The multi-path isolated power device switch drive module of power conversion controller
Technical field
The invention belongs to power electronics field, relate in particular to high-frequency inversion, frequency control, power management and sun grid-connected system, specifically a kind of multi-path isolated power device switch drive module of power conversion controller.
Background technology
Energy-saving and emission-reduction and environmental protection are the stern challenges that mankind nowadays society faces, continuous consumption along with the energy, the reserves of tellurian non-renewable energy resources are fewer and feweri, the problem of environmental pollution producing after simultaneously traditional using energy source is also more and more serious, so the research and development of non-polluting energy sources are imperative.In recent years, as wind energy, the solar energy of non-polluting energy sources, be more and more subject to pursuing of people, it usings the material that naturally exists as power source, and application can not produce environmentally harmful material and enjoy attention later.Especially solar energy receives increasing people's concern more, therefore, also more and more to the research of solar energy and application in recent years.
Using solar power generation at present as Main Topics, people have basically formed scale to the research of the development and utilization of solar power generation, solar power generation is also first converted into power storage by solar energy originally, and then utilize the Evolution Modes that battery is load supplying to become solar power generation to be directly incorporated in network system, for load provides the pattern of electric energy, make the utilization of solar energy more direct, also more abundant.And need processing very much in solar energy is connected to the grid the process of system, needing a transform controller that solar energy is converted to does not affect civil power, and can incorporate a kind of energy that civil power is load supplying.What in prior art, commonly use is Z source transform controller, in its application process, need by the grid of the pwm signal driving power pipe of DSP or the generation of other chips, and the direct grid of driving power pipe of the pwm signal that the chip such as DSP produces, therefore need between dsp chip output and the grid of power tube, add a driving, and existing driving is for to carry out by electric capacity or diode reliable unlatching and the reliable turn-off that clamper is carried out guaranteed output pipe, as MOSFET, IGBT class MOS type power tube is exactly the important devices that is applied to power conversion and management, their whole driver module is integrated in an one chip thick-film type integrated circuit, in actual use, MOSFET, IGBT class MOS type power tube usually causes it to burn because drive integrated circult sends wrong control signal, particularly drive integrated circult and IGBT are integrated on the circuit board of a small space, make electromagnetic interference become very serious, often there is mistake in the pulse signal that is used in control IGBT, thereby cause burning or short circuit of IGBT, and can only solve fault by changing the mode of IGBT or integrated circuit, visible, in prior art, the driving of power tube is existed to area occupied large, number of elements is many, circuit cost is high, the shortcomings such as reliability is low.
In addition, under high and medium power occasion, du/dt, di/dt that switching tube is opened shutoff are all very high, control and drive circuit shield in bad situation can produce very large interference signal, under the large electric current of strong perception, turn-off driving and can cause the high pressure burr on DC bus, be easy to the weak electric signals such as control circuit to cause interference, probably make driver module lose efficacy and burn out IGBT module, the safe operation of serious threat power inverter.
Summary of the invention
In order to solve the above problems, the invention provides a kind of multi-path isolated power device switch drive module of power conversion controller, can guaranteed output pipe fast, reliable conducting, and power tube grid voltage across poles is stable.
For achieving the above object, the technical solution adopted in the present invention is as follows:
A multi-path isolated power device switch drive module for power conversion controller, it comprises:
For external ac power source is carried out rectification low frequency full bridge current rectifying and wave filtering circuit, for the voltage after rectification being become to the high voltagehigh frequency pulsed power signal of pulse signal, produce circuit, the impulse level translation circuit that is electronegative flat output for the low transition of common ground multiplex pulse signal that power conversion controller is sent, and isolated DC level power supply circuits that are rectified into multi-voltage DC level for high voltagehigh frequency pulsed power signal being produced to the pulse signal of circuit generation; Wherein:
The signal input part of described low frequency full bridge current rectifying and wave filtering circuit connects the AC power of the network that generates electricity by way of merging two or more grid systems, its signal output part connects the signal input part that high voltagehigh frequency pulsed power signal produces circuit, high voltagehigh frequency pulsed power signal produces the signal input part of the signal output part connection isolated DC level power supply circuits of circuit, the signal output part of isolated DC level power supply circuits connects the signal input part of impulse level translation circuit, and the signal pulse being sent by power conversion controller also connects the signal input part of impulse level translation circuit simultaneously.
As limitation of the invention
:described low frequency full bridge current rectifying and wave filtering circuit comprises by the first diode, the second diode, the first rectifier bridge that the 3rd diode and the 4th diode form (simultaneously also comprising input antisurge device and electromagnetism interference filter), the input of described the first rectifier bridge is connected one end of conjugation inductance by piezo-resistance and the parallel circuits of the first capacitor, the other end of conjugation inductance is connected external ac power source by the first inductance with the parallel circuits of the second capacitor, after the output of the first rectifier bridge the 3rd capacitor in parallel as the output of low frequency full bridge current rectifying and wave filtering circuit.
As another kind of the present invention is limited: described high voltagehigh frequency pulsed power signal produces the half-bridge driver that circuit comprises the floating current potential driving of band, the first pin of described half-bridge driver connects the output of low frequency full bridge current rectifying and wave filtering circuit by the first resistance, also by the 5th diode, connect the 8th pin of self simultaneously; The second pin of described half-bridge driver connects the three-prong of self by the second resistance, simultaneously also by the series circuit ground connection of the second resistance and the 4th capacitor; The 4th pin ground connection of described half-bridge driver; The 5th pin of described half-bridge driver connects the grid of the first power tube, the source ground of the first power tube by the 3rd resistance; The 7th pin of described half-bridge driver connects the grid of the second power tube by the 4th resistance, the source electrode of the second power tube connects the drain electrode of the first power tube, and the drain electrode of the second power tube connects the first pin of half-bridge driver; The 6th pin of described half-bridge driver connects the intermediate node that the first power tube is connected with the second power tube, as high voltagehigh frequency pulsed power signal, produces one of them end points of circuit output end; The 8th pin of described half-bridge driver connects the 6th pin of self by the 5th capacitor; Between the grid of the source electrode of described the first power tube and the second power tube, be serially connected with the series circuit that the 6th capacitor and the 7th capacitor form, and the 6th capacitor is connected intermediate node as another end points of high voltagehigh frequency pulsed power signal generation circuit output end with the 7th capacitor.
As limitation of the invention further
:the impulse type DC level generation module of described multi-voltage DC level comprises the first transformer, the former limit input of described the first transformer connects the output that high voltagehigh frequency pulsed power signal produces circuit, the output of the first transformer connects the input of the second rectifier bridge, the output of the second rectifier bridge is connected input and the earth terminal of three terminal regulator through the second inductance and the parallel circuits of the 8th capacitor, output cross-over connection the 9th capacitor of three terminal regulator is exported the first direct voltage, simultaneously at the first direct voltage two ends cross-over connection the 5th resistance of output and the series circuit of voltage-stabiliser tube formation, and earth terminal and the 5th resistance at three terminal regulator, the connected intermediate node of voltage-stabiliser tube is exported the second direct voltage, two ends cross-over connection the tenth capacitor at the second direct voltage of exporting.
As further limiting of the present invention
:described impulse level translation circuit comprises the voltage changer that pulse signal that power conversion controller is sent converts, the input of described voltage changer connects the pulse signal that power conversion controller sends, output connects the base stage of the first transistor by the 7th resistance, also by the 8th resistance, connect the first direct voltage of isolated DC level power supply circuits output simultaneously; The first direct voltage that the collector electrode of described the first transistor connects the output of isolated DC level power supply circuits by the 9th resistance also connects the base stage of the first complementary emitter follower simultaneously; And the output of the common emitter of the first complementary emitter follower, the waveform consisting of the tenth resistance, the 11 resistance, the 6th diode and the 11 capacitor improves the base stage that circuit is connected to the second complementary emitter follower, the common emitter output of described the second complementary emitter follower is as one of them output of impulse level translation circuit, and the second direct voltage of isolated DC level power supply circuits output is as another output of impulse level translation circuit.
As the restriction to voltage changer
:described voltage changer comprises photoelectrical coupler, and the input of described photoelectrical coupler connects by the 6th resistance the pulse signal that power conversion controller sends.
As the another kind to voltage changer, limit
:described voltage changer comprises the second transformer, the former limit input of described the second transformer directly connects the pulse signal that power conversion controller sends, the secondary output of described the second transformer is when connecting follow-up the first transistor, the first complementary emitter follower, the second complementary emitter follower, also pass through the 7th diode, the 8th diode, the 9th diode, and the series circuit of the 12 capacitor connects the first direct voltage of isolated DC level power supply circuits output.
Owing to having adopted above technical scheme, the present invention can reach following technique effect:
(1) modular structure of the present invention is simple, easy to connect, structure is small and exquisite, reliability is high, can good the opening and turn-offing of guaranteed output pipe, and do not produce hangover, wherein when power tube conducting, enough large firing current is provided, make the source capacitance quick charge of power tube, the fast conducting of guaranteed output pipe, and the unlikely generation higher-order of oscillation; In power tube conduction period, can guaranteed output tube grid between voltage stable, make the reliable conducting of power tube; And the moment of turn-offing at power tube, the present invention can provide the Low ESR discharge path of the negative positive voltage of band, makes the grid capacitance electric discharge of power tube, avoids power tube to be interfered and to mislead at blocking interval.
(2) structure of the high flat pulse power signal generation of high pressure of the present invention circuit can be selected arbitrarily single module according to the size of the power in circuit, or multimode series connection/form in parallel is powered, for example can be for the power semiconductor in different link positions in power conversion and management circuit be as MOSFET, IGBT class MOS type power tube, provide isolation reliable multichannel driven management, its module drive electric current can reach 20A, operating frequency is from direct current to 500KHZ, duty ratio is any, guaranteed output pipe work is simultaneously reliable and stable, being applicable to 1KW controls to the complicated power of 1MW,
(3) the present invention adopts pulse transformer, optocoupler, optical fiber connector xegregating unit to form main circuit and control circuit, and wherein Sing plus is transformer coupled realizes best impulsive synchronization; And optocoupler, the optical fiber connector can be realized the long-distance transmissions of pwm control signal, time delay is little and can eliminate the interference from device for power switching, and this drive circuit drives signal output processing from the signal of photo-electroluminescence pipe input to become, when equipment yarn system breaks down, can export a disabling signal to the control section of system simultaneously, by control section, stopped the output of whole pwm signals, turn-off the safety that all IGBT pipes guarantee yarn system.
In sum, the present invention is simple in structure, stable and reliable for performance, can provide good driving for power conversion controller.
The present invention is adapted at carrying out various Application of composite in half-bridge, full-bridge, three-phase bridge, many level topological circuit and the management circuit in frequency control.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the embodiment of the present invention;
Fig. 2 is the circuit theory diagrams of embodiment of the present invention medium and low frequency full-bridge rectification filter circuit;
Fig. 3 is the circuit theory diagrams that embodiment of the present invention mesohigh high-frequency impulse power signal produces circuit;
The circuit theory diagrams of isolated DC level power supply circuits in Fig. 4 embodiment of the present invention;
In Fig. 5 embodiment of the present invention, facilitate the circuit theory diagrams of the multi-set isolation type DC level power supply circuits series connection of high-power applications connection;
The circuit theory diagrams of the multi-set isolation type DC level power supply circuits parallel connection that in convenient in Fig. 6 embodiment of the present invention, power application connects;
In Fig. 7 embodiment of the present invention, facilitate the circuit theory diagrams of single group of type multi-set isolation type DC level power supply circuits of 500W to 10KW power application connection;
The circuit theory diagrams of the imported impulse level translation of optocoupler circuit in Fig. 8 embodiment of the present invention;
The circuit theory diagrams of the imported impulse level translation of pulse transformer circuit in Fig. 9 embodiment of the present invention;
Figure 10 is the circuit theory diagrams of the present embodiment while being applied to photovoltaic Z source transform controller.
Embodiment
the multi-path isolated power device switch drive module of embodiment power conversion controller
The present embodiment is a kind of multi-path isolated power device switch drive module of power conversion controller, and its concrete structure, with reference to Fig. 1, comprising:
(1) low frequency full bridge current rectifying and wave filtering circuit, for the AC power of grid-connected system output is carried out to rectification, its concrete structure as shown in Figure 2, comprises the first rectifier bridge consisting of the first ~ four diode D1 ~ D4.
The input of the first rectifier bridge is by piezo-resistance U
rthe one end that is connected conjugation inductance L with the parallel circuits of the first capacitor C1, the other end of conjugation inductance L is connected the AC power of grid-connected photovoltaic system output with the parallel circuits of the second capacitor C2 by the first inductance L 1; After the 3rd capacitor C3 of the output of the first rectifier bridge parallel connection simultaneously, as the output of low frequency full bridge current rectifying and wave filtering circuit, output voltage is designated as V
dc.
(2) high voltagehigh frequency pulsed power signal produces circuit, and for the voltage after rectification is become to pulse signal, its concrete structure as shown in Figure 3, comprises half-bridge driver U1.
Half-bridge driver U1 can select IR company or the floating current potential of the similar band of application circuit drives with it half-bridge driver IR215* series, and the present embodiment adopts IR2153.
The first pin V of half-bridge driver U1
cCthe V that connects the output of low frequency full bridge current rectifying and wave filtering circuit by the first resistance R 1
dc, also by the 5th diode D5, connect the 8th pin V of self simultaneously
b;
The second pin R of half-bridge driver U1
tthe three-prong CT that connects self by the second resistance R 2, simultaneously also by the series circuit ground connection of the second resistance R 2 and the 4th capacitor C4;
The 4th pin C of half-bridge driver U1
omground connection;
The 5th pin L of half-bridge driver U1
othe grid that connects the first power tube M1 by the 3rd resistance R 3, the source ground of the first power tube M1;
The 7th pin H of half-bridge driver U1
othe grid that connects the second power tube M2 by the 4th resistance R 4, the source electrode of the second power tube M2 connects the drain electrode of the first power tube M1, and the drain electrode of the second power tube M2 connects the first pin V of half-bridge driver U1
cC;
The 6th pin V of half-bridge driver U1
sconnect the intermediate node that the first power tube M1 is connected with the second power tube M2, and as high voltagehigh frequency pulsed power signal, produce an end points of circuit output end.
And the 8th pin V of half-bridge driver U1
bthe 6th pin V that connects self by the 5th capacitor C5
s; Between the grid of the source electrode of the first power tube M1 and the second power tube M2, be serially connected with the series circuit that the 6th capacitor C6 and the 7th capacitor C7 form, and the 6th capacitor C6 is connected intermediate node as another end points of high voltagehigh frequency pulsed power signal generation circuit output end with the 7th capacitor C7.Be the 6th pin V of half-bridge driver U1
sconnect the intermediate node that the first power tube M1 is connected with the second power tube M2, the intermediate node output voltage being connected with the 7th capacitor C7 with the 6th capacitor C6 is two outputs that high voltagehigh frequency pulsed power signal produces circuit, is designated as V
oUT.
(3) isolated DC level power supply circuits, are rectified into multi-voltage DC level for high voltagehigh frequency pulsed power signal being produced to the pulse signal of circuit generation, and its concrete structure as shown in Figure 4, comprises the first transformer T1.
The former limit input of the first transformer T1 connects the output that high voltagehigh frequency pulsed power signal produces circuit, connects power supply V
oUTthe output of the first transformer T1 connects the input of the second rectifier bridge (structure of the second rectifier bridge is identical with the first rectifier bridge), the output of the second rectifier bridge is connected input and the earth terminal of three terminal regulator U2 through the second inductance L 2 and the parallel circuits of the 8th capacitor C8, output cross-over connection the 9th capacitor C9 of three terminal regulator U2 exports the first direct voltage, is designated as V
c1, the first direct voltage V simultaneously exporting
c1the series circuit that two ends cross-over connection the 5th resistance R 5 and voltage-stabiliser tube DW form, and export the second direct voltage at the earth terminal of three terminal regulator U2 with the intermediate node that the 5th resistance R 5, voltage-stabiliser tube DW are connected, be designated as V
c2, at the second direct voltage V of output
c2two ends cross-over connection the tenth capacitor C10.
The present embodiment is different according to driven power, to isolated DC level power supply circuits, can adopt following several mode to drive:
1. when the power of demand motive is when to be 50KW-1000KW high-power, adopt as the mode of Fig. 5 series connection, the identical isolated DC level power supply circuits of many groups are set, wherein the low-pressure end of the high-pressure side of first group of transformer and last group transformer is free end, as input, the low-pressure end of first group of transformer connects the high-pressure side of second group of transformer, the low-pressure end of second group of transformer connects the high-pressure side of the third transformer, by that analogy, the low-pressure end of second from the bottom group of transformer connects the high voltage end of last group transformer, be about to the former limit input series connection of transformer in every group.
2. when the power of demand motive is in 5KW-100KW during power, adopt as the mode of Fig. 6 parallel connection, the identical isolated DC level power supply circuits of many groups are also set, and wherein the former limit input of every group of transformer is free end, and the former limit input of transformer is in parallel.
3. when the power that needs to start is 500W-10KW, adopt mode as shown in Figure 7, a former limit input is set, and a plurality of identical secondary outputs are set, the connecting circuit of the first transformer secondary output described in the isolated DC level power supply circuits that provide in the present embodiment is provided the follow-up connecting circuit of each secondary output.
(4) impulse level translation circuit, for the low transition of common ground multiplex pulse signal that power conversion controller is sent, be that (what the present embodiment provided is that the signal that the power conversion controller in solar grid-connected electricity generation system is sent is processed in electronegative flat output, therefore what power conversion controller adopted is photovoltaic Z source transform controller), it comprises the voltage changer that pulse signal that power conversion controller is sent converts.
Voltage changer can adopt photoelectrical coupler OC, also can adopt the second transformer T2.The present embodiment adopts photoelectrical coupler OC to realize, physical circuit is as shown in Figure 8: the light-emitting diode input of photoelectrical coupler OC connects by the 6th resistance R 6 pulse signal that power conversion controllers send, the output of the phototriode of photoelectrical coupler OC connects the base stage of the first transistor Q1 by the 7th resistance R 7, also by the 8th resistance R 8, connect the first direct voltage V of isolated DC level power supply circuits output simultaneously
c1; The collector electrode of described the first transistor Q1 connects the first direct voltage V of isolated DC level power supply circuits output by the 9th resistance R 9
c1also connect the base stage of the first complementary emitter follower simultaneously, and the output of the common emitter of the first complementary emitter follower, the waveform consisting of the tenth resistance R the 10, the 11 resistance R 11, the 6th diode D6 and the 11 capacitor C11 improves the base stage that circuit is connected to the second complementary emitter follower, the common emitter output of described the second complementary emitter follower is as one of them output of impulse level translation circuit, the second direct voltage V of isolated DC level power supply circuits output
c2as another output of impulse level translation circuit, the second direct voltage V that the common emitter output of two complementary emitter followers and isolated DC level power supply circuits are exported
c2the common output as impulse level translation circuit in the present embodiment, for driving the power tube that will drive.
The first complementary emitter follower comprises transistor seconds Q2, the 3rd transistor Q3, and wherein the base stage of transistor seconds Q2 connects the base stage of the 3rd transistor Q3, and the collector electrode of transistor seconds Q2 directly connects the first direct voltage V
c1the emitter of transistor seconds Q2 connects the collector electrode of the pipe Q3 of San collective, the grounded emitter of the 3rd transistor Q3, and the intermediate node that transistor seconds Q2 emitter is connected with the collector electrode of the 3rd transistor Q3 is connected the base stage of the second complementary emitter follower by the 11 resistance R 11, at the 11 resistance R 11 two ends, be parallel with the parallel circuits that the tenth resistance R 10 and the 6th diode D6 form simultaneously.
And the second complementary emitter follower comprises the 4th transistor Q4 and the 5th transistor Q5, the base stage of described the 4th transistor Q4 connects the base stage of the 5th transistor Q5, and the collector electrode of the 4th transistor Q4 directly connects the first direct voltage V
c1, the emitter of the 4th transistor Q4 connects the collector electrode of the 5th transistor Q5, the grounded emitter of the 5th transistor Q5, and the 11 capacitor C11 is connected between the base stage and ground of the second complementary emitter follower.
And while utilizing the second transformer T2 as voltage changer, structure is as shown in Figure 9: the former limit input of the second transformer T2 connects the pulse signal that power conversion controller (being photovoltaic Z source transform controller) sends, the circuit connecting after the output of the mode that secondary output connects and the phototriode of photoelectrical coupler OC is identical, all by the 7th resistance R 7, the 8th resistance R 8, the first transistor Q1, the 9th resistance R 9, the first complementary emitter follower, the tenth resistance R 10, the 6th diode D6, the 11 resistance R 11, the 11 capacitor C11, and the circuit of the second complementary emitter follower formation, difference is: the low-voltage end of the secondary output of the second transformer T2 is also by the 7th diode D7, the 8th diode D8, the 9th diode D9, and the series circuit of the 12 capacitor C12 formation connects the first direct voltage V
c1.
The embodiment of the present embodiment is as shown in figure 10: the AC power of solar energy grid-connected photovoltaic system output is directly inputted into low frequency full bridge current rectifying and wave filtering circuit, then after rectification, export to high voltagehigh frequency pulsed power signal and produce circuit, the output of pulse signal producing is to multi-set isolation type DC level power supply circuits, wherein the structure of every group of isolated DC level power supply circuits is all identical, be the structure providing in Fig. 4, and specifically utilize Fig. 5, Fig. 6, or the form shown in Fig. 7, need to select according to driven power; And impulse level translation circuit arranges and the corresponding number of isolated DC level power supply circuits, wherein impulse level translation circuit carries out translation by the pulse signal of photovoltaic Z source power transform controller output, obtain negative pulse, then output as a whole together with the signal of signal and the isolated DC level power supply circuits of output output, the grid of driving power pipe.