CN112583393A - IGBT gate driver based on single power supply circuit - Google Patents
IGBT gate driver based on single power supply circuit Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
Abstract
The invention discloses an IGBT grid driver based on a single power supply circuit, which comprises: the system comprises a power supply circuit, an isolation drive and fault feedback circuit; the power supply circuit converts the input alternating current into direct current and provides DC +22V and DC +6V voltages for the isolation driving and fault feedback circuits respectively; the isolation driving and fault feedback circuit receives a DC +/-15V driving signal sent by the upper computer, converts the DC +/-15V driving signal into a driving signal of the IGBT and outputs the driving signal to the IGBT, and generates a fault feedback signal to the upper computer. And detecting the state of the controlled IGBT in real time, and generating a fault latch signal to the isolation driving and fault feedback circuit. The IGBT power supply circuit realizes the control and the state monitoring of the IGBT through the single power supply circuit. The push-pull circuit controls the output waveform, and has the characteristics of simple structure, high reliability, high action speed and continuously adjustable waveform.
Description
Technical Field
The invention belongs to the technical field of control of power electronics and power automation equipment, and particularly relates to an IGBT gate driver based on a single power supply circuit.
Background
At present, the application of the IGBT driver technology at home and abroad in the field of medium and small power is mature, the driving is realized mainly by adopting a digital control mode, and the function is single; the IGBT integrates the advantages of the MOSFET and the GTR, has the characteristics of high input impedance, high switching speed, good thermal stability, reduced on-state voltage, high withstand voltage, large withstand current, and the like, and is widely used in various fields in recent years. By adopting a set of driving circuit with good performance, the switching time can be shortened, the switching loss can be reduced, the IGBT can work in a more ideal switching state, and meanwhile, the IGBT has important significance on the operation efficiency, the reliability and the safety of products. The IGBT is a voltage control type device, and a direct current voltage of tens of volts is applied between its gate and emitter, and only microampere current flows. The IGBT driver is an interface circuit between the IGBT and the DSP chip of the controller, and has the function of converting a control signal from the digital signal processor into a driving signal with enough power to realize the safe on-off of the IGBT and provide electrical isolation between the processor and the IGBT. In order to correctly and effectively protect the IGBT when the system fails, the IGBT driver also needs to provide corresponding fault protection functions such as overcurrent, overvoltage, short circuit, and the like.
In the related art, a dual power supply method is mostly adopted to limit the pulse width of the control signal input to the IGBT, the structure is complex, and the number of components is large, thereby resulting in high cost and large volume of the driver.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide an IGBT gate driver based on a single power supply circuit to meet the current requirement of miniaturization trend of high-power inverters; the driver adopts the single power supply circuit to control the IGBT grid, the output waveform is continuous and smooth, the output waveform curve can be flexibly adjusted according to the specific control requirement, different application cases can be met, and the application range is wide.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention relates to an IGBT gate driver based on a single power supply circuit, which comprises: the system comprises a power supply circuit, an isolation drive and fault feedback circuit; wherein the content of the first and second substances,
the power supply circuit is used for converting input alternating current into direct current and providing DC +22V and DC +6V voltage for the isolation driving and fault feedback circuit;
the power supply circuit includes: the first RC filter circuit is connected with the output filter circuit;
the rectification circuit converts the high-frequency alternating current into direct current of DC +22V, and the first RC filter circuit filters interference harmonic waves in the direct current; the voltage stabilizing circuit converts the DC +22V direct current into DC +6V direct current to be supplied to an isolation drive and fault feedback circuit for use; the output filter circuit further filters the DC +6V direct current, and the ripple characteristic of the DC +6V power supply is improved;
the isolation driving and fault feedback circuit receives a DC +/-15V driving signal sent by the upper computer, converts the DC +/-15V driving signal into a driving signal of the IGBT and outputs the driving signal to the IGBT, and generates a fault feedback signal to the upper computer; which comprises the following steps: isolating the drive circuit and the fault feedback circuit;
the isolation drive circuit includes: the circuit comprises a photoelectric coupler U1, a primary amplifying triode V10, triodes V9 and V17, a load circuit and a driving signal transmission circuit;
the photoelectric coupler U1 converts a DC +/-15V driving signal sent by an upper computer into a control signal, the control signal is amplified by a primary amplifying circuit triode V10 and then input to base electrodes of triodes V9 and V17, and the triodes V9 and V17 form a push-pull circuit and respectively output IGBT grid driving signals of DC +15V and DC-6V;
the load circuit is used for improving the waveform of the IGBT grid electrode driving signal and smoothing the waveform;
the drive signal transmission circuit is used for adjusting the signal level.
The fault feedback circuit includes: the circuit comprises a photoelectric coupler U2, a feedback signal driving circuit, a feedback signal self-locking circuit, a second RC filter circuit, a level conversion circuit and a state detection circuit;
the photoelectric coupler U2 realizes the photoelectric isolation of the driver and the upper computer, and feeds back a fault feedback signal to the upper computer through the photoelectric coupler;
the feedback signal driving circuit is used for driving the optocoupler and driving the optocoupler to work;
the feedback signal self-locking circuit realizes self-locking maintenance of a fault signal, and when a fault occurs, the feedback signal self-locking circuit is reset (if a drive plate is powered down), and IGBT grid driving signals are output again; if not, the driver always outputs a DC-6V IGBT closing signal;
the second RC filter circuit is used for preventing malfunction of a fault feedback signal caused by interference so as to improve the stability and reliability of the driver;
the level conversion circuit realizes the level conversion of the trigger signal;
the state detection circuit realizes the output state detection of the driver and the IGBT state detection, and then judges whether the IGBT has a fault.
The invention has the beneficial effects that:
the driver has the characteristics of simple structure, high integration level, strong anti-interference capability, high reaction speed and low energy consumption, and can meet the requirements of high-frequency and high-speed IGBT control; in addition, the driver also has the functions of overvoltage, overcurrent and abnormal protection; monitoring the state of the IGBT through an analog circuit, and triggering in a delayed manner; the push-pull circuit controls the output waveform, and has the characteristics of high action speed and continuously adjustable waveform.
The invention greatly meets the requirement of the miniaturization trend of the current high-power inverter, and is the inevitable trend of the development of the IGBT grid driver in the future.
The invention is mainly realized by using an analog circuit formed by discrete components, and has the characteristics of high flexibility and low cost.
Drawings
Fig. 1 is a schematic diagram of the operation of the actuator of the present invention.
Fig. 2 is a schematic diagram of the structure of the driver of the present invention.
Fig. 3 is a schematic diagram of a power supply circuit.
Fig. 4 is a schematic diagram of an isolated drive circuit.
Fig. 5 is a schematic diagram of a fault feedback circuit.
Fig. 6 is a schematic diagram of a floating circuit.
Fig. 7 is a schematic diagram of a drive waveform adjusting circuit.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1 and 2, an IGBT gate driver based on a single power supply circuit according to the present invention includes: the system comprises a power supply circuit, an isolation drive and fault feedback circuit; wherein the content of the first and second substances,
the power supply circuit converts the input alternating current into direct current voltage and provides DC +22V and DC +6V voltage for the isolation driving and fault feedback circuit;
the isolation driving and fault feedback circuit receives a DC +/-15V driving signal sent by the upper computer, converts the DC +/-15V driving signal into a driving signal of the IGBT and outputs the driving signal to the IGBT, and generates a fault feedback signal to the upper computer; which comprises the following steps: the isolation drive circuit and the fault feedback circuit.
The fault feedback circuit detects the state of the controlled IGBT in real time according to a driving signal sent by the upper computer and generates a fault self-locking signal to the isolation driving circuit and the upper computer.
Referring to fig. 3, the power supply circuit includes: the first RC filter circuit is connected with the output end of the output filter circuit;
diodes V1-V4 form a bridge rectifier circuit to convert the high-frequency alternating current into direct current; the K pin of V1 is connected with the K pin of V2 and then connected with the 2 pin of R1, the A pin of V1 is connected with the K pin of V3, the A pin of V2 is connected with the K pin of V4, the A pins of V3 and V4 are connected and connected with the 2 pin of a capacitor C3;
the first RC filter circuit consists of a resistor R1 and a capacitor C3, wherein a pin 1 of R1 is connected with a pin 1 of C3;
the voltage stabilizing circuit consists of a resistor R2, a resistor R3, a resistor R4 and a voltage stabilizing tube V5, wherein a pin 1 of R2 is connected with a pin 1 of R3 and then connected with a pin 1 of R1; the 2 pin of R2 is connected with the 2 pin of R3 and then connected with the 2 pin of V5; the 1 pin of V5 is connected with the 1 pin of R4, and the 2 pin of R4 is connected with the 2 pin of C3;
the output filter circuit consists of a capacitor C1, a capacitor C2, a capacitor C4 and a capacitor C5; pin 1 of C1 is connected to pin 1 of C2 and to pin 1 of R1, here named power network VCC + 22V; pin 2 of C1 is connected to pin 2 of C2 and to pin 2 of R3, here named power network VCC + 6V; pin 1 of C4 is connected to pin 1 of C5 and to pin 2 of C2; pin 2 of C4 is connected to pin 2 of C5 and to pin 2 of R4, here designated power network GND.
Referring to fig. 4, the isolation driving circuit includes: the circuit comprises a photoelectric coupler U1, a primary amplifying triode V10, secondary amplifying triodes V9 and V17, a load circuit and a driving signal transmission circuit; which controls the IGBT to turn on or off.
The photoelectric coupler U1 realizes the photoelectric isolation function between the driver and the upper level; the PWM + signal is connected to pin 2 of C8, pin 2 of U1, PWM-is connected to pin 2 of R8, pin 1 of C8 is connected to pin 1 of R8, and then is connected to pin 3 of U1, pin 8 of U1 is connected to power supply network VCC +22V, pin 6 of U1 is connected to pin 1 of resistor R6, and pin 5 of U1 is connected to power supply network GND.
The drive signal transmission circuit includes: the resistor R6, the resistor R9, the diode V6, the voltage regulator V7 and the diode V8; the resistors R6 and R9 are connected in parallel, a pin 1 of the resistor R6 is connected with a pin 1 of the resistor R9, and a pin 2 of the resistor R6 is connected with a pin 2 of the resistor R9; a pin 2 of the resistor R9 is connected with a pin 1 of the voltage regulator tube V7; a pin 2 of the voltage regulator tube V7 is connected with a pin 2 of the diode V6, and a pin 2 of the diode V6 is connected with a pin 2 of the diode V8; a pin 1 of the diode V6 is connected with a pin 2 of the resistor R5, a pin 1 of the resistor R5 is connected with a power supply network VCC +22V, a pin 1 of the diode V6 is connected with a pin 1 of the capacitor C6, a pin 2 of the capacitor C6 is connected with a power supply network VCC +22V, a pin 1 of the capacitor C6 is connected with a pin 2 of the primary amplification triode V10, and a network node FB1 is defined herein; a pin 3 of the primary amplification triode V10 is connected with a power supply network VCC +22V, a pin 1 of the primary amplification triode V10 is connected with a pin 1 of a resistor R12, a network node FB2 is defined here, a pin 2 of the resistor R12 is connected with a pin 1 of a resistor R15, and a pin 2 of the R15 is connected with a power supply network GND; a pin 1 of the diode V8 is connected with a pin 1 of the diode V13 and is connected with a pin 1 of the first-stage amplifying triode V10; a pin 2 of the diode V13 is connected to a pin 1 of the resistor R16, which defines the network node FB3, and a pin 2 of the resistor R16 is connected to the power supply network GND;
the two-stage amplifying triode V9 and V17 circuits are characterized in that a pin 1 of a triode V9 is connected with pins 1 of resistors R10 and R11; a pin 2 of the resistor R10 is connected with a pin 2 of the resistor R11 and is connected with a pin 1 of the diode V8; a pin 2 of the triode V9 is connected with a power supply network VCC +22V, a pin 3 of the triode V9 is connected with a pin 3 of the triode V17, a pin 1 of the triode V17 is connected with a pin 1 of the triode V9, and a pin 3 of the triode V17 is connected with a power supply network GND; a pin 1 of the diode V12 is connected to a pin 3 of the transistor V9, a pin 2 of the diode V12 is connected to a pin 2 of the resistor R14, and a pin 1 of the resistor R14 is connected to a pin 3 of the output terminal X1, where a network node FB4 is defined; a pin 2 of the resistor R13 is connected with a pin 1 of the diode V12, and a pin 1 of the resistor R13 is connected with a pin 2 of the diode V12; pin 1 of diode V15 is connected to pin 3 of output terminal X1, pin 2 of diode V16 is connected, pin 2 of diode V15 is connected to pin 1 of capacitor C9, and pin 1 of diode V16 is connected to power supply network GND.
The load circuit is composed of a resistor R7, a diode V11, a diode V14, a resistor R17 and a capacitor C9; a pin 1 of the resistor R7 is connected with a power supply network VCC +22V, and a pin 2 of the resistor R7 is connected with a pin 1 of the diode V11; a pin 2 of the diode V11 is connected with a pin 1 of the diode V14, a pin 2 of the diode V14 is connected with a pin 1 of the resistor R17, and a pin 2 of the resistor R17 is connected with a power supply network VCC + 6V; a pin 1 of the capacitor C9 is connected with a pin 1 of the resistor R17, and a pin 2 of the capacitor C9 is connected with a pin 2 of the resistor R17.
Referring to fig. 5, the fault feedback circuit includes: the circuit comprises a photoelectric coupler U2, a feedback signal driving circuit, a feedback signal self-locking circuit, a second RC filter circuit, a level conversion circuit and a state detection circuit;
the photoelectric coupler U2 realizes the photoelectric isolation function of the driver and the upper computer, and the pin 8 of the photoelectric coupler U2 is connected with a VCC +15V power supply of the upper computer; a pin 6 of the photoelectric coupler U2 is connected with a feedback signal of the upper computer, and a pin 5 of the photoelectric coupler U2 is connected with the GND of the upper computer; a pin 2 of the capacitor C11 is connected with a pin 8 of the photoelectric coupler U2, and a pin 1 of the capacitor C11 is connected with a pin 5 of the photoelectric coupler U2; a pin 2 of the capacitor C12 is connected with a pin 6 of a photoelectric coupler U2, a pin 1 of the capacitor C12 is connected with a pin 5 of a photoelectric coupler U2, a pin 2 of the photoelectric coupler U2 is connected with a pin 2 of the resistor R20, and a pin 3 of the photoelectric coupler U2 is connected with a pin 1 of the diode V24;
the feedback signal driving circuit realizes the driving function of the optocoupler U2, and enhances the driving capability of the feedback signal so as to drive the optocoupler U2 to normally work. The feedback signal driving circuit is composed of a resistor R20, a resistor R21, a resistor R22, a diode V24 and a diode V32; 1 pin of the resistors R20, R21 and R22 are connected together and are connected with a power supply network VCC +22V, and 2 pins of the resistors R20, R21 and R22 are connected together and are connected with a 2 pin of a photoelectric coupler U2; a pin 2 of the diode V24 is connected with a pin 1 of the diode V32, and a pin 2 of the diode V32 is connected with the power supply network GND; a pin 1 of the triode V28 is connected with a pin 2 of the resistor R20, a pin 3 of the triode V28 is connected with a power supply network GND, a pin 2 of the triode V28 is connected with a pin 1 of the resistor R30, and a pin 2 of the resistor R30 is connected with a pin 2 of the resistor R25;
the feedback signal self-locking circuit is composed of a resistor R19, a resistor R23, a capacitor C10, a triode V25, a triode V19 and a resistor R25; the resistor R19 is connected with the capacitor C10 in parallel, a pin 1 of the resistor R19 is connected with a pin 2 of the capacitor C10 and is connected to a power supply network VCC +22V, a pin 2 of the resistor R19 is connected with a pin 1 of the capacitor C10 and is connected with a pin 2 of the triode V19 and a pin 1 of the resistor R23; a pin 2 of the resistor R23 is connected with a pin 1 of the triode V25, a pin 3 of the triode V25 is connected with GND, and the triode V25 is connected with a pin 2 of the resistor R29; a pin 3 of the triode V19 is connected with a power supply network VCC +22V, and a pin 1 of the triode V19 is connected with a pin 1 of the resistor R25; a pin 2 of the resistor R25 is connected with a pin 1 of the resistor R29, a pin 1 of the resistor R29 is connected with a pin 1 of the resistor R31, and a pin 2 of the resistor R31 is connected with GND;
the second RC filter circuit is used for preventing the malfunction of the fault feedback circuit caused by interference so as to improve the stability and reliability of the driver; the RC filter circuit is composed of a resistor R31 and a capacitor C13, the capacitor C13 is connected with the resistor R31 in parallel, a pin 2 of the capacitor C13 is connected with a pin 1 of the resistor R31, and a pin 1 of the capacitor C13 is connected with a pin 2 of the resistor R31;
the level conversion circuit is used for realizing level conversion of signals, so that the circuit can receive 22V signals. The level conversion battery is composed of a voltage regulator tube V29, a diode V30, a resistor R28 and a diode V33; a pin 2 of the voltage regulator tube V29 is connected with a pin 2 of the diode V30, a pin 1 of the diode V30 is connected with a pin 1 of the diode V33, and a pin 2 of the diode V33 is connected with the FB 3; the resistor R28 is connected with the diode V33 in parallel, a pin 2 of the resistor R28 is connected with a pin 1 of the diode V33, and a pin 1 of the resistor R28 is connected with a pin 2 of the V33;
the state detection circuit is used for detecting the state of the IGBT and the state of the driving signal. The state detection circuit is composed of a diode V20, a diode V23, a resistor R26, a resistor R24, a resistor R27, a diode V26, a resistor R18, a diode V18, a TVS tube V21, a TVS tube V22, a TVS tube V27 and a diode V31;
a pin 2 of the resistor R24 is connected with a pin 2 of the resistor R23, and a pin 1 of the resistor R24 is connected with the FB 1; a pin 2 of the resistor R27 is connected with a pin 2 of the resistor R24, a pin 1 of the resistor R27 is connected with a pin 2 of the V26, and a pin 1 of the V26 is connected with the FB 2;
a pin 2 of the resistor R26 is connected to the GND network, a pin 1 of the resistor R26 is connected with a pin 2 of the diode V23, a pin 1 of the diode V23 is connected with a pin 1 of the capacitor C14, and a pin 2 of the capacitor C14 is connected to the GND network; a pin 2 of the diode V23 is connected with a pin 1 of the diode V20, and a pin 2 of the diode V20 is connected with a power supply network VCC + 22V;
a pin 1 of the resistor R18 is connected with a pin 1 of the resistor R26, and a pin 2 of the resistor R18 is connected with a pin 1 of the diode V18; a pin 2 of the diode V18 is connected with a pin 2 of the TVS tube V21 and is connected with a pin 1 of the X1, a pin 1 of the TVS tube V21 is connected with a pin 2 of the TVS tube V22, a pin 1 of the TVS tube V22 is connected with a pin 2 of the TVS tube V27, and a pin 1 of the TVS tube V27 is connected with a pin 1 of the diode V31; the 2 pin of the diode V31 is connected to the 3 pin of X1 and to FB 4.
The driver can receive +/-15V driving signals of the upper computer, and can adapt to the driving signals of the upper computer with different voltage levels after the current-limiting resistor is modified, so that the driver has wide applicability. And adjusting the driving model to be +15V/-6V driving signals required for driving the IGBT grid; by adopting a +22V single power supply and a +6V floating technology, the IGBT can be effectively driven, and the grid electrode of the IGBT can not be damaged under the fault condition, so that the reliability and the stability of the frequency converter can be improved, as shown in fig. 6.
Meanwhile, the driver provided by the invention is provided with an output waveform adjusting circuit, can adapt to the IGBTs of various signals, and therefore has wide applicability, as shown in FIG. 7.
The IGBT is driven by the single power supply, and compared with the traditional double-power-supply driver, the IGBT driving device has the characteristics of simple structure, few components, high reliability and low cost. The specific implementation mode is to adopt the design concept of the floating ground, connect the E pole of the IGBT with a VCC +6V network and use the E pole as the gate of the IGBT as the floating ground. The power supply voltage of the whole circuit is 22V, and even the driver outputs 22V, the IGBT grid is not easy to break down due to overvoltage, so that the fault amplification can be effectively prevented. The IGBT turn-off driving voltage is set to be-6V, and compared with the-10V or-15V turn-off driving voltage, the IGBT turn-off reliability can be guaranteed, and the IGBT turn-on action speed can be improved.
In addition, the invention designs the IGBT grid driving waveform adjusting circuit, so that the driver can be adapted to various types of IGBTs, and the design has wide practicability.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (1)
1. An IGBT gate driver based on a single power supply circuit, comprising: the system comprises a power supply circuit, an isolation drive and fault feedback circuit;
the power supply circuit is used for converting input alternating current into direct current and providing DC +22V and DC +6V voltage for the isolation driving and fault feedback circuit;
the power supply circuit includes: the first RC filter circuit is connected with the output filter circuit;
the rectification circuit converts the high-frequency alternating current into direct current of DC +22V, and the first RC filter circuit filters interference harmonic waves in the direct current; the voltage stabilizing circuit converts the DC +22V direct current into DC +6V direct current to be supplied to an isolation drive and fault feedback circuit for use; the output filter circuit further filters the DC +6V direct current, and the ripple characteristic of the DC +6V power supply is improved;
the isolation driving and fault feedback circuit receives a DC +/-15V driving signal sent by the upper computer, converts the DC +/-15V driving signal into a driving signal of the IGBT and outputs the driving signal to the IGBT, and generates a fault feedback signal to the upper computer; which comprises the following steps: isolating the drive circuit and the fault feedback circuit;
the isolation drive circuit includes: the circuit comprises a photoelectric coupler U1, a primary amplifying triode V10, triodes V9 and V17, a load circuit and a driving signal transmission circuit;
the photoelectric coupler U1 converts a DC +/-15V driving signal sent by an upper computer into a control signal, the control signal is amplified by a primary amplifying circuit triode V10 and then input to base electrodes of triodes V9 and V17, and the triodes V9 and V17 form a push-pull circuit and respectively output IGBT grid driving signals of DC +15V and DC-6V;
the load circuit is used for improving the waveform of the IGBT grid electrode driving signal and smoothing the waveform;
the driving signal transmission circuit is used for adjusting the signal level;
the fault feedback circuit includes: the circuit comprises a photoelectric coupler U2, a feedback signal driving circuit, a feedback signal self-locking circuit, a second RC filter circuit, a level conversion circuit and a state detection circuit;
the photoelectric coupler U2 realizes the photoelectric isolation of the driver and the upper computer, and feeds back a fault feedback signal to the upper computer through the photoelectric coupler;
the feedback signal driving circuit is used for driving the optocoupler and driving the optocoupler to work;
the feedback signal self-locking circuit realizes self-locking maintenance of the fault signal;
the second RC filter circuit is used for preventing malfunction of a fault feedback signal caused by interference;
the level conversion circuit realizes the level conversion of the trigger signal;
the state detection circuit realizes the output state detection of the driver and the IGBT state detection and judges whether the IGBT has a fault or not.
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| CA2852963A1 (en) * | 2013-06-13 | 2014-12-13 | General Electric Company | Insulated gate bipolar transistor failure mode detection and protection system and method |
| CN104270129A (en) * | 2014-09-26 | 2015-01-07 | 永济新时速电机电器有限责任公司 | IGBT driving receiving and fault feedback circuit of converter |
| US20170149431A1 (en) * | 2015-07-15 | 2017-05-25 | Boe Technology Group Co., Ltd. | Insulated gate bipolar transistor driving circuit |
| CN108988619A (en) * | 2018-06-22 | 2018-12-11 | 浙江海得新能源有限公司 | A kind of IGBT module driving circuit suitable for high-power inverter |
| CN109450230A (en) * | 2018-10-24 | 2019-03-08 | 南京轨道交通系统工程有限公司 | A kind of IGBT gate drivers based on analog circuit |
| CN110365197A (en) * | 2019-08-15 | 2019-10-22 | 上海地铁电子科技有限公司 | Subway train draws inverter module driving plate |
| CN111010147A (en) * | 2019-12-04 | 2020-04-14 | 南京轨道交通系统工程有限公司 | IGBT gate driver of double-slope peak suppression analog circuit |
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