CN103475196A - Actuator of insulated gate bipolar transistor - Google Patents
Actuator of insulated gate bipolar transistor Download PDFInfo
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- CN103475196A CN103475196A CN2013104086238A CN201310408623A CN103475196A CN 103475196 A CN103475196 A CN 103475196A CN 2013104086238 A CN2013104086238 A CN 2013104086238A CN 201310408623 A CN201310408623 A CN 201310408623A CN 103475196 A CN103475196 A CN 103475196A
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Abstract
The invention discloses an actuator of an insulated gate bipolar transistor. The actuator of the insulated gate bipolar transistor comprises an isolating input unit, a level converting unit, a positive and negative power source distributing unit, an auxiliary power source unit, a driving output unit, an over-current detection unit, a grid voltage reduction unit, a deferred judgment unit, a soft switching-off unit, and a failure alarming output unit. According to the actuator of the insulated gate bipolar transistor, when short circuit happens to over currents, the over-current detection unit acts to transmit over-current information to the grid voltage reduction unit and the deferred judgment unit, then the grid voltage reduction unit acts to output signals to the driving output unit, and then driving pulses are reduced; the deferred judgment unit acts to judge the time of duration of the over currents and send a command to the soft switching-off unit and the level converting unit, input is stopped by the level converting unit, a switching-off command is sent to the driving output unit by the soft switching-off unit, and a signal is output to the short circuit alarming unit at the same time. According to the actuator of the insulated gate bipolar transistor, a high-speed photoelectric coupler is used for isolation, protective measures are complete, a signal blocking function is achieved, and the actuator of the IGBT can be protected to the maximum degree.
Description
Technical field
The invention discloses a kind of insulated gate bipolar transistor driver; relate to power electronic device driving, resist technology; especially the power tube in Switching Power Supply drives resist technology; specifically; the present invention relates generally to High Power IGBT Driver Circuit and current foldback circuit design, belongs to electronic technology field.
Background technology
IGBT(Insulated Gate Bipolar Transistor), insulated gate bipolar transistor, be a kind of compound full-control type voltage driven type power semiconductor.This device is comprised of double pole triode and insulating gate type field effect tube, have the advantage of low conduction voltage drop and high input impedance two aspects concurrently, possess that little, the withstand voltage coefficient of driving power is high, current carrying capacity is strong, cut-off the characteristics such as speed is fast, saturation pressure reduction, therefore be widely used in Switching Power Supply, frequency converter, lighting circuit, new forms of energy equipment, and the fields such as Traction Drive of high power DC, alternating current machine, be to there is revolutionary device.
IGBT plays vital effect in the design of Circuits System, safe and stable operation, and the reliability of IGBT just will directly have influence on the operation level of whole system.Can IGBT work and be closely related with the drive circuit design of IGBT, yet in the middle of driver design in the past, often have the defect of the following aspects: 1) the opening of IGBT, shutoff voltage circuit anti-interference poor performance produce larger conducting, turn-off consume; 2) when flow short-circuit occurred in IGBT, due to huge current changing rate, will on loop inductance, produce high voltage, likely can make IGBT puncture; 3) poor for operating short time voltage, curent change judgement, send the wrong instruction of opening, turn-off, affect operating efficiency.
Summary of the invention
Technical problem to be solved by this invention is: for the defect of prior art, provide a kind of insulated gate bipolar transistor driver.The isolation of employing high-speed photoelectric coupler, have the signal lock-out facility.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of insulated gate bipolar transistor driver, comprise Isolation input unit, level conversion unit, positive-negative power allocation units, accessory power supply unit, driver output unit, over-current detection unit, fall the grid voltage unit, postpone judging unit, soft shutoff unit, fault alarm output unit;
Described Isolation input unit, positive-negative power allocation units, accessory power supply unit are connected with level conversion unit respectively, and level conversion unit is connected with the driver output unit;
Described over-current detection unit respectively with postpone judging unit, fall the grid voltage unit and be connected, the delay judging unit is connected with level conversion unit, soft shutoff unit respectively, falls the grid voltage unit and is connected with the driver output unit; Soft shutoff unit is connected with driver output unit, fault alarm output unit respectively;
When flow short-circuit occurred when, over-current detection unit action, and will cross stream information and be sent to respectively and fall the grid voltage unit and postpone judging unit, the action of grid voltage unit is fallen, output signal to the driver output unit, reduce driving pulse; Postpone the judging unit action, the judgement overcurrent duration, and send instruction to soft shutoff unit and level conversion unit, level conversion unit carries out locking to input, soft shutoff unit sends the shutoff instruction to the driver output unit, outputs signal to the short-circuit alarming unit simultaneously.
Circuit structure of the present invention is specific as follows:
Comprise port to 14 port No. 1, voltage-stabiliser tube, the first diode to the eight diodes, the first to the 6th triode, the first electric capacity to the 11 electric capacity, the first resistance to the 18 resistance, first to fourth comparator, photoelectrical coupler, two accessory power supply port VCC, VDD, earth terminal, the moving public COM contact that drives device inside;
The Isolation input unit comprises photoelectrical coupler and the first resistance; No. 1 port is connected with an end of the first resistance, and the other end of the first resistance is connected with the second pin of photoelectrical coupler, and No. 2 port is connected with the 3rd pin of photoelectrical coupler;
Level conversion unit comprises the 8th to the 11 resistance, the 17 resistance, the second comparator, the 3rd electric capacity, the 8th electric capacity, the tenth electric capacity, one end of No. 9 ports and the tenth electric capacity is connected and ground connection, respectively with No. 11 ports of the other end of the tenth electric capacity, one end of the 8th resistance is connected and external VCC, an end of the other end of the 8th resistance the respectively with nine resistance, one end of the tenth resistance, one end of the 8th electric capacity, the 8th pin of the feeder ear photoelectrical coupler of the second comparator is connected and external VDD, the other end of the 9th resistance respectively with the 6th pin of photoelectrical coupler, the negative input end of the second comparator, the negative input end of the first comparator, one end of the 15 resistance is connected, the other end of the tenth resistance respectively with an end of the 11 resistance, one end of the 3rd electric capacity, the positive input terminal of the second comparator, the positive input terminal of the first comparator, one end of the 3rd resistance is connected, the other end ground connection of the 8th electric capacity, the other end of the other end of the 11 resistance the respectively with three electric capacity, the 5th pin of photoelectrical coupler, No. 12 ports, one end of the first electric capacity, one end of the second electric capacity, the positive pole of voltage-stabiliser tube, one end of the 6th resistance is connected and is connected to the moving public COM contact that drives device inside,
The positive-negative power allocation units comprise the 6th resistance, the first electric capacity, the second electric capacity, voltage-stabiliser tube, and the other end of the first electric capacity is connected with the voltage-stabiliser tube negative pole and external VCC, and the other end of the other end of the 6th resistance and the second electric capacity is connected and ground connection;
Over-current detection unit comprises the first diode, the second diode, the 4th resistance, the 5th resistance, the 7th resistance, the 16 resistance, the 4th electric capacity, the 9th electric capacity, the 4th comparator, the negative pole of the first diode is connected with No. 14 ports, an end of the positive pole of the first diode the respectively with seven resistance, the positive pole of the second diode is connected, the other end of the second diode respectively with an end of the 13 resistance, the output of the first comparator is connected, respectively with No. 13 ports of the other end of the 7th resistance, one end of the 4th resistance, the positive input terminal of the 4th comparator, one end of the 11 electric capacity is connected, the external VDD of the other end of the 4th resistance, No. 8 ports respectively with an end of the 16 resistance, one end of the 5th resistance, one end of the 4th electric capacity, the negative input end of the 4th comparator is connected, and the other end of the 16 resistance connects the moving public COM contact that drives device inside, the other end of the other end of the 5th resistance the respectively with four electric capacity, one end of the 9th electric capacity is connected and external VDD, and the other end of the 9th electric capacity connects the moving public COM contact that drives device inside,
Fall the grid voltage unit and comprise the 13 resistance, the 7th electric capacity, the 3rd diode, the second triode, one end of the other end of the 13 resistance the respectively with seven electric capacity, the base stage of the second triode is connected, the collector electrode of the other end of the 7th electric capacity and the second triode is connected and external VDD, the negative pole of the emitter of the second triode the respectively with three diode, No. 5 ports, one end of the 5th electric capacity, the positive pole of the 6th diode is connected, the output of positive pole respectively with the second comparator of the 3rd diode, one end of the 17 resistance, the base stage of the 4th triode, the base stage of the 3rd triode is connected,
Postpone judging unit and comprise the 18 resistance, the 11 electric capacity, an end of the 18 resistance connects the moving public COM contact that drives device inside, and the other end of the 18 resistance is connected with the other end of the 11 electric capacity;
Soft shutoff unit comprises the 3rd resistance, the 5th diode, the 3rd comparator, the 6th electric capacity, the 14 resistance, one end of the negative input end of No. 6 port the respectively with three comparators, the positive pole of the 5th diode, the 6th electric capacity, an end of the 14 resistance are connected, the other end of the 6th electric capacity is connected and is connected to VDD with the other end of the 14 resistance, the output of the 3rd comparator is connected with the other end of the 3rd resistance, and the positive input terminal of the 3rd comparator connects the moving public COM contact that drives device inside;
The fault alarm output unit comprises the second resistance, the 4th diode, the 6th diode, the 7th diode, the 8th diode, the first triode, the 12 resistance, the 5th electric capacity, the positive pole of the negative pole of the 4th diode the respectively with five diode, the output of the 4th comparator is connected, one end of positive pole respectively with the second resistance of the 4th diode, the base stage of the first triode is connected, the other end of the second resistance connects the moving public COM contact that drives device inside, respectively with No. 7 ports of the collector electrode of the first triode, one end of the 12 resistance, the negative pole of the 8th diode is connected, the positive pole of the 8th diode is connected with the other end of the 15 resistance, the other end of the 12 resistance is connected with the negative pole of the 6th diode, the other end ground connection of the 5th electric capacity, the emitter of the first triode is connected with the positive pole of the 7th diode, the minus earth of the 7th diode,
Fault alarm output unit bridge comprises the 3rd triode, the 4th triode, the 5th triode, the 6th triode, the emitter of the emitter of the 3rd triode and the 6th triode is connected and ground connection, the base stage of the emitter of the collector electrode of the 3rd triode the respectively with four triode, the base stage of the 5th triode, the 6th triode is connected, the collector electrode of the 4th triode is connected and external VCC with an end of the 17 resistance, the collector electrode of the 5th triode respectively, and the collector electrode of respectively with No. 10 ports of the emitter of the 5th triode, the 6th triode is connected.
As the present invention further optimization scheme, the model of described optical coupler is HCPL-0453.
The present invention adopts above technical scheme compared with prior art, and have following technique effect: safeguard measure is complete, can protect to greatest extent the driver of IGBT
the accompanying drawing explanation
Fig. 1 is the block diagram of a kind of high-power IGBT driver of the present invention.
Fig. 2 is the circuit theory diagrams of a kind of high-power IGBT driver of the present invention,
Wherein: Pin1 to Pin14 is respectively port to 14 port No. 1, D1 is voltage-stabiliser tube, D2 to D9 is respectively the first diode to the eight diodes, V1 to V6 is respectively the first to the 6th triode, C1 to C10 is respectively the first electric capacity to the ten electric capacity, R1 to R17 is respectively the first resistance to the 17 resistance, and U1A to U1D is respectively first to fourth comparator, and U2 is photoelectrical coupler HCPL-0453.
Embodiment
Technical scheme of the present invention is: driver by Isolation input unit, level conversion unit, positive-negative power allocation units, accessory power supply unit, over-current detection unit, fall the grid voltage unit, postpone judging unit, soft shutoff unit, driver output unit and short-circuit alarming unit form.
Wherein, the Isolation input unit of IGBT driver is optical coupling isolation circuit, realizes electrical isolation, with level conversion unit, is connected.Level conversion unit connects positive-negative power allocation units and accessory power supply unit simultaneously, connects subsequently the driver output unit; Output unit is connected with the IGBT grid, realizes the driving to IGBT.Drive the protection part that the IGBT over-current detection unit is set, fall the grid voltage unit, postpone judging unit, soft shutoff unit and fault alarm output unit.When flow short-circuit occurred in IGBT, IGBT over-current detection unit action, and will cross stream information and be sent to and fall the grid voltage unit and postpone judging unit.Fall the action of grid voltage unit, output signal to output unit, reduce driving pulse.Simultaneously, postpone the judging unit action, the judgement overcurrent duration, and send instruction to soft shutoff unit and level conversion unit, level conversion unit carries out locking to input, and soft shutoff unit sends the shutoff instruction to the driver output unit, outputs signal to the short-circuit alarming unit simultaneously.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
Block diagram of the present invention as shown in Figure 1, whole driver is comprised of 10 unit, comprises Isolation input unit, level conversion unit, positive-negative power allocation units, accessory power supply unit, over-current detection unit, falls the grid voltage unit, postpones judging unit, soft shutoff unit, driver output unit and short-circuit alarming unit.Driver is containing 12 ports.
As shown in Figure 2, wherein: No. 1, No. 2 port is signal input part to circuit theory diagrams of the present invention, is the input of Isolation input unit; No. 3, No. 4 ports are reserved port; No. 5 ports are the soft turn-off time to set end, are an input of soft shutoff unit; No. 6 ports are again to set end start-up time after short-circuit protection, input to the delay judging unit; No. 7 ports are the fault-signal output, receive the alarm signal of sending from soft shutoff unit; Collector emitter voltage when No. 8 port is overcurrent arranges end; Negative terminal and the anode of the accessory power supply Vp that No. 9, No. 11 ports are driver; No. 10 port is driver output end, connects the grid of IGBT; The reference Point C OM of No. 12 port driver inside, connect the positive-negative power allocation units; No. 13 ports are the blind area time to set end, can effectively be reduced in that IGBT opens, the loss in turn off process; No. 14 port is IGBT current detecting end, connects the collector electrode of IGBT, as the input of over-current detection unit.
(1) the Isolation input unit is comprised of photoelectrical coupler U2 and resistance R 1, is the input of driver, and the access pwm signal is realized electrical isolation simultaneously;
(2) level conversion unit is comprised of resistance R 8, R9, R10, R11, R17 and comparator U1B, receives the signal of Isolation input unit, with positive-negative power allocation units, accessory power supply unit, is connected, and exports the driver output unit to simultaneously;
(3) the positive-negative power allocation units are by resistance R 6, capacitor C 1, C2, and voltage-stabiliser tube D1 forms, and single power supply can be converted to positive voltage Vcc and negative voltage GND, is output as the common port ground COM of internal drive, with other unit, is connected.The positive-negative power allocation units are connected with level conversion unit;
(4) VCC, GND provide auxiliary operating voltage for external accessory power supply unit for driver, and VDD is the mid point of VCC and GND, and VDD voltage ratio VCC after the R8 dividing potential drop is lower slightly, and the effect of R8 is similar to current-limiting resistance;
(5) over-current detection unit is by electric diode D2, resistance R 4, R5, R7, and comparator U1D forms, judgement driver overcurrent condition, and transmit signals to and fall grid voltage, postpone judging unit;
(6) fall the grid voltage unit and be comprised of resistance R 13, capacitor C 7, diode D4, triode V2, the output signal that receives over-current detection unit is input, and output simultaneously is connected to the driver output unit, reduces grid voltage;
(7) postpone judging unit and set by resistance R 18, capacitor C 11, receive over-current detection information, the overcurrent condition of judgement t rear drive time of delay device.When needs turn-off driver, send a signal to soft shutoff unit, send a signal to level conversion unit simultaneously, the locking input signal, can normally carry out soft shutoff;
(8) soft shutoff unit is by resistance R 3, capacitor C 5, and comparator U1C forms, and receives the cut-off signals of self-dalay judging unit, and this signal is sent to output unit, reduces gradually grid voltage, reduces current changing rate, realizes the soft shutoff to driver.Over-current signal is sent to alarm unit simultaneously;
(9) output unit is comprised of triode V3, V4, V5, the V6 of bridging, receives from level conversion unit, falls the signal of grid voltage unit, soft shutoff unit, with the IGBT grid, is connected, and sends the driving signal;
(10) alarm unit is by resistance R 2, diode D5, D8, and triode V1 forms, and receives the signal from soft shutoff unit, and sends warning message.
The present invention comprises three kinds of working methods, and details are as follows:
(1) normal operating conditions
During normal operation, the PWM input signal is by port one, 2 accesses, after optical coupler is isolated, deliver to the IGBT drive circuit by level shifting circuit, after amplifying, output pwm signal is to the IGBT grid, and the charging and discharging speed that can regulate the IGBT grid by regulating the resistance that be connected with grid.Over-current detection unit, postpone judging unit, fall the grid voltage unit, soft shutoff unit is failure to actuate, be failure to actuate in the short-circuit alarming unit.
(2) overcurrent short-circuit condition
When the overcurrent detecting unit detects the short circuit overcurrent signal, transmit signals to and fall the grid voltage unit, fall the grid voltage unit and send the step-down signal to the driver output unit, IGBT output is reduced gradually.Simultaneously, over-current detection unit is sent to the delay judging unit by over-current signal, after setting t time of delay, postpone judging unit and again from over-current detection unit, read stream information, if overcurrent still exists, now by postponing judging unit, send over-current signal to soft shutoff unit, the action of soft shutoff unit, send the judgement signal to the driver output unit, grid voltage is reduced gradually, until turn-off, avoid because electric current changes fast, the inductance induced voltage increases suddenly, punctures IGBT.Meanwhile, postpone judging unit and send block signal to level conversion unit, avoid receiving the hard cut-off signals from level conversion unit at soft blocking interval.Soft shutoff unit sends alarm signal simultaneously to the short-circuit alarming unit.
(3) of short duration overcurrent short-circuit condition
When the overcurrent detecting unit detects the IGBT overcurrent, the action of gate voltage unit is fallen, and postpone judging unit simultaneously and start timing.After postponing a time t, again from over-current detection unit, receive signal, if over-current signal disappears, postpone judging unit and do not send cut-off signals, driver proceeds to normal operating conditions.
Claims (3)
1. an insulated gate bipolar transistor driver, is characterized in that: comprise Isolation input unit, level conversion unit, positive-negative power allocation units, accessory power supply unit, driver output unit, over-current detection unit, fall the grid voltage unit, postpone judging unit, soft shutoff unit, fault alarm output unit;
Described Isolation input unit, positive-negative power allocation units, accessory power supply unit are connected with level conversion unit respectively, and level conversion unit is connected with the driver output unit;
Described over-current detection unit respectively with postpone judging unit, fall the grid voltage unit and be connected, the delay judging unit is connected with level conversion unit, soft shutoff unit respectively, falls the grid voltage unit and is connected with the driver output unit; Soft shutoff unit is connected with driver output unit, fault alarm output unit respectively;
When flow short-circuit occurred when, over-current detection unit action, and will cross stream information and be sent to respectively and fall the grid voltage unit and postpone judging unit, the action of grid voltage unit is fallen, output signal to the driver output unit, reduce driving pulse; Postpone the judging unit action, the judgement overcurrent duration, and send instruction to soft shutoff unit and level conversion unit, level conversion unit carries out locking to input, soft shutoff unit sends the shutoff instruction to the driver output unit, outputs signal to the short-circuit alarming unit simultaneously.
2. a kind of insulated gate bipolar transistor driver as claimed in claim 1, is characterized in that, circuit structure is specific as follows:
Comprise port to 14 port No. 1, voltage-stabiliser tube, the first diode to the eight diodes, the first to the 6th triode, the first electric capacity to the 11 electric capacity, the first resistance to the 18 resistance, first to fourth comparator, photoelectrical coupler, two accessory power supply port VCC, VDD, earth terminal, the public COM contact of internal drive;
The Isolation input unit comprises photoelectrical coupler and the first resistance; No. 1 port is connected with an end of the first resistance, and the other end of the first resistance is connected with the second pin of photoelectrical coupler, and No. 2 port is connected with the 3rd pin of photoelectrical coupler;
Level conversion unit comprises the 8th to the 11 resistance, the 17 resistance, the second comparator, the 3rd electric capacity, the 8th electric capacity, the tenth electric capacity, one end of No. 9 ports and the tenth electric capacity is connected and ground connection, respectively with No. 11 ports of the other end of the tenth electric capacity, one end of the 8th resistance is connected and external VCC, an end of the other end of the 8th resistance the respectively with nine resistance, one end of the tenth resistance, one end of the 8th electric capacity, the 8th pin of the feeder ear photoelectrical coupler of the second comparator is connected and external VDD, the other end of the 9th resistance respectively with the 6th pin of photoelectrical coupler, the negative input end of the second comparator, the negative input end of the first comparator, one end of the 15 resistance is connected, the other end of the tenth resistance respectively with an end of the 11 resistance, one end of the 3rd electric capacity, the positive input terminal of the second comparator, the positive input terminal of the first comparator, one end of the 3rd resistance is connected, the other end ground connection of the 8th electric capacity, the other end of the other end of the 11 resistance the respectively with three electric capacity, the 5th pin of photoelectrical coupler, No. 12 ports, one end of the first electric capacity, one end of the second electric capacity, the positive pole of voltage-stabiliser tube, one end of the 6th resistance is connected and is connected to the public COM contact of internal drive,
The positive-negative power allocation units comprise the 6th resistance, the first electric capacity, the second electric capacity, voltage-stabiliser tube, and the other end of the first electric capacity is connected with the voltage-stabiliser tube negative pole and external VCC, and the other end of the other end of the 6th resistance and the second electric capacity is connected and ground connection;
Over-current detection unit comprises the first diode, the second diode, the 4th resistance, the 5th resistance, the 7th resistance, the 16 resistance, the 4th electric capacity, the 9th electric capacity, the 4th comparator, the negative pole of the first diode is connected with No. 14 ports, an end of the positive pole of the first diode the respectively with seven resistance, the positive pole of the second diode is connected, the other end of the second diode respectively with an end of the 13 resistance, the output of the first comparator is connected, respectively with No. 13 ports of the other end of the 7th resistance, one end of the 4th resistance, the positive input terminal of the 4th comparator, one end of the 11 electric capacity is connected, the external VDD of the other end of the 4th resistance, No. 8 ports respectively with an end of the 16 resistance, one end of the 5th resistance, one end of the 4th electric capacity, the negative input end of the 4th comparator is connected, and the other end of the 16 resistance connects the public COM contact of internal drive, the other end of the other end of the 5th resistance the respectively with four electric capacity, one end of the 9th electric capacity is connected and external VDD, and the other end of the 9th electric capacity connects the public COM contact of internal drive,
Fall the grid voltage unit and comprise the 13 resistance, the 7th electric capacity, the 3rd diode, the second triode, one end of the other end of the 13 resistance the respectively with seven electric capacity, the base stage of the second triode is connected, the collector electrode of the other end of the 7th electric capacity and the second triode is connected and external VDD, the negative pole of the emitter of the second triode the respectively with three diode, No. 5 ports, one end of the 5th electric capacity, the positive pole of the 6th diode is connected, the output of positive pole respectively with the second comparator of the 3rd diode, one end of the 17 resistance, the base stage of the 4th triode, the base stage of the 3rd triode is connected,
Postpone judging unit and comprise the 18 resistance, the 11 electric capacity, an end of the 18 resistance connects the public COM contact of internal drive, and the other end of the 18 resistance is connected with the other end of the 11 electric capacity;
Soft shutoff unit comprises the 3rd resistance, the 5th diode, the 3rd comparator, the 6th electric capacity, the 14 resistance, one end of the negative input end of No. 6 port the respectively with three comparators, the positive pole of the 5th diode, the 6th electric capacity, an end of the 14 resistance are connected, the other end of the 6th electric capacity is connected and is connected to VDD with the other end of the 14 resistance, the output of the 3rd comparator is connected with the other end of the 3rd resistance, and the positive input terminal of the 3rd comparator connects the public COM contact of internal drive;
The fault alarm output unit comprises the second resistance, the 4th diode, the 6th diode, the 7th diode, the 8th diode, the first triode, the 12 resistance, the 5th electric capacity, the positive pole of the negative pole of the 4th diode the respectively with five diode, the output of the 4th comparator is connected, one end of positive pole respectively with the second resistance of the 4th diode, the base stage of the first triode is connected, the other end of the second resistance connects the public COM contact of internal drive, respectively with No. 7 ports of the collector electrode of the first triode, one end of the 12 resistance, the negative pole of the 8th diode is connected, the positive pole of the 8th diode is connected with the other end of the 15 resistance, the other end of the 12 resistance is connected with the negative pole of the 6th diode, the other end ground connection of the 5th electric capacity, the emitter of the first triode is connected with the positive pole of the 7th diode, the minus earth of the 7th diode,
Fault alarm output unit bridge comprises the 3rd triode, the 4th triode, the 5th triode, the 6th triode, the emitter of the emitter of the 3rd triode and the 6th triode is connected and ground connection, the base stage of the emitter of the collector electrode of the 3rd triode the respectively with four triode, the base stage of the 5th triode, the 6th triode is connected, the collector electrode of the 4th triode is connected and external VCC with an end of the 17 resistance, the collector electrode of the 5th triode respectively, and the collector electrode of respectively with No. 10 ports of the emitter of the 5th triode, the 6th triode is connected.
3. a kind of insulated gate bipolar transistor driver as claimed in claim 1, it is characterized in that: the model of described optical coupler is HCPL-0453.
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| CN108075443A (en) * | 2016-11-14 | 2018-05-25 | 上海三菱电梯有限公司 | High speed transistor short-circuit protection circuit |
| CN110098719A (en) * | 2019-06-14 | 2019-08-06 | 山西恒信风光新能源技术有限公司 | Wind power plant transducer power cabinet based on the bipolar IGBT driving structure of separating insulated grid |
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| CN108075443A (en) * | 2016-11-14 | 2018-05-25 | 上海三菱电梯有限公司 | High speed transistor short-circuit protection circuit |
| CN110098719A (en) * | 2019-06-14 | 2019-08-06 | 山西恒信风光新能源技术有限公司 | Wind power plant transducer power cabinet based on the bipolar IGBT driving structure of separating insulated grid |
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| CN103475196B (en) | 2015-12-23 |
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