CN104638945A - IGBT (insulated gate bipolar translator) serial inverting medium-frequency power supply device - Google Patents
IGBT (insulated gate bipolar translator) serial inverting medium-frequency power supply device Download PDFInfo
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- CN104638945A CN104638945A CN201510096903.9A CN201510096903A CN104638945A CN 104638945 A CN104638945 A CN 104638945A CN 201510096903 A CN201510096903 A CN 201510096903A CN 104638945 A CN104638945 A CN 104638945A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53873—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to an IGBT (insulated gate bipolar translator) serial inverting medium-frequency power supply device, which comprises an IGBT serial inverting circuit, a rectifying main circuit, a drive power supply circuit, a voltage controlled oscillating circuit, a rectifying pulse forming circuit and a protective signal circuit, which are electrically connected with one another. The IGBT serial inverting medium-frequency power supply device is high in power factor, small in harmonic pollution, small in circuit loss, low in power consumption and high in melting rate; energy sources are saved; the pollution to a power grid and the environment is avoided.
Description
Technical field
The present invention relates to a kind of IGBT series resonant inverter intermediate frequency power supply device, belong to frequency-changing and current transforming technology and casting technology field.
Background technology
Along with induction heating application day by day constantly expands, and the development of power semiconductor device technology, simultaneously for response national energy-saving reduces discharging the call of policy, intermediate frequency induction heating power supply forward is energy-conservation, quick, develop without harmonic wave interference radiating way.In control system, be then turn to Digital Control to develop by analogue enlargement, to improve integrated level and the stability of control system; In Based Intelligent Control, by the automatic control equipment such as PLC and configuration software, progressively realize the intellectuality of complete equipment; In inversion form, then developed to series resonant inverter aspect by parallel inverter, to improve output voltage, reduce mesh current, reduce line loss.
The fusing form that current domestic foundry industry adopts is two kinds substantially, and one is adopt coke cupola melting, and two is adopt traditional thyristor intermediate frequency electric source in parallel (KGPS) fusing; Coke cupola melting formal cause inefficiency, energy waste is serious, environmental pollution is serious, and is difficult to control the shortcomings such as casting quality, has been prohibitted the use by country at present; Thyristor intermediate frequency electric source in parallel adopts pressure regulation Power Regulation because of it, load adopts parallel resonance mode, so its power factor can not remain at more than 0.93, during low power run, power factor is then lower, harmonic pollution is serious, current distortion is higher, and parallel inverter is a kind of current mode inversion in addition, and the large line loss of voltage low current is serious.These two kinds of firing equipment inefficiencys, energy waste is serious, to electrical network and environmental pollution serious.
Summary of the invention
The technical problem to be solved in the present invention is for above deficiency, there is provided that a kind of power factor is high, harmonic pollution is little, line loss is little, the IGBT series resonant inverter intermediate frequency power supply device that power consumption is low, burn-off rate is fast, has saved the energy, has avoided the pollution to electrical network and environment.
For solving above technical problem; the present invention is by the following technical solutions: a kind of IGBT series resonant inverter intermediate frequency power supply device, comprises the IGBT Serial inverting circuit of electrical connection, rectification main circuit, driving power circuit, Voltage-Controlled oscillation circuit, commutating pulse form circuit and guard signal circuit.
Described rectification main circuit comprises inductance TA, inductance TB and inductance TC, the one termination circuit breaker of inductance TA, inductance TB and inductance TC, the other end of inductance TA connects the positive pole of the positive pole of rectifier diode D7, one end of electric capacity C7 and diode D1 respectively, and the other end of electric capacity C7 connects the negative pole of rectifier diode D7 through resistance R1.
The negative pole of described diode D1 connects the negative pole of rectifier diode D7 through resistance Ra.
The other end of described inductance TA connects the negative pole of diode D4 and one end of electric capacity C4 respectively, and the other end of electric capacity C4 connects the positive pole of diode D4 through resistance R4.
The other end of described inductance TB connects the positive pole of the positive pole of rectifier diode D8, one end of electric capacity C3 and diode D3 respectively, and the other end of electric capacity C3 connects the negative pole of rectifier diode D8 through resistance R3,
The negative pole of described diode D3 connects the negative pole of rectifier diode D8 through resistance Rb.
The other end of described inductance TB connects the negative pole of diode D6 and one end of electric capacity C6 respectively, and the other end of electric capacity C6 connects the positive pole of diode D6 through resistance R6.
The other end of described inductance TC connects the positive pole of the positive pole of rectifier diode D9, one end of electric capacity C5 and diode D5 respectively, and the other end of electric capacity C5 connects the negative pole of rectifier diode D9 through resistance R5.
The negative pole of described diode D5 connects the negative pole of rectifier diode D9 through resistance Rc.
The other end of described inductance TC connects the negative pole of diode D2 and one end of electric capacity C8 respectively, and the other end of electric capacity C8 connects the positive pole of diode D2 through resistance R2.
After the present invention adopts above technical scheme, compared with prior art, have the following advantages:
1, power factor is high, harmonic pollution is little: the power factor of IGBT series resonant inverter intermediate frequency power supply device is greater than 0.95 all the time, harmonic content is little, lower than the requirement of country's " odd harmonic and even-order harmonic sum are less than 5% ", even-order harmonic is all less than 2%, odd harmonic and even-order harmonic sum are less than 5%, meet the requirement of national standard (GB/T14549-93) " quality of power supply utility network harmonic wave ".
2, line loss is little, power consumption is low, 25%-30% more energy-conservation than like product: output voltage of intermediate frequency high (2800V) in this invention, output current little (2.5-3 of direct current doubly), and the output voltage of other intermediate frequency power supply is up to 1500V at present, output current is 5-6 times of direct current, for 600KW equipment, the voltage of intermediate frequency of IGBT series resonant inverter intermediate frequency power supply device is 2800V, electric current of intermediate frequency is 3600A, and the voltage of intermediate frequency of common controllable silicon equipment is 1500V, electric current of intermediate frequency is 6800A, suppose that the internal resistance of output is r, then line loss is respectively: line loss P1=I2r=(3600) 2*r of IGBT series resonant inverter intermediate frequency power supply device, line loss P2=I2r=(6800) 2*r of common thyristor intermediate frequency electric source, the line loss of common thyristor intermediate frequency electric source is far longer than the line loss of energy-saving IGBT series resonant inverter intermediate frequency power supply assembling.
Power consumption aspect, the ton power consumption of IGBT series resonant inverter intermediate frequency power supply device is 520-550 degree, and the power consumption of current domestic and international advanced controllable silicon smelting equipment is 650-680 degree, can save energy 25%-30%.
3, constant power output, burn-off rate is fast: the IGBT series resonant inverter intermediate frequency power supply device in this invention, the equipment that uniquely can realize constant power output at present, for 600KW equipment, melt a stove and altogether need 55 minutes, wherein have the time service of 53 minutes in invariable power state, the invariable power time reaches 96%, and this is that miscellaneous equipment is beyond one's reach;
On the one hand because IGBT series resonant inverter intermediate frequency power supply device achieves invariable power, reach 96%, in addition because IGBT series resonant inverter intermediate frequency power supply device intermediate frequency power supply voltage of intermediate frequency is high, electromagnetic coupled efficiency is high, reaches 98%, two reasons make IGBT series resonant inverter intermediate frequency power supply device burn-off rate fast especially, 150KG/300KW equipment is 20 minutes stoves only, ton power consumption: 550 degree, 1000KG/700KW equipment 45 minutes stoves, ton power consumption 520 degree, miscellaneous equipment all cannot reach this kind of speed.
Below in conjunction with drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Accompanying drawing 1 is the IGBT Serial inverting circuit schematic diagram of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention;
Accompanying drawing 2 is rectification main circuit schematic diagrams of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention;
Accompanying drawing 3 is driving power circuit schematic diagrams of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention;
Accompanying drawing 4 is Voltage-Controlled oscillation circuit schematic diagrams of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention;
Accompanying drawing 5 is that the commutating pulse of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention forms circuit theory diagrams;
Accompanying drawing 6 is guard signal circuit theory diagrams of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention;
Accompanying drawing 7 is power factor change figure of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention;
Accompanying drawing 8 is that 5 subharmonic of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention are containing spirogram;
Accompanying drawing 9 is that 7 subharmonic of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention are containing spirogram;
Accompanying drawing 10 is changed power curve charts of IGBT series resonant inverter intermediate frequency power supply device in the embodiment of the present invention.
Embodiment
Embodiment, a kind of IGBT series resonant inverter intermediate frequency power supply device comprises the IGBT Serial inverting circuit of electrical connection, rectification main circuit, driving power circuit, Voltage-Controlled oscillation circuit, commutating pulse form circuit and guard signal circuit.
As shown in Figure 1, IGBT Serial inverting circuit comprises IGBT module T1, T2, T3, T4 and capacitor C1, C2, inverter is by IGBT module T1, T2, T3, T4 and capacitor C1, C2 forms half-bridge converter, the gate pole of IGBT module T1 connects the positive pole of electric capacity CF1, the negative pole of electric capacity CF1 connects the positive pole of electric capacity CF2, the negative pole of electric capacity CF2 connects the emitter of IGBT module T2, the collector electrode of IGBT module T2 connects the emitter of IGBT module T1, the collector electrode of IGBT module T1 connects the collector electrode of IGBT module T3 and one end of electric capacity C1 respectively, the emitter of IGBT module T3 connects the emitter of IGBT module T1, the emitter of IGBT module T3 is through the equivalent inductance of induction furnace and resistance L, R connects the other end of electric capacity C1, one end of another termination capacitor C2 of electric capacity C1, the emitter of another termination IGBT module T4 of electric capacity C2.
The specification of C1, C2 is identical, and L, R are equivalent inductance and the resistance of induction furnace.
Its course of work is as follows: constant direct voltage is added between positive pole and cathode bus bar, and by electric capacity C1, C2 divides equally, and they are all filled with and just descend negative voltage, and now, trigger T1, T3, then the electric current flowing through induction furnace is made up of two parts.One is the discharge stream of C1: C1 upper end-T1, T3-L, R-C1 lower end, another road is the charging current of C2: C
fupper end T1, T3-L, R-C
flower end.This two-way is all a part for same resonant circuit, and the former is made up of C1, L, R, and the latter is made up of C2, L, R.Due to C1=C2, thus two circuit work frequencies are identical, equal by the resonance frequency of C=C1+C2, L, R built-up circuit.When C1 electric discharge terminates, on it, voltage is the upper charging voltage of 0, C2 must be U
d, because C
fboth end voltage U
dconstant, its value equals the upper voltage sum of C1, C2.At this moment the electric current flowing through L, R is maximum, under the magnetic field energy effect stored, maintains above-mentioned two-way electric current and continues circulation in L, and just upper negative under C1 reverse charging is become, C2 is then from U
dvalue continues to raise, until magnetic field energy is down to 0.At this moment, on the upper back-pressure of C1 and C2, voltage all reaches maximum, and the electric current flowing through induction furnace L to this is just in time half just profound ripple.Then, under the effect of capacitance voltage, form two-way substantially identical with aforementioned two-way path (afterflow two pipe belt just in module flows electric current for T1, T3), the antipodal electric current in direction, this electric current still by just profound rule change, until C1 again positive charge to 1/2U
d, the voltage of C2 also reverts to 1/2U
d, electric current is down to 0, and the electric current flowing through induction furnace is just in time a just profound negative half-wave.Then trigger T2, T4, namely C2 is through L, R, T2, T4 electric discharge, and C1 is charged through L, R, T2, T4, and the electric current flowing through induction furnace is made up of two parts equally, and its frequency equals the resonance frequency of L, R, C (=C1+C2) built-up circuit.So the power frequency flowing through induction furnace must be identical.
The above-mentioned course of work, load obtains energy by the circuit natural oscillation half period from power supply, and second half cycle sends energy back to power supply again.Therefore, the power that load obtains is very little, for making load obtain maximum power, trigger rate must be made close to the natural mode shape of circuit.
Series resonant inverter is voltage-type resonance, during power work, comparatively supply voltage height 3-5 is doubly for pressure drop on body of heater coil L and direction equal with the pressure drop value on electric capacity C their value contrary, and controllable silicon parallel resonance, voltage on induction coil only has about 1.5 times of supply voltage, and the loss power P=I of coil
2r, owing in IGBT series resonance being that voltage is high, electric current is little, and controllable silicon parallel resonance is that voltage is low and electric current large, so IGBT series resonance line loss is little.
As shown in Figure 2, rectification main circuit comprises inductance TA, inductance TB and inductance TC, the one termination circuit breaker of inductance TA, inductance TB and inductance TC, the other end of inductance TA connects the positive pole of the positive pole of rectifier diode D7, one end of electric capacity C7 and diode D1 respectively, the other end of electric capacity C7 connects the negative pole of rectifier diode D7 through resistance R1, the negative pole of diode D1 connects the negative pole of rectifier diode D7 through resistance Ra, the other end of inductance TA connects the negative pole of diode D4 and one end of electric capacity C4 respectively, and the other end of electric capacity C4 connects the positive pole of diode D4 through resistance R4;
The other end of inductance TB connects the positive pole of the positive pole of rectifier diode D8, one end of electric capacity C3 and diode D3 respectively, the other end of electric capacity C3 connects the negative pole of rectifier diode D8 through resistance R3, the negative pole of diode D3 connects the negative pole of rectifier diode D8 through resistance Rb, the other end of inductance TB connects the negative pole of diode D6 and one end of electric capacity C6 respectively, and the other end of electric capacity C6 connects the positive pole of diode D6 through resistance R6;
The other end of inductance TC connects the positive pole of the positive pole of rectifier diode D9, one end of electric capacity C5 and diode D5 respectively, the other end of electric capacity C5 connects the negative pole of rectifier diode D9 through resistance R5, the negative pole of diode D5 connects the negative pole of rectifier diode D9 through resistance Rc, the other end of inductance TC connects the negative pole of diode D2 and one end of electric capacity C8 respectively, and the other end of electric capacity C8 connects the positive pole of diode D2 through resistance R2.
Adopt half control commutation technique, make rectification thyristor be in fully conducting state all the time, direct voltage remains at 500V, avoids the harmonic pollution adopting the angle of flow by adjusting rectification thyristor to realize Power Regulation to bring.Power adjustments adopts frequency modulation Power Regulation, makes the power factor of circuit remain at more than 95%, can realize energy-conservation.
As shown in Figure 3, driving power circuit comprises integrated circuit (IC) 1 and integrated circuit (IC) 2, integrated circuit (IC) 1 is rectifier bridge stack KBPC610, "+" end of integrated circuit (IC) 1 is through electric capacity C9 ground connection, "-" end ground connection of integrated circuit (IC) 1, "+" end of integrated circuit (IC) 1 is through electric capacity C10 ground connection, "+" end of integrated circuit (IC) 1 connects the base stage of triode Q1 through resistance R7, the emitter of triode Q1 connects "+" end of integrated circuit (IC) 1, the collector electrode of triode Q1 is through electric capacity C12 ground connection, the collector electrode of triode Q1 is through electric capacity C11 ground connection, the collector electrode of triode Q1 is through the resistance R8 of series connection and light-emitting diode D10 ground connection, the collector electrode of triode Q1 connects the Vout end of integrated circuit (IC) 2, the emitter of the Vin termination triode Q1 of integrated circuit (IC) 2, the GND of integrated circuit (IC) 2 holds ground connection, integrated circuit (IC) 2 is three terminal regulator 7815.
As shown in Figure 4, Voltage-Controlled oscillation circuit comprises integrated circuit (IC) 3, integrated circuit (IC) 3 is CD4046, one end of the R2 termination variable resistor R9 of integrated circuit (IC) 3, the other end of variable resistor R9 is through resistance R13 ground connection, one end of the R1 termination variable resistor R10 of integrated circuit (IC) 3, the other end of variable resistor R10 is through resistance R14 ground connection, the CB end of integrated circuit (IC) 3 connects the CA end of integrated circuit (IC) 3 through the electric capacity C13 of parallel connection and electric capacity C14, the INH of integrated circuit (IC) 3 holds ground connection, the VCIN end of integrated circuit (IC) 3 meets VCIN through resistance R11, VCIN is the output of pi regulator, pi regulator input is respectively Power Regulation voltage TG(negative value), phase difference VZ(on the occasion of), the VCIN end of integrated circuit (IC) 3 is through the resistance R12 of parallel connection and electric capacity C15 ground connection.
As shown in Figure 5, commutating pulse forms circuit and comprises integrated circuit (IC) 4, integrated circuit (IC) 4 is switch power controller KA3525A, the EAOUT end of EA (-) the termination integrated circuit (IC) 4 of integrated circuit (IC) 4, the SOFTSTART end of EA (+) the termination integrated circuit (IC) 4 of integrated circuit (IC) 4, the DISCHARGE end of the CT termination integrated circuit (IC) 4 of integrated circuit (IC) 4, the RT end of integrated circuit (IC) 4 is through resistance R15 ground connection, the CT end of integrated circuit (IC) 4 is through electric capacity C16 ground connection, the SHUA DOWN of integrated circuit (IC) 4 holds resistance R16 through parallel connection and electric capacity C17 ground connection, the OUTA end of integrated circuit (IC) 4 is through resistance R17 ground connection, the GND of integrated circuit (IC) 4 holds ground connection, the VC end of integrated circuit (IC) 4 connects+15V voltage through resistance R18, Vcc termination+15V the voltage of integrated circuit (IC) 4, the Vcc end of integrated circuit (IC) 4 is through the electric capacity C18 of parallel connection and electric capacity C19 ground connection, the G end of the OUTA termination field effect transistor Q3 of integrated circuit (IC) 4, the S of field effect transistor Q3 holds ground connection, the D of field effect transistor Q3 holds the resistance R19 through connecting and light-emitting diode D11 to connect 1 pin of master control borad lead-out terminal CON11, the model of field effect transistor Q3 is IRF630N.
As shown in Figure 6, guard signal circuit comprises integrated circuit (IC) 5, IC6 and IC7, integrated circuit (IC) 5, IC6 and IC7 is dual operational amplifier LM358, integrated circuit (IC) 5 comprises IC5A and IC5B two parts, integrated circuit (IC) 6 comprises IC6A and IC6B two parts, integrated circuit (IC) 7 comprises IC7A and IC7B two parts, the resistance R20 of 5th pin through connecting of integrated circuit (IC) 5, R21 and R22 connects the 6th pin of integrated circuit (IC) 5, one end of 6th pin connecting resistance R22 of integrated circuit (IC) 5, the other end of resistance R22 is through resistance R26 ground connection, the other end of resistance R22 connects the 2nd pin of integrated circuit (IC) 5 through resistance R5, 4th pin ground connection of integrated circuit (IC) 5, 8th foot meridian capacitor C20 ground connection of integrated circuit (IC) 5, 8th pin of integrated circuit (IC) 5 meets VCC, 3rd pin of integrated circuit (IC) 5 meets VCC through resistance R27,
7th pin of integrated circuit (IC) 5 connects the collector electrode of triode Q2 through the resistance R23 of series connection and diode D12, 7th pin of integrated circuit (IC) 5 connects the 5th pin of integrated circuit (IC) 6 through the resistance R23 of series connection and resistance R24, 8th pin of integrated circuit (IC) 6 meets VCC, 4th pin ground connection of integrated circuit (IC) 6, 6th pin of integrated circuit (IC) 6 meets VCC through resistance R28, 6th pin of integrated circuit (IC) 6 is through resistance R29 ground connection, 6th pin of integrated circuit (IC) 6 connects the 2nd pin of integrated circuit (IC) 6, 1st pin of integrated circuit (IC) 5 connects the 3rd pin of integrated circuit (IC) 6 through the resistance R30 of series connection and resistance R31, 1st pin of integrated circuit (IC) 5 connects the collector electrode of triode Q2 through the resistance R30 of series connection and diode D17,
7th pin of integrated circuit (IC) 6 is through the resistance R32 of series connection and light-emitting diode D13 ground connection, 7th pin of integrated circuit (IC) 6 is through the diode D14 of series connection and resistance R34 ground connection, 1st pin of integrated circuit (IC) 6 is through the diode D15 of series connection and resistance R34 ground connection, and the 1st pin of integrated circuit (IC) 6 is through the resistance R33 of series connection and light-emitting diode D16 ground connection;
7th pin of integrated circuit (IC) 6 connects the 2nd pin of integrated circuit (IC) 7 through the diode D14 of series connection and resistance R35, 3rd pin of integrated circuit (IC) 7 connects the 5th pin of integrated circuit (IC) 7, one end of 1st pin connecting resistance R36 of integrated circuit (IC) 7, the negative pole of another terminating diode D19 of resistance R36, the positive pole of diode D19 is through electric capacity C21 ground connection, the positive pole of diode D19 meets VCC through resistance R37, 3rd pin of integrated circuit (IC) 7 is through resistance R39 ground connection, one end of 3rd pin connecting resistance R38 of integrated circuit (IC) 7, one end of other end connecting resistance R40 of resistance R38 and the negative pole of diode D18, the other end of resistance R40 and the positive pole of diode D18 connect the 6th pin of integrated circuit (IC) 7 through resistance R41, the positive pole of diode D18 is through electric capacity C23 ground connection, 4th pin ground connection of integrated circuit (IC) 7, 8th foot meridian capacitor C22 ground connection of integrated circuit (IC) 7, 7th pin of integrated circuit (IC) 7 connects the base stage of triode Q2 through resistance R42, the emitter polar region of triode Q2.
As shown in Figure 7, the power factor of IGBT series resonant inverter intermediate frequency power supply device is greater than 0.95 all the time, is on average greater than 0.98.
As illustrated in Figure 8 and 9 reference, 5 subharmonic and 7 subharmonic of IGBT series resonant inverter intermediate frequency power supply device are all less than 5%, even-order harmonic is all less than 2%, and odd harmonic and even-order harmonic sum are less than 5%, meets the requirement of national standard (GB/T14549-93) " quality of power supply utility network harmonic wave ".
As shown in Figure 10, for 600KW equipment, IGBT series resonant inverter intermediate frequency power supply device of the present invention melts a stove needs 55 minutes altogether, and wherein have the time service of 53 minutes in invariable power state, the invariable power time reaches 96%, and this is that miscellaneous equipment is beyond one's reach.
On the one hand because IGBT series resonant inverter intermediate frequency power supply device achieves invariable power, reach 96%, in addition because IGBT series resonant inverter intermediate frequency power supply device intermediate frequency power supply voltage of intermediate frequency is high, electromagnetic coupled efficiency is high, reaches 98%, two reasons make IGBT series resonant inverter intermediate frequency power supply device burn-off rate fast especially, 150KG/300KW equipment is 20 minutes stoves only, ton power consumption: 550 degree, 1000KG/700KW equipment 45 minutes stoves, ton power consumption 520 degree, miscellaneous equipment all cannot reach this kind of speed.
Those skilled in the art will recognize that; above-mentioned embodiment is exemplary; to enable those skilled in the art better understand content of the present invention; should not be understood as limiting the scope of the invention; every improvement done according to technical solution of the present invention, all falls into protection scope of the present invention.
Claims (10)
1. an IGBT series resonant inverter intermediate frequency power supply device, is characterized in that: comprise the IGBT Serial inverting circuit of electrical connection, rectification main circuit, driving power circuit, Voltage-Controlled oscillation circuit, commutating pulse formation circuit and guard signal circuit.
2. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 1, it is characterized in that: described rectification main circuit comprises inductance TA, inductance TB and inductance TC, the one termination circuit breaker of inductance TA, inductance TB and inductance TC, the other end of inductance TA connects the positive pole of the positive pole of rectifier diode D7, one end of electric capacity C7 and diode D1 respectively, and the other end of electric capacity C7 connects the negative pole of rectifier diode D7 through resistance R1.
3. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 2, is characterized in that: the negative pole of described diode D1 connects the negative pole of rectifier diode D7 through resistance Ra.
4. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 3, is characterized in that: the other end of described inductance TA connects the negative pole of diode D4 and one end of electric capacity C4 respectively, and the other end of electric capacity C4 connects the positive pole of diode D4 through resistance R4.
5. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 4, it is characterized in that: the other end of described inductance TB connects the positive pole of rectifier diode D8, one end of electric capacity C3 and the positive pole of diode D3 respectively, and the other end of electric capacity C3 connects the negative pole of rectifier diode D8 through resistance R3.
6. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 5, is characterized in that: the negative pole of described diode D3 connects the negative pole of rectifier diode D8 through resistance Rb.
7. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 6, is characterized in that: the other end of described inductance TB connects the negative pole of diode D6 and one end of electric capacity C6 respectively, and the other end of electric capacity C6 connects the positive pole of diode D6 through resistance R6.
8. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 7, it is characterized in that: the other end of described inductance TC connects the positive pole of rectifier diode D9, one end of electric capacity C5 and the positive pole of diode D5 respectively, and the other end of electric capacity C5 connects the negative pole of rectifier diode D9 through resistance R5.
9. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 8, is characterized in that: the negative pole of described diode D5 connects the negative pole of rectifier diode D9 through resistance Rc.
10. a kind of IGBT series resonant inverter intermediate frequency power supply device as claimed in claim 9, is characterized in that: the other end of described inductance TC connects the negative pole of diode D2 and one end of electric capacity C8 respectively, and the other end of electric capacity C8 connects the positive pole of diode D2 through resistance R2.
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| CN201510096903.9A CN104638945A (en) | 2015-03-05 | 2015-03-05 | IGBT (insulated gate bipolar translator) serial inverting medium-frequency power supply device |
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| CN201510096903.9A CN104638945A (en) | 2015-03-05 | 2015-03-05 | IGBT (insulated gate bipolar translator) serial inverting medium-frequency power supply device |
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| CN201510096903.9A Pending CN104638945A (en) | 2015-03-05 | 2015-03-05 | IGBT (insulated gate bipolar translator) serial inverting medium-frequency power supply device |
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