously achieve dual-input power conversion and power transmission with bidirectional effect, and can save additional converters requiring two-way power transmission. It is also a converter that saves the need for additional dual power input requirements, making it ideal for hybrid power supply systems with power storage devices in today's power supply systems. 2. High-boost ratio and electrical isolation: The isolation transformer is used to achieve high boost ratio and electrical isolation. The grounding point of the first input voltage source γ and the second input voltage source G and the DC output of the DC output circuit 105 are respectively The grounding point of the voltage 分隔 is separated and can pass through the isolating transformer 7; the turns ratio is 1: „The output voltage is greatly improved, which is very suitable for the input power supply to be clean energy, and convert its DC low voltage to DC high voltage for the later stage power application. High-voltage side and low-voltage side switch withstand voltage and current matching: through the isolation transformer 7 in the full-bridge circuit 105; the full-bridge circuit 105 is divided into the low-voltage side third switch of the required low-voltage high-resistance 17-flow switch & , the fourth switch \, the fifth switch & and the sixth switch &, and the high voltage side seventh switch A, the eighth switch & the ninth switch & The switch can easily select the power semiconductor switch to effectively reduce the switch conduction loss and switching loss, and achieve the effect of high conversion efficiency. The input current is continuous: the first inductor 々 and the second inductor l2 have continuous current The input current of the smaller chopping wave can be taken out at the input power terminal. When applied to the clean energy source as the input power source, it can effectively filter out the current chopping and avoid damage to the clean energy device, prolonging the service life of the clean energy device. Clamping: through the clamp switch of the active clamp circuit 104, the current path and the clamp capacitor Cc are regulated, and the third switch s3' of the full-bridge circuit 1〇5 is connected to the fourth switch “s4, the fifth switch and The switching voltage of the sixth switch \off is clamped to the clamp capacitor voltage Fcc, and the switch voltage is clamped to the clamp capacitor voltage Kcc when the first switch A of the first power supply circuit 101 and the second switch of the second power supply circuit 102 are turned off. Solving the voltage surge caused by the leakage transformer 4 in the isolation transformer, the clamping capacitor Q can effectively absorb the difference between the first inductor current 仏 or the second inductor current L and the leakage inductor current center, and then turn on the clamp switch & Passing the month & amount stored in the clamp capacitor cc through the isolation transformer again supplies power to the DC output circuit 1〇5. The conduction loss is greatly reduced: when operating In the simultaneous power supply state of the dual input power supply, when the first switch 5 is turned on and the second switch & is turned off, the first switch current 1351806 is reduced to the difference between the first inductor current 1 and the second inductor current z.i2, similarly When the second switch <s2 is turned on and the first switch & is off, the second switch current is reduced to the difference between the second inductor current L and the first inductor current L, so the conduction loss can be greatly reduced, and is applied to the input power source. For low-voltage, high-current clean energy, the converter of the present invention can successfully reduce the conduction loss to further improve the conversion efficiency. 7. The voltage of the power semiconductor switch is independent of the input voltage: the power semiconductor # switch is only subjected to the voltage The DC output voltage and the turns ratio of the isolation transformer are related to this application. This feature is more suitable for power conversion applications where the DC input voltage varies widely. [Embodiment] The circuit structure of the first preferred embodiment of the high-boost isolation type dual-input power converter disclosed in the present invention is simplified as shown in FIG. 2, and the voltage and current symbols are defined in FIG. Isolation transformer rr is expressed as an ideal transformer factory and leakage inductance A 'ideal transformer 忑 contains ideal transformer primary side % and ideal transformer secondary side', assuming DC output capacitance (^ and clamping capacitor Cc is large enough, DC output circuit 105 can be equivalent Capacitor capacitor voltage Fcc is fixed for the DC output voltage source 'and assumes that all semiconductor components are ideal components, and the turn-on voltage drop of the switch and the diode can be ignored. According to the power supply of the converter, it can be divided into four states: Input power supply independent power supply, dual input power supply at the same time, dual input power supply separately and charging and output power feedback. (Gold) single wheel input power supply independent power supply state (1) first round input voltage source independent power supply - first - input voltage When the source G fails, or the power management system responds to different output loads and saves energy. #'To adjust the second input power (4)匕When the force rate is output, the second power source can be turned off & off to complete the power cut-off, and the second switch 4 is continuously turned on. At this time, the first-to-be-powered (four) J can be operated under the independent power supply state; The power supply current source is in the state of independent power supply. The current timing waveform is as shown in circle 3. The switch switching cycle time is defined, the - (four) responsibility cycle 4 and (4) (four) responsibility. "Because of the symmetry of the electric series, here The first half of the switch switching cycle is 0.5& and the circuit operating mode is shown in Figure 4. 1. Mode one [ί.~ When time ί = ί., the first switch & the fourth switch & The five switches & off, at this time, the second switch winter, the third switch winter and the sixth switch *S6 are still in the on state; the first switch q, the fourth switch & and the fifth switch & Clamping the capacitor voltage, during this dead time, the first inductor current L flows through the clamp switch 5^ parasitic diode, clamps the switch current iDs, «: is negative, charges the clamp capacitor Cc, the first inductor current l, ideal Transformer primary current, and clamp switch current Zdw c can be expressed as 1 (7) = ('ii +0-5WT~(Kc)(i-io) (1) im(t) = Y^Vcc-~)(tt〇) (2) 1351806 ZD5,ic (〇= ^i(〇-itl(i) (3) =^c(4 +Ld~nV.L·- VL nLsh where L represents the average value of the first inductor current L and A represents the first inductor current ripple] It is defined as the maximum value of the first inductor current minus the minimum value of the first inductor current. It can be known from equation (2) that the primary current of the ideal transformer is increased by zero. This current can induce the secondary current k of the ideal transformer. The seventh switch & and the tenth switch *S1() parasitic diode supply power to the DC output voltage source 4.

2. Mode 2 [(~&]: Mode 2 is the clamp switch seventh switch & and the tenth switch & during the conduction period, the seventh switch & and the tenth switch core zero voltage is turned on and replaced by synchronous rectification The current of the parasitic diode can reduce the switch conduction loss' while the clamp switch & zero voltage is turned on and can provide the clamp switch current ζ·

DS, SC

The positive direction path, the first inductor current L, the ideal transformer primary current ^ and the citrus switch current zossc can still be expressed as shown in equations (1) to (3), and the clamp switch is electrically | (· zns, sc flows through Zero point and its commutation time is ί = ί61, and the heart sc = 〇 is substituted into equation (3) to find the heart as shown in equation (4). hx=t, + LxLk{ILX +〇.5A^)[Fcc( L, + 1,) -3⁄4 -^ΑΓ1 (4) After the time, the clamp switch current zDSSC is positive, and the energy stored in the clamp capacitor Cc is collected together with the first inductor current L to the primary side of the ideal transformer. The ideal transformer primary side current ^ continues to increase, inducting the ideal transformer secondary side current k through the seventh switch "S7 and tenth switch & When the DC output voltage source 4 is supplied with β time / = 6, the ideal transformer primary current ^ 21 1351806 maximum value can be expressed as ^) = * d * ^) (w.) (5) where time '2 can be expressed as , 2=,. +(05_05 "_ peach. Mode 1 to mode 1" no leakage inductance across the core and coupling coefficient moxibustion can be expressed as (6) according to Kirchh〇ff, s Current Law, loop voltage The equation is expressed as follows:

Vcc~^Lk~vm=〇 (7) where the ideal transformer - the secondary side cross-pressure. Substituting equation (6) into equation (7), the clamp capacitor voltage Fcc can be rewritten as

Vrr=~Ly CC nk dc (8), that is, the first switch & the fourth switch & and the fifth switch & voltage are clamped to 4/(s) and the eighth switch and the ninth switch & The upper voltage is clamped to the crucible. 3. Mode 2h~g: When time ί = 6, the clamp switch & seventh switch 矣 and the tenth switch core are cut off, causing the clamp switch current to drop to zero and the push switch current to rise to the clamp capacitor. The voltage factory, at this time, the voltage of the clamp switch source to the second input voltage source factory 2 is zero volt, and the first switch electric b, the fourth switch voltage and the fifth switch voltage V_ are reduced to zero volts, An input voltage source γ charges the first inductor ,, because of the leakage inductance 厶, the clamp switch current is reduced to zero, and the speed is better than 22 1351806. The primary side current of the press is reduced to zero, and the clamp switch current is reduced. At zero o'clock, the parasitic diode of the fourth switch & and the fifth switch & is turned on with a very small current to connect the difference between the primary current of the ideal transformer and the first inductor current y 'the ideal transformer primary current' is almost equal to An inductor current L, and the loop voltage equation on the leakage inductor A can be expressed as = 〇, the primary transformer current k is decremented by the slope of _Krfc/nLA, and the energy of the leakage inductor A is continuously transmitted through the transformer. DC output supply voltage source 4. 4. Mode 4 [G~^4]: When the time ί = ί3, the first switch & is turned on, at this time, the second switch 4, the third switch & and the sixth switch fork are still in the on state, due to the a switch 5; the voltage before the conduction has dropped to zero volts, the first switch & conduction has a zero voltage switching characteristic, after the first switch & conduction, the first input voltage source ^ continues to charge the first inductor 4, first The inductor current L increases linearly; when the ideal transformer current has been reset to zero in mode 4, the ideal transformer crossover voltage is also zero', so the seventh switch & eighth switch & ninth switch ^ and tenth switch \Up voltage is clamped to ^/2. 5. Mode 5h~ When the time is up, the fourth switch & and the fifth switch & turn on, because the fourth switch \ and the fifth switch & before the conduction voltage has been reduced to zero volts, the fourth switch \ and The five-switch & conduction has the characteristic of zero voltage switching, and the first inductor A is still in a charging state, and the first inductor current b flows through the first switch $, the third switch & in a shunt manner according to the resistance on the line flowing through the path; Three paths of the fourth switch & and the fifth switch & series sixth switch & 23 According to the voltage_second balance theory, the average voltage of the first-inductor A is zero in the switching period, and the relationship can be expressed as m + 2dd)Ts + (F, - vcc)(l -dx- 2dd) Ts = 0 (9a)

Vcc =~~~--V l~d\~^dd (9b) According to equations (8) and (9), and assume the dead zone time period "very", the first round of voltage source and DC output The relationship between the source and the source can be expressed as ^dc~~--nkV. l~dx 1 (10) and the first inductor current chopping can be expressed as

2Α

VATS

(2) The second input voltage source is independently powered. When the first input voltage source K fails, or the power management system responds to different output loads and saves energy, if the first input voltage source K is to be output, the power is not output. The first power switch can be turned off to complete the power cut-off, and the first switch g is continuously turned on. At this time, the second input voltage source G can be operated in an independent power supply state; the second input voltage source is independent The voltage and current timing waveform of the power supply state is shown in Figure 5. The second switch duty cycle is defined. Due to the symmetry of the circuit operation, the first half of the switching cycle is analyzed 〇57^, and the circuit operation mode is as shown in Fig. 6. Mode one [/. ~Μ: When time ί = (., the first switch $, the third switch brother and the sixth switch fork are still in the on state, and the fourth switch & and the fifth switch <s5 has been 24 1351806 for a period of time, At this time, the second switch & the second switch &, the fourth switch \ and the fifth switch fork voltage clamp are equal to the clamp capacitor voltage tc, during this dead time, the second inductor current ii2 flows through Clamp switch & parasitic diode, clamp switch current is negative, charge the clamp capacitor, ideal transformer primary current ^, second inductor current and clamp switch current can be expressed as equation (2), formula (12) and (13) iL2(t) = (IL2 + 〇.5ML2) + ±(V2 - Vcc){t -1,) (12) ^Ds.scif) = ^i(0 ~ hii{) =[^^ ^^. )_ Team 2+. 5峋) (13) where L represents the average value of the second inductor current L, representing the second inductor current ripple, which is defined as the second inductor current maximum minus the first inductor current minimum. It can be known from equation (2) that the primary current of the ideal transformer 'increasing from zero, this current can induce the secondary side current core 2 of the ideal transformer, via the seventh switch & and φ the tenth switch\parasitic diode pair The DC output voltage source 匕c is powered. 2. Mode 2 [[~ Mode 2 is the clamp switch, the seventh switch & and the tenth switch A. During the conduction period, the 'seventh material and the tenth level & zero voltage conduction and replace the current of the parasitic diode by synchronous rectification, which can reduce the switch conduction loss (4), the switch knows that the electric power is turned on and can provide the switch current ^ . The positive direction transformer of the positive direction—the secondary current, the second inductor current ^, and the clamped switch power f can still be expressed as shown in equations (7), (1), and (1), and the clamped switch current W 夂 flows through the zero point and changes The phase time is, =, 62, and 25 1351806 sc = 〇 substituting into equation (13) can be obtained as shown in equation (14). Hi ~t〇+ LlLk{lL1 + 〇.5Aii2)[fcc(^* + A) -丨(14) When time (after 'box switching current 1ds, sc is positive, the original is stored in the borrowing capacitor Cc The energy is collected together with the second inductor current L to the primary side of the ideal transformer. The current of the ideal transformer is gradually increased. The current of the secondary side of the ideal transformer is induced by the seventh switch and the tenth switch. DC output voltage source 匕c power supply. When time i = G, the maximum value of the primary transformer current k can also be expressed as shown in equation (5), time (2 can be expressed as L = G + (〇.5-0· 5 "- Mao Fan. During mode 1 to mode 2, the leakage inductance A cross-over voltage and coupling coefficient & can also be expressed as shown in equation (6). According to Kirchoff's voltage law, the clamp capacitor voltage Fcc can be rewritten as shown. (8), that is, the second switch 4, the fourth switch \ and the fifth switch are both clamped to the voltage of 4/(氓)', and the voltages of the eighth switch and the ninth switch are clamped to the clamp. Mode 3 h~ When time i = q, the clamp switch & seventh switch & and the tenth switch core are turned off, causing the clamp switch The flow center is especially reduced to zero and the clamp switch current Vsc rises to the clamp capacitor voltage. At this time, the clamp switch & source is opposite to the second input voltage source & the relative voltage is zero volt, and the second switch voltage Vi2, fourth The switching voltage ^ and the fifth switching voltage (6) are reduced to zero volts to be 'the second input voltage source & charging the second inductor ,, due to the presence of the bubble leakage inductance V clamping the switching current 'lower to zero speed than the ideal transformer A side current ^The speed is reduced to zero. When the switch current 26 1351806 W is reduced to zero, the parasitic diodes of the fourth switch & and the fifth switch & are turned on with a very small current to connect the ideal transformer to the primary side. The difference between the second inductor current L, the ideal transformer primary current ^ is almost equal to the second inductor current L, and the loop voltage equation on the leakage inductor 4 can be expressed as, ideally, the slope of the primary side is reduced... The energy is continuously supplied to the DC output voltage source B through the transformer. 4_Mode 4 [, Wide g: When the time is ^, the second switch & the fourth switch & and the fifth switch. Pass, at this time, the first switch V third switch & and the sixth switch 'is still in the on state' because the second switch & the fourth switch & and the fifth switch & the pre-conduction power has been reduced to zero volts 'The second switch & the fourth switch & and the fifth switch 4 conduct the characteristic of zero voltage switching. After the second switch & is turned on, the second input voltage source K continues to charge the second inductor & The inductor current L increases linearly, and the second inductor current G flows through the second switch & the third switch & series fourth switch & and the fifth switch & series in accordance with the resistance of the line flowing through the path Three switches & three paths; in mode four, when the ideal transformer current has been reset to zero, the ideal transformer has zero crossover voltage, so the seventh switch S?, the eighth switch & the ninth switch <s9 And the voltage on the tenth switch core is clamped to 匕, /2. 5. Mode 5 1 > 4: When time ί = ί4, the third switch "S3 and sixth switch & cut off, the third switch A and the sixth switch & zero voltage cutoff, and the second inductance & 27 1351806 is still in a charging state 'The second inductor current L flows through the second switch A in a single-path. According to the volt-second balance theory, the average voltage of the second inductance ping in the switching period is zero, and the relationship can be expressed as V2{d2 + 2dd)Ts + (V2 - Vcc)(\ - d2 - 2dd)Ts = 0 1

(15a) (15b) The second output V〇c is based on equations (8) and (15), and assumes that the dead time period of the duty cycle is small. The voltage source & and the DC output voltage source ρ ς can be expressed as d2 nkV2 (16) The second inductor current is chopped by Δ. Can be expressed as △ / 11 2L2

VATS (17) (贰) dual input power supply simultaneously

The first input voltage source K and the second input voltage source ρ are connected to the dual input power supply at the same time. The circuit analysis is constructed under the condition that the first inductor current L is greater than the second inductor current L, and the voltage and current timing waveform is as shown in FIG. It is shown that due to the symmetry of the circuit operation, the first half of the switching cycle is 〇5J; and the circuit operation mode is as shown in FIG. Mode 1Λ4]: When time ί=/〇, the first switch & the third switch & and the sixth switch 5; are still in the on state, and the fourth switch & and the fifth switch & Time, at this time, the second switch & the second switch & the fourth 28 1351806 switch and the fifth switch & upper voltage clamp are equivalent to the clamp capacitor voltage Fcc, in this dead time hair & According to Kirchhoff's current law (Kirchhoff's C_nt !^) derivation can be obtained ^. The first switching current center, S1, can be expressed as compared with the first inductor current Μ completely flowing through the first switch V. This characteristic can effectively reduce the switch conduction loss, since the first inductor current y is greater than the second inductor current 匕2 Therefore, the first switch current /_ is positive, and the second inductor current Q flows through the first power supply circuit and clamps the switch to the parasitic diode, and then flows back to the second inductor A, and the box switch current "c" Negatively, charging the clamp capacitor Cc, the ideal transformer primary current core 1, the second inductor current b, and the clamp switch current can also be expressed as equation (2), equation, and equation (13), respectively. It can be known that the ideal transformer n _ secondary current ~ 渐 is gradually increased by zero, this current can induce the ideal transformer secondary current ^, through the seventh switch A and the tenth switch 5 ^. Parasitic diode pair DC output Voltage source 匕 power supply 2. Mode 2 h~?2]: Mode 2 is the first segment of the clamp switch. During the conduction period, the seventh switch S7 and the tenth switch are turned on, the seventh switch... and Ten switch 5; zero voltage conduction and replace the parasitic diode with synchronous rectification Current, which can reduce the switch conduction loss, while the clamp switch & zero voltage is turned on and can be used to clamp the switch current ^ redundant positive direction path, ideal transformer primary side current V, second inductor current core and clamp switch current & redundant It can still be expressed as shown in equations (2), (12) and (13), the clamp switch current ^ flows through the zero point and its commutation time is i = , and the = 〇 substitution type (丨3) can be obtained. As shown in equation (i 4) 29, when the time/after, the clamp switch current is positive, the energy stored in the clamp capacitor cc is combined with the second inductor current L to the primary side of the ideal transformer. The primary side current k of the transformer continues to increase, and the secondary current of the ideal transformer is induced to supply power to the DC output voltage source 4 through the seventh switch and the tenth switch core. When the time i = G, the primary current of the ideal transformer is first. The segment clamp switch "sc maximum value can be expressed as shown in equation (5), and time 6 can be expressed as 6 = heart + (0.5_0.5 "_4) 7^. During mode 1 to mode 2, leakage inductance 4 cross-voltage The female relationship with the coupling coefficient can also be expressed as shown in equation (6), according to Ke The Scheffer voltage law is derived, and the clamp capacitor voltage can be rewritten as shown in equation (8), that is, the second switch foot, the fourth switch & and the fifth switch & voltage are clamped to &/(„&) And the eighth switch & and the ninth switch & upper voltage are clamped to L. Mode three h~y·· When time ί = ί2, the clamp switch & seventh switch & and the tenth switch core are cut off, causing the clamp switch current to decrease to zero and the clamp switch voltage to be 1; take rise to the clamp capacitor Voltage. At this time, the clamp switch & source is opposite to the second input voltage source & the relative voltage is zero volt, and the second switching voltage 〜2, the fourth switching voltage ”, and the fifth switching voltage (6) are reduced to zero volts. The second input voltage source G charges the second inductor as much as possible. Because of the shallow leakage inductance V, the switch current is reduced to zero. The speed of the transformer is lower than the ideal transformer-secondary current ~ 丨 is reduced to zero, when the switch current is clamped. When W is reduced to zero, the fourth open β! A and the parasitic diode of the fifth switch 4 are turned on with a very small current of 1351806 to bridge the difference between the primary side current of the ideal transformer and the second inductor current L, and the ideal transformer primary current k It is almost equal to the second inductor current L' and the loop voltage equation on the leakage inductor A can be expressed as vu +~1=0. The slope of the ideal transformer primary current ~丨 decreases with the slope of -匕/wZ^, and the energy of the leakage inductor 4 passes through the transformer. Continuously supply power to the DC output voltage source.

4. Mode 4 [G~Q]: When time ί = ί3, the first switch $丨, the third switch & and the sixth switch & are still in the on state, and the second switch & The switch \ and the fifth switch & turn on, since the second switch & the fourth switch & and the fifth switch & the voltage before the conduction has dropped to zero volts, the second switch & the fourth switch & The fifth switch & conduction has the characteristic of zero voltage switching. After the second switch & is turned on, the second input voltage source F2 continues to charge the second inductor. At this time, the first inductor A is still in the charging state, and the first inductor current is one. And the second inductor current ii2 increases linearly, and the rising slopes are γ/々 and & respectively, and the first inductor current L and the second inductor current L flow through the path according to the minimum on-line resistance shunting mode; When the ideal transformer current is reduced to zero, the secondary side voltage of the ideal transformer is also zero, the seventh switch, the eighth switch & the ninth switch & and the tenth switch & The upper voltage is 匕/2. Due to the symmetric switching mode of the first switch driving signal 2 and the second switch driving signal Γ2, the first switch driving signal 忑 and the second switch driving signal 5 are evenly distributed, and the mode 4 elapsed time can be expressed as ί4 - ί3 = 0.25« + c/2 -1) [. . 31 1351806 5. Mode 5 [q~ί5]: When time (=/4, the second switch & the fourth switch & and the fifth switch ^ are still in the on state, the first switch & The third switch & and the sixth switch fork are turned off; the first switch & the third switch & and the sixth switch & upper voltage clamp are equivalent to the clamp capacitor voltage, in this dead time period, according to the Kirchhof current The law derivation can be, the second switch current iDS_52 can be expressed as Zi2 - Ζ · £1, compared to the second inductor current 々 2 completely through the second switch &, this characteristic can effectively reduce the switch conduction loss, due to the first inductance The current Ζ·£| is greater than the second inductor current L, so the second switch current is negative, and the first inductor current L flows through the clamp switch parasitic diode and the second power circuit, and then flows back to the first inductor horse. At this time, the clamp switch current is negative, and the clamp capacitor Cc is charged. The ideal transformer first inductor current t, the primary side current k, and the clamp switch current zowc can be expressed as (18), respectively.

lLi(t) = (/„ + 0.5Δ/,!) + ~~(yy _ vcc^t _Q

~1(0 = a »4) (19) nLiLk +0·5Δζιι) (20) where time q can be expressed as G = ί〇+025 (1+ΚΚ. From equation 〇9), the ideal transformer can be obtained once. The side current ~ 渐 is gradually reduced by zero, this current can induce the ideal transformer secondary side current ~ 2 ' via the eighth switch & and the ninth switch & parasitic diode to the DC output voltage source 4 power. 32 1351806 6. Mode 6 [is~g: Mode 6 is the second segment of the clamp switch. During the conduction period, the eighth switch & and the ninth switch are turned on, the eighth switch & and the ninth switch & Zero voltage is turned on and the current of the parasitic diode is replaced by synchronous rectification, which can reduce the switch conduction loss, while the clamp switch & zero voltage is turned on and can provide the positive direction path of the clamp switch current state, the first inductor current L, The ideal transformer primary current ^ and the clamp switch current can still be expressed as shown in equations (18), (19) and (20), the clamped switch current center wc flows through the zero point and its commutation time is ί = ί«, Substituting k, iC=〇 into equation (20) can be obtained as shown in equation (21) β = ^4 + 〇.5Δ^)[^(Ζ4 -/,)-3⁄4 +^ΑΓ' (21) When time After that, the clamp switch current is positive, and the energy stored in the clamped electric valley Cc is collected together with the first inductor current L to the primary side of the ideal transformer. The current side k of the ideal transformer is negative and continuously decreases, and the ideal is induced. The secondary side current core of the transformer is supplied to the DC output voltage source 4 via the eighth switch and the ninth switch & . When time ί=ί6, the minimum value of the primary transformer current k of the ideal transformer in the second stage clamp switch can be expressed as α'6) = ± (22) where time 匕 can be expressed as (2) 4 + (〇.5_〇. 5KFs. Mode 5 to Mode 6 'The leakage inductance, cross-pressure and coupling coefficient moxibustion can also be expressed as (23) v,=~(l-Wc 33 1351806 According to Kirchoff's voltage law, the loop voltage equation is expressed as follows:

Vcc+^Lk+vm=〇The ideal transformer primary side span voltage%1=_匕/„ (24), the clamp capacitor voltage rcc can also be rewritten as shown in equation (8), that is, the first switch $, the third switch Both the & and the sixth switch 怂 voltage are clamped to &/(虓), and the seventh switch is clamped to 4 at the tenth switch and the upper voltage.

Mode sevenhy: When time ί = &, the clamp switch is known, the eighth switch & and the ninth switch & cut off, causing the clamp switch current state to fall to zero and the clamp switch voltage v0iS5c to rise to the clamp capacitor voltage, At this time, the clamp switch ^ source is opposite to the second input voltage source & the relative voltage is zero volt, and the first switching voltage, the third switching voltage v 〇 is reduced to zero and the sixth switching voltage to zero volts, the first input The voltage source γ charges the first inductor ,, and because of the leakage inductance 13⁄4, the pumping switch current is reduced to zero.

(24) The speed at which the current side of the primary side of the equation (23) is increased to zero is fast, and when the current of the clamped switch is reduced to zero, the parasitic diodes of the third switch 4 and the sixth switch & The minimum current is turned on to connect the current of the ideal transformer to the first inductor current L. The ideal transformer primary current k is almost equal to the first inductor current L, and the loop voltage equation on the leakage inductor A can be expressed as Vu+v〃i. =〇, ideal transformer 1§ The primary current k is incremented by the slope of 匕c / 'The energy of the leakage inductance 4 continues to supply the DC output voltage source Krfc through the transformer. 8. Mode 8A~g: When time / = 〇, the earth switch &, the fourth switch \ and 34 1351806 The fifth switch & is still in the on state, at this time the first switch 乂 is turned on, due to the first The voltage of the switch *^ has been reduced to zero volts before the conduction, the first switch & conduction has zero voltage switching characteristics, after the first switch $ is turned on, the first input voltage source K continues to charge the first inductor 4, at this time the second The inductor core is still in a state of charge, and the first inductor current k and the second inductor current zi2 linearly increase, and the rising slopes are respectively γ/Α; and in the eighth mode, when the ideal transformer current is zero, the ideal transformer secondary side voltage is also The voltages of zero, seventh switch & eighth switch 乂, ninth switch S9 and tenth switch & are both & /2. According to the volt-second balance theory, the average voltage of the first inductor and the second inductor eight is zero in the switching period, and the relationship can be expressed as equations (9) and (15) according to equations (8) and (9). And equation (15) 'and assume that the duty cycle of the dead time is small, the first input voltage source K, the second input voltage source κ and the DC output voltage source & relationship can be expressed as

Vdc = T^nkVi = TZJ; n^ (25) The first inductor current chopping and the second inductor current chopping aq can also be expressed as shown in equations (11) and (17). (Parameter) Dual Input Power Supply Power Supply and Charging Status In today's power supply system development trend, hybrid power supply systems usually have at least one power storage device such as a battery or a super capacitor to provide continuous power output when another power failure occurs, or Is the main power output during the transient time of another power supply' so the power supply system needs to have the function of two-way power transmission, 35 1351806 enables the power storage device to have charging and power supply circuit ❶ under this power supply state analysis, assuming the second The input voltage source G is a power storage device, and can be charged. When the first input voltage source K is in the power supply state and the second input voltage source K is in the charging state, the first inductor current L is positive, and the first inductor current L is negative. The circuit analysis is constructed under the condition that the absolute value of the first inductor current L is greater than the absolute value of the second inductor current L. At this time, the voltage and current timing waveform is as shown in FIG. 9 'Because of the symmetry of the circuit operation, the first half of the switch is analyzed here. The cycle is 0.5 & while the circuit operation mode is shown in Figure 10. • L mode one [(.~U: When time ί = ί❶, the first switch \, the third switch sway and the sixth switch 怂 are still in the on state, and the fourth switch \ and the fifth switch have been closed for a while. At this time, the second switch & is turned off, causing the second switch & parasitic diode to be naturally turned on, the second inductor current L flowing through the second switch & parasitic diode; the third switch & \, the fifth switch & and the sixth switch & the upper voltage is zero 'the seventh switch, the eighth switch & the ninth switch & and the tenth switch 5; the upper voltage is 4/2, In the dead time, the first electric sensor and the second inductor A are respectively in a charging state and a discharging state, and the slopes of the first inductor current Zil and the second inductor current L are respectively F, /hook and Κ2 /12. 2. Mode 2 to Mode 2 is the first clamp switch. During the conduction period, the seventh switch & and the tenth switch core are simultaneously turned on in this interval, and the capacitor voltage Fcc is clamped to the second inductor and the second voltage. Source & charge, and supply power to the DC output voltage source through an ideal transformer, where the second inductor The flow L is negative and flows through the first switch \ ' and the first inductance 1 is still in a state of charge. In the mode 36 1351806, according to the Kirchhoff current law, the first switch current can be expressed as L -zu. , the second inductor current ii2, the ideal transformer primary side current k and the clamp switch current can be expressed as z£2 (0 = ihi + °·5Δ/Ι2) + -~{V2 - Vcc){t -ί,) ( 26) (27)

'as,sc (') = 'μ (7) _ 'i2 (0 —XnULk + L2) - nV2Lk - V bath Lf nL2Lk ]{t-tx)~{IL2+Q.SML2) (28) where time A is again Expressed as A = i. . It can be known from equation (27) that the primary side current of the ideal transformer is gradually increased from zero, and this current can induce the secondary current of the ideal transformer, and the power supply to the DC output voltage source C is supplied through the seventh switch & During mode 2, the leakage inductance A cross-pressure and coupling coefficient moxibustion relationship can also be expressed as shown in equation (6). According to the Kirchoff voltage law, the clamp capacitor voltage can be rewritten as shown in equation (8), that is, the second switch &;, the fourth switch \ and the fifth switch & voltage are boxed in the 〇, and the eighth switch & and the ninth switch 5; the upper voltage is clamped to 匕. 3. Mode 2匕~^]: When time / = ?2, the clamp switch is known, the seventh switch & and the tenth switch core is cut off, causing the clamp switch current to 'decrease to zero, the second view 2 parasitic pole The body is naturally conducting to withstand the second inductor current. The second inductor B2 releases energy to charge the second voltage, and after the second switch & parasitic diode conductance L, the voltage is instantaneously inverted for the leakage inductance, and the loop voltage equation can be expressed as Vw = 〇, 37 1351806, The slope of the ideal transformer primary side is decremented by 'and the fourth switch and the fifth switch parasitic diode are turned on, and the energy stored on the bubble leakage inductance L* is transmitted to the DC output voltage source 透过 through the transformer. 4. Mode 4h~Μ: When time i = G, the first switch 4, the third switch & and the sixth switch fork are still in the on state, and the second switch & the fourth switch & The fifth switch & is turned on, the second switch & zero voltage is turned on and the current of the parasitic diode is replaced by synchronous rectification, and the first inductor A is still in a charging state, the first inductor current core and the second inductor current L flow The path is distributed according to the minimum line resistance shunting mode; when the ideal transformer current is reset to zero in mode 4, the secondary side voltage of the ideal transformer is also zero, the seventh switch & the eighth switch \, the ninth switch The voltage on both the fork and the tenth switch is 匕 / 2. 5. Mode 5h~y: When time ί = &, the second switch & the fourth switch & and the fifth switch & are still in the on state, at this time the first switch ", the third switch * S3 and the sixth switch &cutoff; the first switch & the third switch & and the sixth switch 电压 voltage clamp are equal to the clamp capacitor voltage & C, in this dead time, according to Kirchhof current law The derivation can be obtained, the second switch current can be expressed as, and the first inductor current flows through the box switch *SC parasitic diode and the second power circuit, and then flows back to the first inductor 々, at this time, the switch current Negative, for the box capacitor & charging, the ideal inductor - inductor current 匕丨, - secondary current ^ 丨 and clamp switch current " can be divided into 38 1351806 is not expressed as equation (18), formula (19) and Equation (20). It can be known from equation (19) that the primary side current of the ideal transformer is gradually reduced by zero. This current can induce the secondary side current of the ideal transformer. After the eighth switch and the ninth switch\parasitic diode pair DC Output Voltage Source 匕 Power Supply 6. 6. Mode 6 [ί5~ίό]: Mode 6 is the second stage clamp switch & During the conduction period, the eighth switch <S8 and the ninth switch <S9 are turned on at the same time in this interval, and the eighth switch & ninth switch & and clamp switch <SC zero voltage is turned on and replaced by synchronous rectification The current of the parasitic diode can reduce the switch conduction loss. The first inductor current center, the ideal transformer primary current ^ and the clamp switch current "π can still be expressed as equations (18), (19) and (20). Shown. 7. Mode seven [L~. When time ί =匕" will clamp switch & eighth switch & and ninth switch \ cutoff, causing the clamp switch parasitic diode to conduct naturally and the ideal transformer secondary current k Flow through the eighth switch, and the ninth switch ~ parasitic diode, the first inductor current during this dead time. The clamp capacitor is continuously charged and the DC output voltage source 匕 is supplied through the transformer. In mode 5 to mode 7, the leakage inductance A cross-over and coupling coefficient & can also be expressed as shown in equation (23). According to Kirchhoff's voltage law, the clamped capacitor voltage 匕c can be rewritten as in equation (8). That is, the first switch & the third switch & and the sixth switch S6 voltage are clamped fresh rfc / (咐, and the seventh switch & and the tenth switch \. The upper voltage is clamped to B. 8· Mode 8 [W8]: When the time is called, the second switch, the fourth switch & and the 39 !3518〇6 fifth switch & are still in the on state, at this time, the first switch & is turned on, and the voltage on the leakage inductor 4 is turned on. Instantaneous inversion, the loop voltage equation can be expressed as vu+vm = 〇, the ideal transformer primary current increases to zero with a slope of 匕/„4, and the energy stored in the leakage inductance 透过 is transmitted through the transformer to the DC output voltage source 4 After the first switch & is turned on, the first input voltage source γ charges the first inductor, and at this time, the second inductor/^ is still in a discharging state, and the first inductor current h and the second inductor current L linearly increase. The rising slopes are 卩/马 and 6/12; in mode eight, when ideal After the voltage of the voltage is reset to zero, the voltage on the secondary side of the ideal transformer is also zero. The seventh switch, the eighth switch & the ninth switch & and the tenth switch are all 匕c / 2. According to the volt-second balance theory, the average voltage of the first inductor hook and the second inductor 2 in the switching period is zero, and the relationship can be expressed by equations (29) and (3).

VxdxTs + {V{-Vcc){\~dx)Ts^ (29a)

Vcc~\-dxVi (29b) V2(d2 + 4dd)Ts + (V2 - Fcc)(l -d2~ 4dd)Ts = 0 (3〇a)

Vcc-i-d2-4ddVl (30b) according to equations (8), (29) and (30), and assumes that the duty cycle of the dead time period is small, the first input voltage source γ, the second input voltage source G The relationship between the DC output voltage source 4 and the DC output voltage source 4 can be expressed as Equation (25). The first-inductance current chopping (4) and the second inductive current chopping Δζ2 can also be expressed as shown in the equations (U) and (17).丄乃1806 (肆) output power feedback state When the DC output voltage source 4 voltage rises abnormally, or the power management system responds to different output loads and saves energy, it is necessary to adjust the first-wheel voltage source β to output power. When the DC output voltage source Κ charges the second voltage source 电源 of the power storage device, the first power switch can be turned off to complete the power cut-off purpose and the first switch is continuously turned on, and the second input voltage source is at this time. G can be operated under the output power supply anti-column H, in order to facilitate analysis of the DC output voltage source Κ charging the second voltage source ' 'The leakage inductance 4 is equivalent to the ideal transformer secondary side %, to the secondary side leakage inductance core It means that the magnitude of the sense is equal to, the equivalent circuit can be represented as shown in Figure 10-, and the voltage and current timing waveform is shown in Figure 12. Due to the symmetry of the circuit operation, the first half of the switching cycle is analyzed here. 5&, and the circuit operation mode is shown in Figure 13. 1, mode one [/. ~ When time ί = ί. The first switch $, the third switch & and the sixth switch fork are still in an on state, and the fourth switch & and the fifth switch & have been turned off for a period of time, at which time the second switch & The second switch & parasitic diode is naturally turned on, and the second inductor current L flows through the second switch & parasitic diode 'second switch 4, fourth switch Α, fifth switch 4 and sixth switch & The voltage is zero 'the seventh switch * v the eighth switch v the ninth switch & and the tenth switch 5; The upper voltage is 4/2. During this dead time, the second inductor A is in a discharging state, and the slope of the second inductor current L is 矣, and the second voltage source K2 is charged. 1351806 2·Mode 2h~Mode 2 is the clamp switch seventh switch & and the tenth switch core is turned on, the clamp capacitor voltage rcc charges the second inductor & and the second input voltage source f2, and the DC output voltage source & The second inductor 12 and the second input voltage source y2 are charged together by the ideal transformer. At this time, the ideal transformer primary side voltage % is equal to the clamp capacitor voltage 匕c, the second inductor current L, the ideal transformer primary side current ^ and the clamp switch Current slave redundancy can be expressed as equation (26), equation (31), and equation (32), respectively.

(31) ^Νΐ(0 ~ -{nVQC ~ Kk)(f ~〇Lkl bs,sc (Ο ~ (0 ~ hi ) FCC(^2I2+ LiLn ·](卜〇-(,ι2+〇·5Δ.) ( 32) It can be known from equation (31) that the ideal transformer—the secondary current ^ is gradually reduced by zero. When the current is switched, the current is flowing through the zero point and its commutation time is ί = ίΜ, and the heart is redundant = 〇 (32) The payable is as shown in equation (33).

-f +__L2Lk2(IL1+0.5ML7) 64 1 Vcc{n2L2+Lk2)~VdcnL2-V2Lk2 (33) When the time is called 4, the clamp current w is negative, and the DC output voltage source 4 is clamped through the ideal transformer. The capacitor q and the second inductor are particularly charged. Time i = i2af ‘ideal transformer—secondary current and minimum value can also be expressed (34) Trans-pressure and light-combination coefficient (4) can be Ζ·ΛΠ (’2 ) = "7 — (W^CC ~ ~ 〇

During the Hi mode two period 'secondary leakage inductance 42 1351806 is not expressed as vLki=(}-k)Vdc (35) According to Kirchoff's voltage law, the loop voltage equation is expressed as follows:

Vdc~VN2~VLk2=0 (36) where the ideal transformer secondary side voltage is ~2 =„FCC. Substituting equation (35) into equation (36), clamp capacitor voltage?^ can be rewritten as (37)

That is, the second switch & the fourth switch S4 and the fifth switch fork voltage are both clamped to the moxibustion 4/«, and the eighth switch & and the ninth switch & 3. Mode 2 [q~: When time (=&' will clamp switch & seventh switch & and tenth switch & cutoff, causing clamp switch current Lx to decrease to zero and clamp switch current to rise to Clamping the capacitor voltage pcc, at this time, the voltage of the clamped switch source to the second input voltage source factory a is zero volts, the ideal transformer voltage is reduced to zero volts, and the voltage on the secondary side leakage inductor core 2 is instantaneously inverted 'secondary The current on the side leakage inductance 矣2 continuously causes the parasitic diode of the eighth switch & and the ninth switch fork to be turned on, and the conduction loop voltage equation can be expressed as να2+ν"2 + ς ς 〇 'ideal transformer secondary side current k The slope is incremented to zero in a very short time, and the stored energy on the secondary leakage inductance / ^ is released to the DC output voltage source 匕c, while the second switch & parasitic diode is naturally conducted to withstand the second Inductor current L, in this dead time rs, the second inductance is in the discharge state, the slope of the second inductor is 43 1351806, and the second voltage source K is charged. 4. Mode four h~g: When time / = ,, The first switch $, the third switch & and the sixth switch & are still in an on state, at this time, the second switch & the fourth switch \ and the fifth switch & are turned on, and the second switch \ zero voltage is turned on and The current of the parasitic diode is replaced by a synchronous rectification method, and the second inductor current ^2 flows through the second switch & the third switch * series fourth switch & And the fifth switch & series sixth switch & three paths. 5. mode five when time ί = ~, the second switch & fourth switch & and the fifth switch is still in the on state, at this time The third switch & and the sixth switch are turned off; the third switch winter and the sixth switch & zero voltage are turned off, while the second inductor is still in the charging state, and the second inductor current l flows through the second switch in a single path. *^. During mode 3 to mode 5, when the ideal transformer current has been reset to zero 'the ideal transformer is also zero across the transformer, so the seventh switch v eighth switch & ninth switch & The upper voltage is clamped to 匕/2. Balance according to volt-seconds Theory, during the switching cycle. The second inductor has an average voltage of zero'. The relationship can be expressed as equation (10), according to equations (37) and (3〇), and assumes that the dead time duty cycle is small. The relationship between the second input voltage source G and the DC output voltage source 可 can be expressed as Equation (10), and the second inductor current 涟 岣 can also be expressed as shown in Equation (17). The high-boost isolation type disclosed in the present invention The first embodiment of the input power converter is 1351806. The technical feature of the preferred embodiment is: the first point has a two-input power bidirectional conversion mechanism, and a voltage source with different electrical characteristics can be used as an input terminal to jointly raise the voltage level and simplify multiple groups. The converter boosts and parallels the power supply architecture; the second point, with high boost ratio and electrical isolation characteristics, using the isolation transformer turns ratio and duty cycle control, can obtain high voltage gain; third, the conversion efficiency is high, Under the input-output voltage isolation architecture, the high-voltage side high-current and high-voltage side low-current characteristics are strictly distinguished, and low-cost high-efficiency power components suitable for the voltage range can be selected respectively. Fourth point, • Active power The pressure clamp technology solves the voltage surge problem caused by the leakage inductance of the isolation transformer, and effectively outputs the leakage inductance energy to the DC output circuit. The fifth point has the characteristic that the conduction loss is greatly reduced, and the two input power supply circuits are connected in series. When the converter is operated in a dual-input power supply state, the conduction loss can be greatly reduced. When applied to a clean energy source where the input power source is low voltage and high current, the conduction loss is successfully reduced and the conversion efficiency can be greatly improved; The input current of the dual input power supply is continuous, and the input power is presented in the form of DC current source energy, and the input current of the smaller chopping wave can be taken out at the power supply end. When applied to the clean power source as the input power source, the current can be effectively filtered. Chopping and avoiding damage to clean energy devices and prolonging the service life of clean energy devices; seventh, the voltage of the power semiconductor switch is only related to the DC output voltage and the turns ratio of the isolation transformer. This feature is more suitable for large-scale changes of DC input voltage. Power conversion device application. The high-boost isolation type of the high-boost isolated dual-input power converter input 45 1351806 is clean energy, or the output DC power supply has a protection mechanism, and the power supply feedback path is not required, the high-boost isolation of the present invention The type of dual input power converter can be simplified to the circuit architecture of the second preferred embodiment as shown in FIG. The difference from the first preferred embodiment is the full bridge circuit 1〇3 of the first figure and the unidirectional full bridge circuit 1403 of the fourteenth embodiment, and the seventh switch & Eight switches \, ninth switch & and tenth switch $. Replace with the first diode q, the second diode A, the third diode A, and the fourth diode, and reduce the use of four sets of switch drive signals. In a second preferred embodiment of the high-boost isolated dual-input power converter disclosed in the present invention, the first input voltage source γ and the second voltage source factory 2 can be used by the battery 'supercapacitor, fuel cell, solar cell, DC The wind turbine or AC wind turbine is rectified to a DC power source as a DC power source. When the dual input power supply is an energy source without power storage characteristics, the power supply situation can be divided into two states: single input power supply independent power supply and dual input power supply simultaneously, and the operation modes of the two power supply states are respectively the first and the better. The power supply status of the embodiment is the same, and the system architecture and the erection cost can be simplified. When the dual input power supply is an energy and power storage device that does not have the power storage characteristics, the power supply situation can be divided into three states: single input power supply, independent power supply, The dual input power supply is simultaneously powered and the dual input power supply is respectively powered and charged. The operating modes of the three power supply states are the same as the power supply states of the first preferred embodiment, respectively, and the system architecture and the table β are further simplified. The second preferred embodiment of the dual-input dual-input power converter is characterized in that: the first point has a dual input power mechanism 46 1351806 and a power storage device charging mechanism, and a voltage source of different electrical characteristics can be used as an input. End, jointly raise the voltage level, simplify the structure of multiple sets of converters and then parallel supply, According to the power management requirements and power supply situation, it can be divided into three states: single input power supply independent power supply, dual input power supply and power supply and charging for dual input power supply, and second point, high boost ratio and electrical isolation, use isolation The transformer turns ratio and duty cycle control can obtain high voltage benefits. Thirdly, the conversion efficiency is high. Under the input and output voltage isolation architecture, the low voltage side large current and the high voltage side low current characteristics can be distinguished. The low-cost and high-efficiency power components in the voltage range; the fourth point, the active voltage clamping technology solves the voltage surge problem caused by the leakage inductance of the isolation transformer, and effectively outputs the leakage inductance energy to the DC output circuit; The conduction loss is greatly reduced. The two input power circuits are connected in series. When the converter is operated in the dual-input power supply state, the conduction loss can be greatly reduced. For the clean energy source when the input power source is low voltage and current, Successfully reduce conduction losses and significantly increase conversion efficiency The sixth point is that the input current of the dual input power terminal is continuous, the input power source is presented in the form of DC current source power, and the input current of the smaller chopping wave can be taken out at the power terminal end, which can be effectively applied when the clean energy source is the input power source. Filter out current ripple and avoid damage to clean energy devices, and extend the service life of clean energy devices. The power point of the seventh point 'power semiconductor switch is only related to the DC output voltage and the turns ratio of the isolation transformer. This feature is more suitable for DC input voltage. The application of the power conversion device with a wide range of changes; the eighth point, the one-way full-bridge circuit structure is simple, the 1351806 one-way full-bridge circuit uses only four switches and four diodes, that is, the charging circuit for the power storage device mechanism. In order to further understand the contents of the present invention, the analog waveforms of the following embodiments, the voltage and current codes of the components, please refer to the second figure; this embodiment uses the circuit simulation software ISPICE to verify the high-boost isolation type disclosed in the present invention. The feasibility of the dual input power converter, wherein the first input voltage source is 28 volts low voltage energy, and the second input voltage source F2 uses a 24 volt battery as the power storage device, and the DC output circuit 105 outputs 400 volts DC voltage. The high-boost isolated dual-input power converter component disclosed in the present invention is appropriately selected, the first switch & the second switch < S2, the third switch < S3, the fourth switch, the fifth switch & The sixth switch & and the clamp switch & low voltage side switch selects the MOSFET power switch of the model IRFP260, and the seventh switch of the high voltage side <S7, the eighth switch & the ninth switch <S9, the tenth switch core Using the IGBT power switch of the model IRFM460, the operating frequency of the high-boost isolated dual-input power converter is set to 10 kHz, the first switch $ and the second switch fork Compared with the frequency 20KHz, the detailed implementation of the embodiment of the present specification is as follows: L,: 400 μ Η L2: 200 μ Η 4: 2.4 η · 6.5

Cc : 220 β¥ C, : 660 ^ F C2 · 660 β F C0 : 100 β ¥ 48 1351806 The fifteenth figure shows that the high-boost isolated dual-input power converter disclosed in the present invention has an output power of 400 watts, the first The analog waveform response of the wheeled voltage source γ in the independent power supply state: (a) indicates the waveform of each switch driving signal voltage, which is consistent with the voltage of each switch driving signal given in the waveform of the third figure; (b) represents the first inductor current L The first switching voltage vDwi, the first switching current center &, the third switching voltage, and the third switching current heart illusion, wherein the first inductor current b is continuous, and the first input voltage source has a stable output power of 416 watts. In addition, • before the first switch Α is turned on, the first switching voltage first drops to zero volts, so the first switch conducts the characteristic of zero voltage switching, and the first switch & and the third switch & In the clamp capacitor voltage factory 7, effectively improve the switching voltage surge caused by the leakage inductance of the transformer; (C) shows the clamp capacitor voltage ^^, clamp switch voltage VDS, ":, clamp switch current state And the ideal transformer primary current ^, the clamp capacitor voltage Fcc is fixed, and all low-voltage side switches are clamped to this voltage value when the switch is turned off, the clamp switch current / take redundant before the switch is turned on, the current flows through its parasitic The pole body 'clamp switch' has the characteristic of zero voltage switching when the SC is turned on, and the third switch & and the sixth switch & when the primary side current of the ideal transformer is positive, the fourth switch is passed when the current is negative. & and the fifth switch & after boosting by the transformer, rectifying and supplying power to the DC output circuit 105; (d) indicating the DC output voltage 匕, the seventh switching voltage, the seventh switching current, and the secondary current diagram of the ideal transformer The medium-to-DC output voltage Κ stabilizes the output of 400 volts, and the seventh switch is electrically generated when the secondary side current of the ideal transformer is reduced to zero. 49 1351806 Phenomenon 'This is because the first switch & conduction causes the transformer current to drop to zero. At this time, the seventh switch "s7" and the tenth switch & The cutoff, or the eighth switch & and the ninth switch 4 are turned off, and the reverse recovery current of the parasitic diode on the switch causes the leakage inductance and the parasitic capacitance of the switch to resonate. Figure 16 is a diagram showing the analog waveform response of the second input voltage source factory 2 in an independent power supply state when the output power of the high-boost isolated dual-input power converter of the present invention is 200 watts: (a) indicates the drive signal voltage of each switch The waveform is consistent with the waveforms of the respective switch drive signals given by the waveforms of the fifth figure; (b) represents the second inductor current L, the second switch voltage vm52, the second switch current core^2, and the third switch voltage %~? 3 and the third switching current zDSS3, the second inductor current L is continuous, and the second input voltage source G stabilizes the output power by 212 watts. In addition, before the second switch & conduction, the second switching voltage is lowered first. Up to zero volts, so the second switch has zero voltage conduction characteristics, and the second switch & and the third switch & off voltage are clamped to the clamp capacitor voltage pcc, effectively improving the leakage inductance caused by the leakage inductance of the transformer The wave phenomenon is compared with the analog waveform response of the first-input voltage source in the independent power supply state. Figure 15 (b), the difference is the time period of the inductor current shunt on the timing, but there are Effectively reduce the conduction loss on the switch; (c) indicates the clamp capacitor voltage factory CC, the box switch electric switch, the box switch current / analog and the ideal transformer - the human side current W, the clamp capacitor voltage Fcc is fixed, And all the low-voltage side switches are clamped to this voltage value when the switch is turned off. The clamp switch current 'is negative before the switch is turned on, the current flows through its parasitic diode, and the clamp switch\ turns on with the characteristic of zero voltage switching 1351806, and the ideal transformer When the primary side current k is positive, the third switch 4 and the ', switch' current are negative, and the fourth switch & and the fifth switch & The output circuit 1G5 supplies power; (4) represents the DC output voltage F. The seventh switching voltage v(10)7, the seventh switching current '7 and the secondary side current core 2 of the ideal transformer, the DC output voltage is stably outputted at 400 volts, and the seventh switching voltage v〇ss7 is reduced at the secondary side of the ideal transformer. The phenomenon of voltage oscillation occurs at zero time, because when the first switch $ is turned on, the transformer current is reduced to zero, and then the seventh switch & and the tenth switch '. The leakage inductance and the parasitic capacitance resonance phenomenon caused by the reverse recovery current of the parasitic diode on the switch of the eighth switch \ and the ninth switch A are turned off. The seventeenth circle shows the analog waveform response of the first input voltage source and the second input voltage source in the simultaneous power supply state when the output power of the high-boost isolated dual-input power converter disclosed in the present invention is 600 watts: (a) The waveforms of the drive signal voltages of the switches are matched with the waveforms of the respective switch drive signals given by the waveforms of the seventh waveform; (b) the first inductor current l, the second inductor current t, the first switch voltage νω, ·? The first switching current, the second switching voltage s2, and the second switching current are, wherein the first inductor current k and the second inductor current are continuous, the first input voltage source γ and the second input voltage are continuous The source κ simultaneously stabilizes the output power. At this time, the output power of the first input voltage source G is 4 〇 5 watts, and the output power of the second input voltage source 220 is 220 watts. In addition, the first switch and the second switch are turned on in this operation mode. Each has the characteristics of zero voltage switching, and the first switch & and the second 51 1351806 switch & cut-off voltage are clamped to the clamp capacitor voltage fcc, effectively improving the switch caused by the leakage inductance of the transformer Voltage surge phenomenon, when the second switch "s2" of mode 4, the second switch current « is still zero, the first switch current is reduced, the conduction loss of the switch can be successfully reduced; the clamp capacitor voltage rcc, the clamp switch voltage VI« .SC, clamp switch current ksc and ideal transformer primary current ^, clamp capacitor voltage Kcc is fixed value, and all low-voltage side switches are clamped to this voltage value when cut off, clamp switch current is negative before switch is turned on, current flows through Its parasitic diode, clamp switch & switch with zero voltage switching characteristics, and the ideal transformer primary current 'is a positive value through the third switch & and the sixth switch & The fourth switch \ and the fifth switch &, after being boosted by the transformer, rectify and supply power to the DC output circuit 1〇5; (the sentence indicates the DC output voltage B, the seventh switching voltage π, the seventh switching current, and the ideal transformer II) The secondary current core 2' shows that the DC output voltage is stable at 400 volts, and the seventh switching voltage va$, ·7 is generated when the secondary side current k of the ideal transformer is reduced to zero. The phenomenon of oscillating oscillating, this is because when the first switch ^ or the second switch ^ is turned on, the current of the transformer is reduced to zero, and then the seventh switch is turned off from the tenth switch ^, or the eighth switch\ And the ninth switch S9 is cut off, the reverse recovery current of the parasitic diode on the switch causes the leakage inductance and the switching parasitic capacitance to resonate; (4) represents the third switching voltage ~, the third switching current ", the fourth switching voltage S and The fourth switch current "(' is shown by the third switch current 3 and the fourth switch current is divided by timing, the DC output circuit 105 is powered by the converter, and 52 1351806 and the inductor current can be in the third switch <; s3, the fourth switch < s4, the fifth switch < s5 and the sixth switch < s6 simultaneously turn on, reduce the conduction loss in the form of shunt, and the voltage of the third switch and the fourth switch are clamped to the clamp capacitor Voltage. Figure 18 is a diagram showing the analog waveform response of the first input voltage source γ to the power supply state and the second input voltage source F2 to the state of charge when the output power of the high-boost isolated dual-input power converter of the present invention is 400 watts: ( a) indicating that each switch driving signal voltage waveform 'conforms with each switch driving signal electric pressure waveform given by the ninth waveform waveform timing; (b) indicates that the first inductor current L, the second inductor current, and the first switching voltage are taken 51 The first switching current, the second switching voltage Vd^2, and the second switching current center, 52' are shown by the figure that the first inductor current L is positive, the second inductor current L is negative 'and both are continuous currents The first input voltage source γ stabilizes the output power, and the second input voltage source stores the battery stably at a constant current. At this time, the first input voltage source 6 has an output power of 658 watts, and the second input voltage source & charging power is 201 watts, the first switch & and the second switch & cut-off voltage are all clamped to the clamp capacitor voltage, effectively improving the switching voltage surge caused by the transformer leakage inductance 'in this operating state The second switch & reduces the conduction loss of the switch by synchronous rectification, and has a zero voltage switching characteristic when the switch is turned on; (c) indicates the clamp capacitor voltage Fcc, the clamp switch voltage v, the clamp switch current, and the ideal transformer primary current. ^, the clamp capacitor voltage Fcc is fixed, and all low-voltage side switches are clamped to this voltage value when turned off. In mode 2, the switch current is 'positive'. Power gCc energy is transmitted through the transformer to the DC output circuit 〇5 Power supply, and 53 1351806 in the mode five clamp switch current W is negative before the switch is turned on, the current flows through its parasitic diode, the clamp switch knows that there is zero voltage switching when turned on, and in mode five to mode seven, the clamp switch The current 匕 is negative, and the first inductor current h charges the clamp capacitor cc in this interval; (4) represents the DC output electric grind, the seventh switch voltage core 7, the seventh switch current, and the ideal transformer secondary current ^, The medium-DC output voltage 匕 stabilizes the output of 400 volts, and the seventh switch sings the voltage oscillation when the secondary side current k of the ideal transformer decreases to zero. Because the first switch *^ or the second switch \ is turned on, causing the transformer current to drop to zero, then the seventh switch & and the tenth switch & cut off, or the eighth switch \ and the ninth switch & wear, the reverse recovery current of the parasitic diode on the switch causes the leakage inductance and the switching parasitic capacitance resonance phenomenon; (e) represents the third switching voltage VDS, S3, the second switching current / the current, the fourth switch The voltage and the fourth switch current core are 4, and the third switch current core force and the fourth switch current core are shown in the figure to be separated by timing. The DC output circuit 1〇5 is supplied through the transformer boost, and • the inductor current When the third switch <s3, the fourth switch, the fifth switch <s5, and the sixth switch & are simultaneously turned on, the conduction loss is reduced in a shunt manner, and the third switch & and the fourth switch \off voltage Both are clamped to the clamp capacitor voltage plant. Figure 19 is a diagram showing the analog waveform response of the second input voltage source & in the output power reverse lock state of the high-boost isolated dual-input power converter with a charging power of 200 watts as shown in the present invention: (a) indicating the respective switch driving signals The voltage waveform is consistent with each of the switch drive signal voltage waveforms given by the waveform timing of the twelfth figure; (b) Table 54 1351806 shows the second inductor current b, the second switch voltage V0ii2, the second switch current, the third switch voltage, and the The three-switch current is shown by the figure that the second inductor current is negative, and the battery of the second input voltage source G is stably charged with a constant current. In this operating state, the second switch 4 reduces the switch conduction loss by synchronous rectification, and the switch is turned on. The zero-voltage switching characteristic is adopted, and the voltages of the first switch S and the third switch $ are clamped to the clamp capacitor voltage Fcc, which effectively improves the switching power surge phenomenon caused by the leakage inductance of the transformer; (c) represents the clamped capacitor electric wish Factory cc, system Φ switch voltage v take sc, clamp switch current bs, sc and ideal transformer primary side current W, clamp capacitor voltage rcc is fixed, and All low-voltage side switches are clamped to this voltage value when the switch is turned off. When the clamp switch is turned on, the clamp capacitor Q first supplies power to the second inductor A and the second input voltage source G. At this time, the clamp switch current b is particularly positive, and then the clamp switch is turned on. The current ^ is negative, the output power supply feedback energy charges the clamp capacitor Cc', and the ideal transformer-secondary current ^ is positive value through the fourth switch & and the fifth switch & the current is negative when passing the third switch ^ and the sixth switch ^, the power supply feedback energy is stepped down by the transformer, the second inductor ^ and the second input voltage source 匕 power, (d) represents the DC output voltage 匕, the seventh switching voltage (6), the seventh switch Grab and the ideal transformer secondary side current ~ 2, the DC output voltage 图 feedback voltage is copper volts, DC output is fresh. The feedback power is 212 watts' and the seventh switching voltage, "the phenomenon of voltage shock is generated when the current of the secondary side of the ideal transformer is reduced to zero. This is because when the first switch is turned on, the transformer motor is reduced to zero. Then, the seventh switch ^ and the tenth switch ~ cut 55 1351806, or the eighth switch & and the ninth switch & the reverse recovery current caused by the reverse parasitic diode on the switch Switching parasitic capacitance resonance phenomenon. Figure 20 shows the high-boost isolated two-wheel-in power converter, the circuit simulation conversion efficiency under various operating conditions: (4) indicates the (10) turn rate under the first input power supply state, The first-wheel voltage (four) uses a 28 volt low-voltage power supply, and the DC output voltage [for volts, the most (four) change in this operating state can be (four) 96%; _ shows the second round of human voltage source Κ 2 in the independent power supply state of the power conversion Efficiency 'The second round-in voltage source uses a 24 volt battery' and the DC output voltage 匕 is 400 volts. The maximum conversion efficiency in this operating state can be 94 Λ, (4) the first-round human waste source and the second Input The voltage source is the power conversion efficiency under the simultaneous power supply state, the first input voltage is 28 28 volts low voltage power supply 'the first input power source [use the μ volt battery and fix its output power is 200 watts, and the DC output voltage匕 is _ volt in this operating state, the highest efficiency village is higher than the regulation; (4) with [wheeling voltage source!, power supply state and the second input voltage source [power conversion efficiency under charge state, the first round" Source (four) 28 volt low-voltage power supply, the second input voltage source F2 uses 24 volts glycosides your pool and fixed its charging power is 200 watts, and straight: voltage K is side volts, the highest conversion efficiency can be high in this operating state =) Indicates the second round of power-in (4) power conversion efficiency in the output power supply feedback state, the first power-off μ is used in the power supply 24 volt battery 'and the DC input original feedback is Yang Volt, the highest conversion 56 1351806 efficiency in this operating state It can be higher than 94%; the circuit simulation results show that the power conversion efficiency can be higher than 91% in each operation mode, which can verify the high-boost isolated dual-input power converter disclosed by the present invention. The invention has the characteristics of high power conversion efficiency. Although the present invention has been disclosed in the foregoing preferred embodiments, it is not intended to limit the invention, and various modifications may be made without departing from the spirit and scope of the invention. The scope of protection of the present invention is defined by the scope of the appended claims. [First Description of the Drawings] The first figure shows a high-boost isolated dual-input power converter, a first preferred embodiment The second diagram of the circuit architecture shows the equivalent circuit of the high-boost isolated dual-input power converter. The third diagram shows the first input voltage source P. The voltage-current timing waveform in the independent power supply state shows the first input voltage source. Circuit Operation Mode in Independent Power Supply State The fifth diagram shows the voltage current timing waveform of the second input voltage source G in the independent power supply state. The sixth diagram shows the circuit operation mode of the second input voltage source in the independent power supply state. An input voltage source Κ and a second input voltage source 匕 in a simultaneous power supply state voltage and current timing waveform 57 I351806 eighth round table The first input voltage source γ and the second input voltage source are in a simultaneous power supply state. The ninth diagram shows the first input voltage source factory, and the voltage and current timing waveforms in the power supply state and the second input voltage source in the charging state. Figure 10 shows the circuit operation mode of the first input voltage source γ in the power supply state and the second input voltage source κ2 in the charging state. Figure 11 shows the equivalent circuit of the high-boost isolated dual-input power converter with the output power feedback state. Figure 12 shows the voltage and current timing waveform of the second input voltage source 输出 in the output power supply feedback state. Figure 13 shows the second input voltage source & circuit operation mode in the output power supply feedback state. Figure 14 shows high boost isolation. Type Dual Input Power Converter, Circuit Architecture of Second Preferred Embodiment • Figure 15 shows a high boost isolated dual input power converter, a first input voltage source F; an analog waveform response in an independent power supply state. The six figures show the high-boost isolated dual-input power converter, and the second input voltage source G is in the independent power supply. In response to the seventeenth diagram, the high-boost isolated dual-input power converter, the first input voltage source K and the second input voltage source are in the simultaneous power supply state of the analog waveform response 58 1351806. Figure 18 shows the high-boost isolation type. The dual input power converter, the first input voltage source γ is in the power supply state, and the second input voltage source κ2 is in the charging state. The analog waveform response is shown in FIG. 19 to represent the high-boost isolated dual-input power converter and the second input voltage source. The analog waveform response in the output power feedback state is shown in the twentieth diagram. The high-boost isolated dual-input power converter has a circuit analog conversion efficiency under various operating conditions. [Main component symbol description] 101: First power supply circuit 102: Two power supply circuit 103: full bridge circuit 104: active clamp circuit 105: DC output circuit 1403: one-way full bridge circuit F1: first input voltage source F2: second input voltage source 匕: DC output voltage A: An inductor 4: a second inductor • s1: a first switch 59 1351806 a second switch a third switch a fourth switch a fifth switch a sixth switch a seventh switch «V eighth Switch ninth switch s1Q: tenth switch clamp switch heart 1: first power switch \2: second power switch 7;: first switch drive signal Γ 2: second switch drive signal Γ 3: third switch drive signal Γ 4: Four switch drive signal 7;: fifth switch drive signal 7;: sixth switch drive signal Γ7: seventh switch drive signal Γ8: eighth switch drive signal 7; ninth switch drive signal 1351806 7; : Tenth switch drive signal I: clamp switch drive signal 7^: first power switch trigger signal 2: second power switch trigger signal 7;: isolation transformer isolation transformer primary side: isolation transformer secondary side «: isolation transformer匝Number ratio Ce: clamp capacitor ς: first capacitor C2: second capacitor C. : DC output capacitor Λ. : DC output load A: first diode d2: second diode d3: third diode d4: fourth diode 61

Claims (1)

1351806 X. Applying for a patent garden: A high-boost isolated two-input power converter comprising a -first-electrode circuit: the circuit consists of a first input voltage source, a power switch, a first capacitor, a first inductor, and a The connection mode is that the first input voltage source is connected in series with the first power switch, and then the first capacitor is connected in series, and the first capacitor is connected in series with the first inductor and the first switch; the main function of the first power circuit is through the first switch Switching, converting the first input voltage source energy into the first inductor current, which is presented in the form of current source power; the first power circuit · the circuit consists of a second input voltage source, a power switch, a second capacitor, The second inductor and the second switch are formed by connecting the second input voltage source to the second power switch, and then connecting the first capacitor in series, and the second capacitor is connected in series with the second inductor and the second The main function of the first power supply circuit is to convert the second input voltage source electric energy into the second inductor current through the switching of the second switch, and present it as a current source electric energy; the full bridge circuit: the circuit is composed of one Three switches, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, and an isolation transformer; The I voltage transformer includes an isolation transformer—the secondary side and the secondary side of the isolation transformer; the connection mode is a general full bridge structure; the active system circuit: the circuit is composed of a clamp switch and a clamp capacitor, and the connection mode is a clamp switch. Serial connection clamp capacitor; DC output circuit. This circuit consists of DC output capacitor and DC wheel load. It is a DC high-impedance flow line; the connection method is DC output capacitor parallel DC output load; 62 1351806 This converter is characterized by : The first point is a two-input power bidirectional conversion mechanism. The voltage source with different electrical characteristics can be used as an input terminal to jointly raise the voltage level, simplify the structure of multiple sets of converters and then parallel supply, and according to power management. The power supply situation can be divided into four states: single input power supply, independent power supply, dual input power supply, and dual input power supply. With the charging and output power feedback, the second point, with high boost ratio and electrical isolation characteristics, using the isolation transformer turns ratio and duty cycle control, can obtain high voltage gain; the third point, high conversion efficiency, at the input and output voltage Under the isolation structure, the high-voltage side high-current and high-voltage side low-current characteristics are strictly distinguished, and low-cost high-efficiency power components suitable for the voltage range can be selected respectively. Fourthly, the active voltage clamping technology solves the leakage inductance caused by the isolation transformer. Voltage surge problem, and the leakage inductance energy is effectively output to the DC output circuit; the fifth point has a significant reduction in conduction loss, and the two input power circuits are connected in series, when the converter operates on the dual input power supply simultaneously, The conduction loss can be greatly reduced. 'When applied to clean power with low voltage and high current for input power, the conduction loss is successfully reduced and the conversion efficiency can be greatly improved. The sixth point is that the input current of the dual input power supply is continuous, and the input power is DC. The current source is in the form of electric energy and can be taken out at the power supply The input current of Xiaobo wave can effectively filter out current ripple and avoid damage to clean energy devices and extend the service life of clean energy devices when applied to clean energy input power. The seventh point is that the voltage of the power semiconductor switch is only affected. The DC output voltage is related to the turns ratio of the isolation transformer. This feature is more suitable for power conversion applications where the DC input voltage varies widely. 2. The high-boost isolated dual-input power 63 converter as described in the scope of claim 2, wherein the first power switch and the second power switch function to complete the first input voltage source or the first according to power management requirements Two input voltage sources are supplied or cut away. The high-boost isolated dual-input power converter according to claim 1, wherein the first input voltage source and the second voltage source are a battery, a super capacitor, a fuel cell, a solar cell, a DC wind generator, or The AC wind turbine is rectified to a DC power supply as a DC power supply. ^ The high-boost isolated double-input power converter as described in the first application of the patent scope. The function of the full-bridge circuit is to switch through the full-bridge circuit. Switching and isolating the transformer turns ratio, according to different power supply states, the energy of the first input voltage source or the second input voltage source may be charged, and the DC output capacitor of the DC output circuit is charged and supplied with energy to the DC output load, or It is the energy that outputs the DC circuit power feedback, and charges the input power with the power storage characteristics. The high-boosting isolated dual-input power converter according to claim 1, wherein the active clamping circuit functions to absorb the first inductor current or the second inductor when the first switch or the second switch is worn. The difference between the current and the primary current of the ideal transformer can effectively clamp the switching voltage to avoid the occurrence of a surge phenomenon, and solve the problem of leakage inductance of the ideal transformer. A high-boost isolated two-input power converter includes a first power circuit. The circuit includes a first input voltage source, a first power switch, a first capacitor, a first inductor, and a first The switch comprises: the first input voltage source is connected in series with the first power switch, and then the first capacitor is connected in series with the first capacitor and the first inductor is connected in series; 1351806 main function of the first power circuit Through the first-off (four), the first input electric dust source electric energy is converted into the first “inductance current, which is presented in the form of current source electric energy; the first power supply circuit: the circuit is composed of a second input voltage source and a second power switch, a second capacitor, a second inductor, and a second switch The second power switch is connected in series with the second power switch, and the second capacitor is connected in series. The second capacitor is connected in series with the second inductor and the second switch. The main function of the second power circuit is Through the switching of the second switch, the second input electric source energy is converted into the second inductor current, which is presented in the form of current source electric energy; - one-way full bridge circuit: the circuit is composed of a third switch, a fourth The switch, the fifth switch, the sixth switch, a first diode, a second diode, a third diode, a fourth diode, and an isolation transformer, the isolation transformer includes Isolation transformer side and isolation transformer secondary side; connection mode is general full bridge structure; - active clamp circuit: this circuit is composed of a clamp switch and a clamp capacitor; the connection mode is clamp switch series Clamping capacitor; - DC output circuit: This circuit consists of DC output capacitor and DC output load 'as DC high voltage bus; connection mode is DC output capacitor parallel DC output negative The characteristics of this converter are: the first point 'with two-wheeled person power mechanism and the power storage device charging mechanism' can be used as a voltage source with different electrical characteristics as the input terminal to jointly raise the voltage level 'simplified multi-group converter The structure of voltage and parallel power supply can be divided into three states according to power management requirements and power supply conditions: single input power supply independent power supply, dual input power supply off supply f and dual input power supply separately supply and charge; High boost ratio and electrical isolation characteristics, high voltage gain can be obtained by using the transformer ratio and duty cycle control of 65 1351806. The third point is 'high conversion efficiency'. Under the input and output voltage isolation architecture, the low voltage side is strictly distinguished. Current, high-voltage side low-current characteristics, respectively, can choose low-cost high-efficiency power components suitable for voltage range; Fourth, active voltage clamping technology solves the voltage surge problem caused by leakage inductance of isolation transformer, and will leak inductance Energy is effectively output to the DC output circuit; the fifth point has a significant reduction in conduction loss characteristics, two inputs The source circuits are connected in series. When the converter is operated in a dual-input power supply state, the conduction loss can be greatly reduced. When applied to a clean energy source with low voltage and high current input power, the conduction loss is successfully reduced and can be greatly improved. Conversion efficiency; sixth point, the input current of the dual input power supply is continuous, the input power is presented in the form of DC current source power, and the input current of the smaller chopping wave can be taken out at the power supply end, when applied to the clean energy source as the input power source It can effectively filter out current ripple and avoid damage to clean energy devices and prolong the service life of clean energy devices. The seventh point is that the voltage of the power semiconductor switch is only related to the DC output voltage and the resistance ratio of the isolation transformer. This feature is more suitable. The application of the power conversion device with a wide range of DC input voltage variation; the eighth point, the one-way full-bridge circuit structure is simple, and the one-way full-bridge circuit uses only four switches and four diodes, that is, the power storage device is charged. The mechanism of the loop. The high-boosting isolated dual-input power converter according to claim 6, wherein the first power switch and the second power switch function to complete the first input voltage source or the second according to the power supply requirement The purpose of the input voltage source is to supply or cut off. 8_ The high-boost isolated dual-input power supply 66 1351806 as described in the patent scope, the first input voltage source and the second voltage source can be super-accumulated by the battery. Electricity, fuel cells, solar cells, DC wind turbines or AC wind turbines are rectified into DC power supplies as DC power supplies. 9. The high-boost isolated dual-input power converter as described in claim 6 wherein the function of the full-bridge circuit is to switch the switching and isolation transformers of the full-bridge circuit. The state 'characterizes the energy of the first input voltage source or the second input voltage source, and sequentially charges the DC output capacitor of the DC output circuit and supplies energy to the DC output load. 10. The high-boost isolated dual-input power converter as described in the scope of the patent application, wherein the function of the active clamping circuit is to absorb the first inductor current or the second when the first switch or the second switch is turned off. The difference between the inductor current and the primary current of the ideal transformer can effectively clamp the switching voltage to avoid the occurrence of glitch and solve the problem of leakage inductance of the ideal transformer.