CN103475196B - A kind of insulated gate bipolar transistor driver - Google Patents
A kind of insulated gate bipolar transistor driver Download PDFInfo
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- CN103475196B CN103475196B CN201310408623.8A CN201310408623A CN103475196B CN 103475196 B CN103475196 B CN 103475196B CN 201310408623 A CN201310408623 A CN 201310408623A CN 103475196 B CN103475196 B CN 103475196B
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Abstract
The invention discloses a kind of insulated gate bipolar transistor driver, comprise Isolation input unit, level conversion unit, positive-negative power allocation units, Auxiliary Power Units, driver output unit, over-current detection unit, fall grid voltage unit, postpone judging unit, soft switching unit, fault alarm output unit.When crossing flow short-circuit, over-current detection unit action, and by cross stream information be sent to respectively fall grid voltage unit and postpone judging unit, fall the action of grid voltage unit, output signal to driver output unit, reduce driving pulse; Postpone judging unit action, judge the overcurrent duration, and send instruction to soft switching unit and level conversion unit, level conversion unit carries out locking to input, soft switching unit sends shutoff instruction to driver output unit, outputs signal to short-circuit alarming unit simultaneously.The present invention adopts high-speed photoelectric coupler to isolate, and safeguard measure is complete, has signal lock-out facility, can protect the driver of IGBT to greatest extent.
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(InsulatedGateBipolarTransistor), i.e. insulated gate bipolar transistor is a kind of compound full-control type voltage driven type power semiconductor.This device is made up of double pole triode and insulating gate type field effect tube, have the advantage of low conduction voltage drop and high input impedance two aspect concurrently, possess that little, the withstand voltage coefficient of driving power is high, current carrying capacity is strong, cut-off the features such as speed is fast, saturation pressure reduction, therefore Switching Power Supply, frequency converter, lighting circuit, new forms of energy equipment is widely used in, and high power DC, alternating current machine the field such as Traction Drive, be that there is revolutionary device.
IGBT plays vital effect in the design, safe and stable operation of Circuits System, and the reliability height of IGBT will directly have influence on the operation level of whole system.Can IGBT normally work and to be closely related with the drive circuit design of IGBT, but in the middle of driver design in the past, often there is 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 IGBT, due to huge current changing rate, high voltage will be produced on loop inductance, IGBT likely can be made to puncture; 3) poor for operating short time voltage, curent change judgement, send the opening of mistake, turn off instruction, affect operating efficiency.
Summary of the invention
Technical problem to be solved by this invention is: for the defect of prior art, provides a kind of insulated gate bipolar transistor driver.Employing high-speed photoelectric coupler is isolated, and has 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, comprises Isolation input unit, level conversion unit, positive-negative power allocation units, Auxiliary Power Units, driver output unit, over-current detection unit, falls grid voltage unit, postpones judging unit, soft switching unit, fault alarm output unit;
Described Isolation input unit, positive-negative power allocation units, Auxiliary Power Units are connected with level conversion unit respectively, and level conversion unit is connected with driver output unit;
Described over-current detection unit respectively with delay judging unit, fall grid voltage unit and be connected, delay judging unit is connected with level conversion unit, soft switching unit respectively, falls grid voltage unit and is connected with driver output unit; Soft switching unit is connected with driver output unit, fault alarm output unit respectively;
When there is flow short-circuit, over-current detection unit action, and by cross stream information be sent to respectively fall grid voltage unit and postpone judging unit, fall the action of grid voltage unit, output signal to driver output unit, reduce driving pulse; Postpone judging unit action, judge the overcurrent duration, and send instruction to soft switching unit and level conversion unit, level conversion unit carries out locking to input, soft switching unit sends shutoff instruction to driver output unit, outputs signal to short-circuit alarming unit simultaneously.
Circuit structure of the present invention is specific as follows:
Comprise No. 1 port to 14 port, voltage-stabiliser tube, first diode to the 8th diode, the first to the 6th triode, the first electric capacity is to the 11 electric capacity, first resistance is to the 18 resistance, first to fourth comparator, photoelectrical coupler, two accessory power supply ports VCC, VDD, earth terminal, the dynamic public COM contact driving device inside;
Isolation input unit comprises photoelectrical coupler and the first resistance; No. 1 port is connected with one 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 ports are 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, No. 9 ports are connected with one end of the tenth electric capacity and ground connection, the other end respectively with No. 11 ports of the tenth electric capacity, one end of 8th resistance is connected and external VCC, one end of the other end the respectively with nine resistance of the 8th resistance, one end of tenth resistance, one end of 8th electric capacity, the feeder ear of the second comparator, 8th pin of photoelectrical coupler 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 15 resistance is connected, the other end of the tenth resistance respectively with one end of the 11 resistance, one end of 3rd electric capacity, the positive input terminal of the second comparator, the positive input terminal of the first comparator, one end of 3rd resistance is connected, the other end ground connection of the 8th electric capacity, the other end of the other end the respectively with three electric capacity of the 11 resistance, 5th pin of photoelectrical coupler, No. 12 ports, one end of first electric capacity, one end of second electric capacity, the positive pole of voltage-stabiliser tube, one end of 6th resistance is connected and is connected to the dynamic public COM contact driving device inside,
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 and external VCC with voltage-stabiliser tube negative pole, and the other end of the 6th resistance is connected with the other end of the second electric capacity and ground connection;
Over-current detection unit comprises the first diode, second diode, 4th resistance, 5th resistance, 7th resistance, 16 resistance, 4th electric capacity, 9th electric capacity, 4th comparator, the negative pole of the first diode is connected with No. 14 ports, one end of positive pole the respectively with seven resistance of the first diode, the positive pole of the second diode is connected, the other end of the second diode respectively with one end of the 13 resistance, the output of the first comparator is connected, the other end respectively with No. 13 ports of the 7th resistance, one end of 4th resistance, the positive input terminal of the 4th comparator, one end of 11 electric capacity is connected, the external VDD of the other end of the 4th resistance, No. 8 ports respectively with one end of the 16 resistance, one end of 5th resistance, one end of 4th electric capacity, the negative input end of the 4th comparator is connected, and the other end of the 16 resistance connects the dynamic public COM contact driving device inside, the other end of the other end the respectively with four electric capacity of the 5th resistance, one end of 9th electric capacity is connected and external VDD, and the other end of the 9th electric capacity connects the dynamic public COM contact driving device inside,
Fall grid voltage unit and comprise the 13 resistance, 7th electric capacity, 3rd diode, second triode, one end of the other end the respectively with seven electric capacity of the 13 resistance, the base stage of the second triode is connected, the other end of the 7th electric capacity is connected and external VDD with the collector electrode of the second triode, the negative pole of emitter the respectively with three diode of the second triode, No. 5 ports, one end of 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 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, one end of the 18 resistance connects the dynamic public COM contact driving device inside, and the other end of the 18 resistance is connected with the other end of the 11 electric capacity;
Soft switching unit comprises the 3rd resistance, the 5th diode, the 3rd comparator, the 6th electric capacity, the 14 resistance, the negative input end of No. 6 port the respectively with three comparators, the positive pole of the 5th diode, one end of the 6th electric capacity, one end of the 14 resistance are connected, the other end of the 6th electric capacity is connected with the other end of the 14 resistance and is connected to VDD, 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 dynamic public COM contact driving device inside;
Fault alarm output unit comprises the second resistance, 4th diode, 6th diode, 7th diode, 8th diode, first triode, 12 resistance, 5th electric capacity, the negative pole of negative pole the respectively with five diode of the 4th 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 dynamic VDD contact, collector electrode respectively with No. 7 ports of first triode, one end of 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 collector electrode of the 3rd triode is connected with the collector electrode of the 6th triode and ground connection, the emitter of emitter the respectively with four triode of the 3rd triode, the base stage of the 5th triode, the base stage of the 6th triode are connected, the collector electrode of the 4th triode is connected and external VCC with one end of the 17 resistance, the collector electrode of the 5th triode respectively, and emitter respectively with No. 10 ports of the 5th triode, the emitter of the 6th triode are connected; No. 3, No. 4 ports are reserved port.
As 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, has following technique effect: safeguard measure is complete, can protect the driver of IGBT to greatest extent.
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, Pin2, Pin5 to Pin14 are respectively No. 1, No. 2 ports and No. 5 to No. 14 ports, D1 is voltage-stabiliser tube, D2 to D9 is respectively the first diode to the 8th diode, V1 to V6 is respectively the first to the 6th triode, C1 to C10 is respectively the first electric capacity to the tenth 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, Auxiliary Power Units, over-current detection unit, fall grid voltage unit, postpone judging unit, soft switching 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, is connected with level conversion unit.Level conversion unit connects positive-negative power allocation units and Auxiliary Power Units simultaneously, connects driver output unit subsequently; Output unit is connected with IGBT grid, realizes the driving to IGBT.Drive protection portion to divide and IGBT over-current detection unit is set, fall grid voltage unit, postpone judging unit, soft switching unit and fault alarm output unit.When there is flow short-circuit in IGBT, the action of IGBT over-current detection unit, and by cross stream information be sent to fall grid voltage unit with postpone judging unit.Fall the action of grid voltage unit, output signal to output unit, reduce driving pulse.Meanwhile, postpone judging unit action, judge the overcurrent duration, and send instruction to soft switching unit and level conversion unit, level conversion unit carries out locking to input, and soft switching unit sends shutoff instruction to driver output unit, outputs signal to 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 made up of 10 unit, comprises Isolation input unit, level conversion unit, positive-negative power allocation units, Auxiliary Power Units, over-current detection unit, falls grid voltage unit, postpones judging unit, soft switching unit, driver output unit and short-circuit alarming unit.Driver is containing 12 ports.
Circuit theory diagrams of the present invention as shown in Figure 2, wherein: No. 1, No. 2 ports are signal input part, are the input of Isolation input unit; No. 5 ports are soft switching time setting end, are an input of soft switching unit; No. 6 ports are that after short-circuit protection, start-up time, setting was held again, input to delay judging unit; No. 7 ports are fault-signal output, receive the alarm signal sent from soft switching unit; Collector emitter voltage when No. 8 ports are overcurrent arranges end; No. 9, No. 11 ports are negative terminal and the anode of the accessory power supply Vp of driver; No. 10 ports are driver output end, connect the grid of IGBT; The reference Point C OM of No. 12 port driver inside, connects positive-negative power allocation units; No. 13 ports are blind area time setting end, effectively can be reduced in that IGBT opens, loss in turn off process; No. 14 ports are IGBT current detecting end, connect the collector electrode of IGBT, as the input of over-current detection unit.
(1) Isolation input unit is made up of photoelectrical coupler U2 and resistance R1, is the input of driver, and access pwm signal, realizes electrical isolation simultaneously;
(2) level conversion unit is made up of resistance R8, R9, R10, R11, R17 and comparator U1B, receives the signal of Isolation input unit, is connected simultaneously, exports driver output unit to positive-negative power allocation units, Auxiliary Power Units;
(3) positive-negative power allocation units are by resistance R6, electric capacity C1, C2, and voltage-stabiliser tube D1 forms, and single power supply can be converted to positive voltage Vcc and negative voltage GND, export the common port ground COM into internal drive, are connected with other unit.Positive-negative power allocation units are connected with level conversion unit;
(4) VCC, GND are for external Auxiliary Power Units for driver provides auxiliary operating voltage, and VDD is the mid point of VCC and GND, and VDD voltage ratio VCC after 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 R4, R5, R7, and comparator U1D forms, and judges driver overcurrent condition, and transmit signals to fall grid voltage, postpone judging unit;
(6) fall grid voltage unit to be made up of resistance R13, electric capacity C7, diode D4, triode V2, receive the output signal of over-current detection unit for input, export simultaneously and be connected to driver output unit, reduce grid voltage;
(7) postpone judging unit to be set by resistance R18, electric capacity C11, receive over-current detection information, judge the overcurrent condition of t rear drive time of delay device.When needs turn off driver, send a signal to soft switching unit, send a signal to level conversion unit simultaneously, locking input signal, soft switching can normally be carried out;
(8) soft switching unit is by resistance R3, electric capacity C5, and comparator U1C forms, and receives the cut-off signals of self-dalay judging unit, and this signal is sent to output unit, reduce grid voltage gradually, reduces current changing rate, realizes the soft switching to driver.Over-current signal is sent to alarm unit simultaneously;
(9) output unit is made up of triode V3, V4, V5, V6 of bridging, receives from level conversion unit, the signal falling grid voltage unit, soft switching unit, is connected, sends drive singal with IGBT grid;
(10) alarm unit is by resistance R2, diode D5, D8, and triode V1 forms, and receives the signal from soft switching 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 work, PWM input signal is by port one, 2 accesses, after optical coupler is isolated, IGBT drive circuit is delivered to by level shifting circuit, after amplifying, output pwm signal is to IGBT grid, and by regulating the resistance be connected with grid to regulate the charging and discharging speed of IGBT grid.Over-current detection unit, postpone judging unit, fall grid voltage unit, soft switching unit is failure to actuate, short-circuit alarming unit is failure to actuate.
(2) overcurrent short-circuit condition
When over-current detection unit detects short circuit overcurrent signal, transmit signals to and fall grid voltage unit, fall grid voltage unit and send buck signal to driver output unit, IGBT is exported and reduces gradually.Meanwhile, over-current signal is sent to delay judging unit by over-current detection unit, after setting t time of delay, postpone judging unit and again read stream information from over-current detection unit, if overcurrent still exists, now send over-current signal to soft switching unit, the action of soft switching unit by delay judging unit, send to driver output unit and judge signal, grid voltage is reduced gradually, until turn off, avoids due to electric current Rapid Variable Design, inductance induced voltage increases suddenly, punctures IGBT.Meanwhile, postpone judging unit and send block signal to level conversion unit, avoid during soft switching, receive the hard cut-off signals from level conversion unit.Soft switching unit sends alarm signal to short-circuit alarming unit simultaneously.
(3) of short duration overcurrent short-circuit condition
When over-current detection unit detects IGBT overcurrent, fall the action of gate voltage unit, postpone judging unit simultaneously and start timing.After delay time t, again from over-current detection unit Received signal strength, if over-current signal disappears, postpone judging unit and do not send cut-off signals, driver proceeds to normal operating conditions.
Claims (1)
1. an insulated gate bipolar transistor driver, is characterized in that: comprise Isolation input unit, level conversion unit, positive-negative power allocation units, Auxiliary Power Units, driver output unit, over-current detection unit, fall grid voltage unit, postpone judging unit, soft switching unit, fault alarm output unit;
Described Isolation input unit, positive-negative power allocation units, Auxiliary Power Units are connected with level conversion unit respectively, and level conversion unit is connected with driver output unit;
Described over-current detection unit respectively with delay judging unit, fall grid voltage unit and be connected, delay judging unit is connected with level conversion unit, soft switching unit respectively, falls grid voltage unit and is connected with driver output unit; Soft switching unit is connected with driver output unit, fault alarm output unit respectively;
When there is flow short-circuit, over-current detection unit action, and by cross stream information be sent to respectively fall grid voltage unit and postpone judging unit, fall the action of grid voltage unit, output signal to driver output unit, reduce driving pulse; Postpone judging unit action, judge the overcurrent duration, and send instruction to soft switching unit and level conversion unit, level conversion unit carries out locking to input, soft switching unit sends shutoff instruction to driver output unit, outputs signal to short-circuit alarming unit simultaneously;
Wherein, the circuit structure of insulated gate bipolar transistor driver is specific as follows:
Comprise No. 1 port to 14 port, voltage-stabiliser tube, first diode to the 8th diode, the first to the 6th triode, the first electric capacity is to the 11 electric capacity, first resistance is to the 18 resistance, first to fourth comparator, photoelectrical coupler, two accessory power supply ports VCC, VDD, earth terminal, the public COM contact of internal drive;
Isolation input unit comprises photoelectrical coupler and the first resistance; No. 1 port is connected with one 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 ports are connected with the 3rd pin of photoelectrical coupler; The model of described photoelectrical coupler is HCPL-0453;
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, No. 9 ports are connected with one end of the tenth electric capacity and ground connection, the other end respectively with No. 11 ports of the tenth electric capacity, one end of 8th resistance is connected and external VCC, one end of the other end the respectively with nine resistance of the 8th resistance, one end of tenth resistance, one end of 8th electric capacity, the feeder ear of the second comparator, 8th pin of photoelectrical coupler 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 15 resistance is connected, the other end of the tenth resistance respectively with one end of the 11 resistance, one end of 3rd electric capacity, the positive input terminal of the second comparator, the positive input terminal of the first comparator, one end of 3rd resistance is connected, the other end ground connection of the 8th electric capacity, the other end of the other end the respectively with three electric capacity of the 11 resistance, 5th pin of photoelectrical coupler, No. 12 ports, one end of first electric capacity, one end of second electric capacity, the positive pole of voltage-stabiliser tube, one end of 6th resistance is connected and is connected to the public COM contact of internal drive,
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 and external VCC with voltage-stabiliser tube negative pole, and the other end of the 6th resistance is connected with the other end of the second electric capacity and ground connection;
Over-current detection unit comprises the first diode, second diode, 4th resistance, 5th resistance, 7th resistance, 16 resistance, 4th electric capacity, 9th electric capacity, 4th comparator, the negative pole of the first diode is connected with No. 14 ports, one end of positive pole the respectively with seven resistance of the first diode, the positive pole of the second diode is connected, the other end of the second diode respectively with one end of the 13 resistance, the output of the first comparator is connected, the other end respectively with No. 13 ports of the 7th resistance, one end of 4th resistance, the positive input terminal of the 4th comparator, one end of 11 electric capacity is connected, the external VDD of the other end of the 4th resistance, No. 8 ports respectively with one end of the 16 resistance, one end of 5th resistance, one end of 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 the respectively with four electric capacity of the 5th resistance, one end of 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 grid voltage unit and comprise the 13 resistance, 7th electric capacity, 3rd diode, second triode, one end of the other end the respectively with seven electric capacity of the 13 resistance, the base stage of the second triode is connected, the other end of the 7th electric capacity is connected and external VDD with the collector electrode of the second triode, the negative pole of emitter the respectively with three diode of the second triode, No. 5 ports, one end of 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 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, one 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 switching unit comprises the 3rd resistance, the 5th diode, the 3rd comparator, the 6th electric capacity, the 14 resistance, the negative input end of No. 6 port the respectively with three comparators, the positive pole of the 5th diode, one end of the 6th electric capacity, one end of the 14 resistance are connected, the other end of the 6th electric capacity is connected with the other end of the 14 resistance and is connected to VDD, 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;
Fault alarm output unit comprises the second resistance, 4th diode, 6th diode, 7th diode, 8th diode, first triode, 12 resistance, 5th electric capacity, the negative pole of negative pole the respectively with five diode of the 4th 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 VDD contact, collector electrode respectively with No. 7 ports of first triode, one end of 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 collector electrode of the 3rd triode is connected with the collector electrode of the 6th triode and ground connection, the emitter of emitter the respectively with four triode of the 3rd triode, the base stage of the 5th triode, the base stage of the 6th triode are connected, the collector electrode of the 4th triode is connected and external VCC with one end of the 17 resistance, the collector electrode of the 5th triode respectively, and emitter respectively with No. 10 ports of the 5th triode, the emitter of the 6th triode are connected; No. 3, No. 4 ports are reserved port.
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| CN108075443B (en) * | 2016-11-14 | 2020-01-03 | 上海三菱电梯有限公司 | Short-circuit protection circuit for high-speed transistor |
| 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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| US8279565B2 (en) * | 2009-02-20 | 2012-10-02 | Won-Door Corporation | Methods and systems relating to overcurrent circuit protection |
| CN101834558A (en) * | 2009-12-28 | 2010-09-15 | 南昌大学 | Vector controller of alternating current asynchronous motor |
| CN102790609B (en) * | 2011-05-17 | 2014-12-31 | 北京落木源电子技术有限公司 | Drive of insulated gate power tube |
| CN202231420U (en) * | 2011-08-30 | 2012-05-23 | 东莞市精诚电能设备有限公司 | Well-protected IGBT driver |
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