阅读说明：本技术 一种用于轨道车辆的辅助逆变模块驱动板 (Auxiliary inverter module driving plate for railway vehicle ) 是由 胡学峰 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种用于轨道车辆的辅助逆变模块驱动板,包括：DC/DC电源、驱动信号光耦隔离电路、驱动IGBT分配板、硬件自检及保护电路和故障信号光耦隔离电路；辅助系统控制器与驱动信号光耦隔离电路通讯连接；硬件自检及保护电路与故障信号光耦隔离电路通讯连接,故障信号光耦隔离电路与辅助系统控制器通讯连接。本发明通过在辅助逆变模块驱动板的板卡中设置驱动IGBT分配板,IGBT驱动信号经接插件与被控IGBT模块通过一块独立的驱动IGBT分配板进行信号传输,更换方便,可实现对不同型号IGBT进行控制,从而实现兼容替代多品牌辅助逆变系统。(The invention discloses an auxiliary inverter module driving board for a railway vehicle, which comprises: the system comprises a DC/DC power supply, a driving signal optical coupling isolation circuit, a driving IGBT distributing plate, a hardware self-checking and protecting circuit and a fault signal optical coupling isolation circuit; the auxiliary system controller is in communication connection with the drive signal optical coupling isolation circuit; the hardware self-checking and protecting circuit is in communication connection with the fault signal optical coupling isolating circuit, and the fault signal optical coupling isolating circuit is in communication connection with the auxiliary system controller. According to the invention, the driving IGBT distributing plate is arranged in the board card of the auxiliary inverter module driving plate, and the IGBT driving signal is transmitted with the controlled IGBT module through the independent driving IGBT distributing plate through the connector, so that the replacement is convenient, and the control of different types of IGBTs can be realized, thereby realizing the compatible substitution of multi-brand auxiliary inverter systems.)

1. An auxiliary inverter module drive board for a rail vehicle, comprising: the device comprises a DC/DC power supply, a driving signal optical coupling isolation circuit, a driving signal amplification circuit, a driving IGBT distributing plate, a hardware self-checking and protecting circuit and a fault signal optical coupling isolation circuit;

the DC/DC power supply comprises an isolation step-up transformer;

a direct current power supply module of the railway vehicle is connected with the primary side receiving side of the isolation boosting transformer and provides a set direct current power supply for the DC/DC power supply;

the DC/DC power supply provides set power supplies for the driving signal optical coupling isolation circuit, the driving signal amplification circuit and the hardware self-checking and protection circuit respectively;

an auxiliary system controller of the rail vehicle is in communication connection with the driving signal optical coupling isolation circuit;

the drive signal optical coupling isolation circuit is in communication connection with the drive signal amplification circuit;

the driving signal amplifying circuit is respectively in communication connection with the driving IGBT distributing plate and the hardware self-checking and protecting circuit;

a controlled IGBT module is externally connected to the driving IGBT distribution plate;

the hardware self-checking and protecting circuit is in communication connection with the fault signal optical coupling isolating circuit, and the fault signal optical coupling isolating circuit is in communication connection with the auxiliary system controller.

2. The auxiliary inverter module driving board for a railway vehicle according to claim 1, wherein the DC/DC power supply further comprises a power control chip, a first plug connector and a full-wave bridge rectifier, and the DC power supply module is connected to the DC/DC power supply through the power control chip; the DC/DC power supply is connected with the driving signal optical coupling isolation circuit through the first connector clip and is used for outputting a set DC power supply for the driving signal optical coupling isolation circuit; the input end of the bridge full-wave rectifier is connected with the secondary side of the isolation boosting transformer; the output end of the bridge type full-wave rectifier can provide set first positive voltage and first negative voltage for a rear-stage board card of the auxiliary inverter module driving board.

3. The auxiliary inverter module driving board for a railway vehicle according to claim 2, wherein the DC/DC power supply further comprises a three-terminal regulator chip, and the DC/DC power supply is further connected to the driving signal optical coupler isolation circuit through the three-terminal regulator chip, so as to output a set DC regulated power supply for the driving signal optical coupler isolation circuit.

4. The auxiliary inverter module drive board for a railway vehicle according to claim 3, wherein the DC/DC power supply further comprises a half-wave rectifier having an input connected to the secondary side of the isolated step-up transformer; the output end of the half-wave rectifier is connected with the first positive voltage in series and can provide reference voltage for detecting the IGBT.

5. The auxiliary inverter module driving board for a railway vehicle according to claim 4, wherein the driving signal optical coupler isolation circuit comprises an optical coupler, and the optical coupler is used for receiving the PWM pulse signal sent by the auxiliary system controller through the first connector and performing photoelectric isolation.

6. The auxiliary inverter module driving board for a railway vehicle according to claim 5, wherein the input end of the optocoupler is provided with a hardware interlock for preventing a through short circuit of the controlled IGBT module.

7. The auxiliary inverter module driver board for a rail vehicle of claim 6, wherein the driving signal optocoupler isolation circuit further comprises a first triode, a first MOSFET, a second connector and a third connector, wherein the first triode and the first MOSFET form a push-pull output for lossless output of the driving signal to the next stage via the second and third connectors.

8. The auxiliary inverter module drive board for a rail vehicle of claim 7, wherein the hardware self-test and protection circuit comprises a board power self-test circuit, a drive signal and controlled IGBT status feedback, the board power self-test circuit comprising a monostable flip-flop configured to detect an abnormal condition of the first positive voltage, the first negative voltage and the reference voltage and to issue a static fault signal based on the abnormal condition.

9. The auxiliary inverter module driver board for a railway vehicle according to claim 8, wherein the hardware self-test and protection circuit comprises a second transistor and a third transistor, and the second transistor and the third transistor are configured to convert the static fault signal and output the static fault signal to a base of the driving signal opto-coupler isolation circuit.

10. The auxiliary inverter module driver board for a railway vehicle of claim 9, wherein the fault signal opto-isolator circuit comprises a fourth transistor configured to construct the fault signal opto-isolator circuit as an open collector configuration.

Technical Field

The invention relates to the technical field of auxiliary power supply systems of railway vehicles, in particular to an auxiliary inverter module driving plate for a railway vehicle.

Background

The battery charger module and the auxiliary inversion module are core components of an auxiliary power supply system of the railway vehicle, and 1500V or 750V direct current of a contact net of the railway vehicle is inverted into alternating current with adjustable voltage and frequency through pulse width modulation, so that the alternating current is used for equipment such as illumination, air conditioning, monitoring and the like of the railway vehicle. The driving board is a core control component of the driving board, is mainly used for driving the IGBT to be switched on and switched off, and has the functions of overcurrent protection and static feedback IGBT fault.

Along with the increase of the operation age of the rail vehicles, the faults of the rail vehicles are frequent due to the gradual aging of electronic components, the safe and efficient operation of the rail traffic is severely restricted, and more rail vehicles need to replace the corresponding electronic components. The auxiliary inverter module driving board is used as one of the parts with higher failure rate in the auxiliary inverter system of the railway vehicle, the original auxiliary inverter module driving board is mainly imported from abroad, the price is high, the supply period is long, and the maintenance efficiency is seriously influenced; the auxiliary inverter module driving board assembled by a maintenance manufacturer can only meet the practical requirement of a brand auxiliary inverter module system, and the driving board card is poor in operation compatibility and stability.

Therefore, there is a need in the art for an auxiliary inverter module driver board with simplified configuration, good compatibility, and stable and reliable operation.

Disclosure of Invention

In order to solve the technical problems, the invention provides an auxiliary inverter module driving board which is optimized in configuration, efficient in production, good in compatibility and stable and reliable in operation.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the invention discloses an auxiliary inverter module driving board for a railway vehicle, which comprises: the device comprises a DC/DC power supply, a driving signal optical coupling isolation circuit, a driving signal amplification circuit, a driving IGBT distributing plate, a hardware self-checking and protecting circuit and a fault signal optical coupling isolation circuit; the DC/DC power supply comprises an isolation step-up transformer; a direct current power supply module of the railway vehicle is connected with the primary side receiving side of the isolation boosting transformer and provides a set direct current power supply for the DC/DC power supply; the DC/DC power supply provides set power supplies for the driving signal optical coupling isolation circuit, the driving signal amplification circuit and the hardware self-checking and protection circuit respectively; an auxiliary system controller of the rail vehicle is in communication connection with the driving signal optical coupling isolation circuit; the drive signal optical coupling isolation circuit is in communication connection with the drive signal amplification circuit; the driving signal amplifying circuit is respectively in communication connection with the driving IGBT distributing plate and the hardware self-checking and protecting circuit; a controlled IGBT module is externally connected to the driving IGBT distribution plate; the hardware self-checking and protecting circuit is in communication connection with the fault signal optical coupling isolating circuit, and the fault signal optical coupling isolating circuit is in communication connection with the auxiliary system controller.

The beneficial effect of adopting above-mentioned technical scheme is: the problems of high price and long period of original products and poor compatibility and stability of assembled products existing in an auxiliary inversion module driving board in the prior art are fully considered, the IGBT distribution board is driven to be arranged in the board card of the auxiliary inversion module driving board, IGBT driving signals are transmitted between the connector and the controlled IGBT module through the independent driving IGBT distribution board, the replacement is convenient, the control of different types of IGBTs can be realized, and the convenience and flexibility are realized, so that a multi-brand auxiliary inversion system is compatibly replaced; secondly, the direct-current power supply module is adopted to supply power for the DC/DC power supply, so that the board card design of the direct-current power supply module is simplified; in addition, the auxiliary inverter module driving board adopts a double-board design, so that one auxiliary inverter module driving board can drive two IGBTs on a single bridge arm of the auxiliary inverter, and the configuration cost is effectively reduced.

As a further improvement of the technical scheme of the invention, the DC/DC power supply further comprises a power control chip, a first plug connector and a bridge full-wave rectifier, and the DC power supply module is connected with the DC/DC power supply through the power control chip; the DC/DC power supply is connected with the driving signal optical coupling isolation circuit through the first connector clip and is used for outputting a set DC power supply for the driving signal optical coupling isolation circuit; the input end of the bridge full-wave rectifier is connected with the secondary side of the isolation boosting transformer; the output end of the bridge type full-wave rectifier can provide set first positive voltage and first negative voltage for a rear-stage board card of the auxiliary inverter module driving board.

As a further improvement of the technical solution of the present invention, the DC/DC power supply further includes a three-terminal voltage stabilization chip, and the DC/DC power supply is further connected to the driving signal optical coupling isolation circuit through the three-terminal voltage stabilization chip, and is configured to output a set DC voltage stabilization power to the driving signal optical coupling isolation circuit.

The beneficial effect of adopting above-mentioned technical scheme is: the three-terminal voltage stabilization chip is beneficial to stabilizing direct-current voltage and improving the stability of the voltage.

As a further improvement of the technical scheme of the invention, the DC/DC power supply further comprises a half-wave rectifier, wherein the input end of the half-wave rectifier is connected with the secondary side of the isolation boosting transformer; the output end of the half-wave rectifier is connected with the first positive voltage in series and can provide reference voltage for detecting the IGBT.

The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the half-wave rectifier provides a reference voltage for the IGBT VCE detection loop.

As a further improvement of the technical solution of the present invention, the driving signal optical coupler isolation circuit includes an optical coupler, and the optical coupler is configured to receive the PWM pulse signal sent by the auxiliary system controller through the first connector and perform photoelectric isolation.

As a further improvement of the technical scheme of the invention, the input end of the optocoupler is provided with hardware interlock for preventing the controlled IGBT module from being in through short circuit.

The beneficial effect of adopting above-mentioned technical scheme is: under the condition that one auxiliary inverter module driving board can drive two IGBTs on a single bridge arm of an auxiliary inverter, hardware interlocking is arranged at the input end of the optocoupler, namely, the IGBT driving signals of upper and lower bridges of the same bridge arm are subjected to interlocking design, so that the phenomenon of IGBT explosion caused by penetration of the same bridge arm can be effectively avoided.

As a further improvement of the technical solution of the present invention, the driving signal optical coupling isolation circuit further includes a first triode, a first MOSFET tube, a second plug connector, and a third plug connector, where the first triode and the first MOSFET tube form a push-pull output for outputting the driving signal to the next stage through the second plug connector and the third plug connector without loss.

The beneficial effect of adopting above-mentioned technical scheme is: the driving capability of the control signal sent by the power control chip can be obviously enhanced through a push-pull design.

As a further improvement of the technical solution of the present invention, the hardware self-test and protection circuit includes a board power self-test circuit, a driving signal, and a controlled IGBT state feedback, where the board power self-test circuit includes a monostable flip-flop for detecting abnormal conditions of the first positive voltage, the first negative voltage, and the reference voltage, and sending a static fault signal according to the abnormal conditions.

The beneficial effect of adopting above-mentioned technical scheme is: by adopting the design of a static fault signal mode, the controller can more flexibly master the real-time state and the fault of the controlled IGBT, so that a fault point can be more accurately judged, and the troubleshooting cost during the fault is greatly reduced.

As a further improvement of the technical solution of the present invention, the hardware self-checking and protecting circuit includes a second triode and a third triode, and the second triode and the third triode are used for converting the static fault signal and outputting the static fault signal to the base of the driving signal opto-coupler isolating circuit.

As a further improvement of the technical solution of the present invention, the fault signal optical coupling isolation circuit includes a fourth triode, and the fourth triode is used for constructing the fault signal optical coupling isolation circuit into an open collector structure.

The beneficial effect of adopting above-mentioned technical scheme is: the fault signal optical coupling isolation circuit realizes open collector design by controlling T4, and the butt joint of the auxiliary inversion module drive board and different level controllers can be realized only by adjusting the first positive voltage supplied by the collector of the fourth triode, so that the compatibility of the auxiliary inversion module drive board is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic view of the topology of the auxiliary inverter module driver board of the present invention;

FIG. 2 is a schematic diagram of the power control chip connection of the DC/DC power supply of the present invention;

FIG. 3 is a power supply schematic of the DC/DC power supply of the present invention;

FIG. 4 is a schematic view of a first connector of the DC/DC power supply of the present invention;

FIG. 5 is a schematic diagram of a first portion of a driving signal optical coupler and isolator circuit and a signal amplifier circuit according to the present invention;

FIG. 6 is a second partial schematic diagram of a driving signal optical coupler and isolator circuit and a signal amplifier circuit according to the present invention;

FIG. 7 is a schematic diagram of a second connector and a third connector of the drive signal opto-coupler isolation circuit according to the present invention;

FIG. 8 is a schematic diagram of a hardware self-test and protection circuit according to the present invention;

fig. 9 is a schematic diagram of a fault signal optical coupler isolation circuit according to the present invention.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In order to realize the purpose of the invention, the technical scheme provided by the invention is as follows:

in some embodiments of the present invention, as shown in fig. 1, an auxiliary inverter module driving board for a railway vehicle is disclosed, comprising: the device comprises a DC/DC power supply, a driving signal optical coupling isolation circuit, a driving signal amplification circuit, a driving IGBT distributing plate, a hardware self-checking and protecting circuit and a fault signal optical coupling isolation circuit; a DC/DC power supply including an isolation step-up transformer; the direct current power supply module of the rail vehicle is connected with the primary side receiving side of the isolation boosting transformer and provides a set direct current power supply for the DC/DC power supply; the DC/DC power supply provides set power supply for the drive signal optical coupling isolation circuit, the drive signal amplification circuit and the hardware self-checking and protection circuit respectively; the auxiliary system controller of the railway vehicle is in communication connection with the drive signal optical coupling isolation circuit; the drive signal optical coupling isolation circuit is in communication connection with the drive signal amplification circuit; the driving signal amplifying circuit is respectively in communication connection with the driving IGBT distributing plate and the hardware self-checking and protecting circuit; a controlled IGBT module is externally connected to the driving IGBT distribution plate; the hardware self-checking and protecting circuit is in communication connection with the fault signal optical coupling isolating circuit, and the fault signal optical coupling isolating circuit is in communication connection with the auxiliary system controller.

The beneficial effect of adopting above-mentioned technical scheme is: the problems of high price and long period of original products and poor compatibility and stability of assembled products existing in an auxiliary inversion module driving board in the prior art are fully considered, the IGBT distribution board is driven to be arranged in the board card of the auxiliary inversion module driving board, IGBT driving signals are transmitted between the connector and the controlled IGBT module through the independent driving IGBT distribution board, the replacement is convenient, the control of different types of IGBTs can be realized, and the convenience and flexibility are realized, so that a multi-brand auxiliary inversion system is compatibly replaced; secondly, the direct-current power supply module is adopted to supply power for the DC/DC power supply, so that the board card design of the direct-current power supply module is simplified; in addition, the auxiliary inverter module driving board adopts a double-board design, so that one auxiliary inverter module driving board can drive two IGBTs on a single bridge arm of the auxiliary inverter, and the configuration cost is effectively reduced.

In other embodiments of the present invention, as shown in fig. 2 to 4, the DC/DC power supply further includes a power control chip, a first plug connector, and a bridge full-wave rectifier, wherein the DC power supply module is connected to the DC/DC power supply through the power control chip; the DC/DC power supply is connected with the drive signal optical coupling isolation circuit through a first connector clip and is used for outputting a set DC power supply for the drive signal optical coupling isolation circuit; the input end of the bridge full-wave rectifier is connected with the secondary side of the isolation boosting transformer; the output end of the bridge type full-wave rectifier can provide a set first positive voltage and a set first negative voltage for a rear-stage board card of the auxiliary inverter module driving board. For example: the direct current power supply module passes through first connector X1 for auxiliary inverter module drive plate through direct current power VCC 15V, drives through power control chip A2 and keeps apart step-up transformer TR1 and TR2, keeps apart the first positive voltage +15V of output and first negative voltage-12V through bridge type full wave rectifier after the secondary side of transformer TR1 and TR2 steps up, provides working power for the back level board card.

In other embodiments of the present invention, as shown in fig. 3, the DC/DC power supply further includes a three-terminal regulator chip, and the DC/DC power supply is further connected to the driving signal optical coupler isolation circuit through the three-terminal regulator chip, so as to output a set DC regulated power supply for the driving signal optical coupler isolation circuit. For example: the first positive voltage +15V is isolated and stabilized by a three-terminal voltage stabilizing chip A1 to be output as a 15V direct current stabilized voltage power supply required by the later stage.

The beneficial effect of adopting above-mentioned technical scheme is: the three-terminal voltage stabilization chip is beneficial to stabilizing direct-current voltage and improving the stability of the voltage.

In other embodiments of the present invention, as shown in fig. 3, the DC/DC power supply further comprises a half-wave rectifier, an input terminal of the half-wave rectifier being connected to the secondary side of the isolated step-up transformer; the output end of the half-wave rectifier is connected with the first positive voltage in series and can provide reference voltage for detecting the IGBT. For example: the other path of the secondary side of the isolation boosting transformer is connected with a first positive voltage +15V in series through a half-wave rectifier, so that the output VCE _ HTx is +35V direct current, and a reference voltage is provided for the fault signal optical coupling isolation circuit.

The beneficial effect of adopting above-mentioned technical scheme is: the arrangement of the half-wave rectifier provides a reference voltage for the IGBT VCE detection loop.

In other embodiments of the present invention, as shown in fig. 5 and 6, the driving signal optical coupler isolation circuit includes an optical coupler, and the optical coupler is configured to receive the PWM pulse signal sent by the auxiliary system controller through the first connector and perform photoelectric isolation. The input end of the optocoupler is provided with hardware interlock for preventing the controlled IGBT module from being communicated and short-circuited. For example: the PWM pulse signal (IN +, IN-) sent by the auxiliary system controller is transmitted to the optocoupler U5/U6 through the first connector X1 for photoelectric isolation and is transmitted to the later stage. The input end of the optocoupler U5/U6 adopts a hardware interlocking design so as to avoid the two controlled IGBT modules from being in through short circuit.

The beneficial effect of adopting above-mentioned technical scheme is: under the condition that one auxiliary inverter module driving board can drive two IGBTs on a single bridge arm of an auxiliary inverter, hardware interlocking is arranged at the input end of the optocoupler, namely, the IGBT driving signals of upper and lower bridges of the same bridge arm are subjected to interlocking design, so that the phenomenon of IGBT explosion caused by penetration of the same bridge arm can be effectively avoided.

In other embodiments of the present invention, as shown in fig. 5 to 7, the driving signal optical coupling isolation circuit further includes a first triode, a first MOSFET tube, a second plug connector, and a third plug connector, where the first triode and the first MOSFET tube form a push-pull output for lossless output of the driving signal to the next stage through the second plug connector and the third plug connector. For example: in addition, the output signal of the optocoupler U5/U6 is subjected to gradual amplification of the loading capacity of the driving signal through the first triode, finally, the first triode V1 and the first MOSFET V2 are controlled to transmit the driving signal to the next stage through the second plug connector X2 and the third plug connector X3 in a lossless manner through a push-pull design, and the Prot _ HTx signal is the driving signal for self-blocking the controlled IGBT module when the auxiliary inverter module driving board detects an abnormal fault.

By adopting the open type design, the driving signals of the controlled IGBT module are transmitted with the controlled IGBT module through the X2 and X3 connectors through an independent driving IGBT distribution board. The advantage lies in, changes different specifications drive IGBT break-over plate, can realize controlling different models controlled IGBT module, and is convenient nimble to realize the compatible purpose that replaces the drive scheme of many brands of assisting contrary systems.

The beneficial effect of adopting above-mentioned technical scheme is: the driving capability of the control signal sent by the power control chip can be obviously enhanced through a push-pull design. For example: and control signals sent by the power supply control chip A2 are respectively controlled by MOSFETs (V9, V10) on and off of the primary side of the isolation boosting transformer through a push-pull design (V49-V53).

In other embodiments of the present invention, as shown in fig. 5-7, the hardware self-test and protection circuit includes a board power self-test circuit, a driving signal, and a controlled IGBT status feedback, where the board power self-test circuit includes a monostable flip-flop for detecting abnormal conditions of the first positive voltage, the first negative voltage, and the reference voltage and sending a static fault signal according to the abnormal conditions. For example: the monostable flip-flop is built through a chip A9, when any one of power supplies VCC, VSS and VCE _ HTx is abnormal, or the input level of a pin 2 of the chip A9 is overturned when the driving signal Drive _ HTx and the controlled IGBT state feedback MES _ VCEx are abnormal, so that the pin 3 of the chip A9 sends out a static fault signal.

The beneficial effect of adopting above-mentioned technical scheme is: by adopting the design of a static fault signal mode, the controller can more flexibly master the real-time state and the fault of the controlled IGBT, so that a fault point can be more accurately judged, and the troubleshooting cost during the fault is greatly reduced.

In other embodiments of the present invention, as shown in fig. 8, the hardware self-test and protection circuit includes a second transistor and a third transistor, and the second transistor and the third transistor are configured to convert the static fault signal and output the static fault signal to the base of the driving signal optical coupling isolation circuit. For example: after one path of the static fault signal (Prot _ out _ HTx) is converted by the second triode T75 and the third triode T76, the Prot _ HTx signal is transmitted to the bases of T13 and T23 in fig. 4, so that the driver realizes that hardware automatically blocks the rear-stage IGBT driving signal, thereby effectively protecting the controlled IGBT module.

In other embodiments of the present invention, as shown in fig. 9, the fault signal opto-isolator circuit includes a fourth transistor configured to configure the fault signal opto-isolator circuit in an open collector configuration. For example: the static fault signal directly passes through the fault signal optical coupling isolation circuit, and the static fault signal is transmitted back to the auxiliary system controller through the X1 connector, so that the auxiliary system controller is prompted to take corresponding measures. The circuit is designed into an open collector structure through a fourth triode T4, and the auxiliary inverter module driving board can be butted with different level controllers only by adjusting a direct current power supply VCC supplied by a collector of the fourth triode T4, so that the compatibility of the driver is enhanced.

The beneficial effect of adopting above-mentioned technical scheme is: in the prior art, the IGBT state feedback is usually directly connected to an IGBT drive Vge after voltage reduction by a voltage regulator tube, and the technical scheme can realize the design of isolated conversion of high-voltage and low-voltage drive signals, so that the IGBT state feedback has obvious progress compared with the prior art; in addition, regarding the circuit of IGBT state feedback, the prior art usually adopts the real-time dynamic feedback mode, the system is easy to be interfered, meanwhile, because the hardware does not judge whether the IGBT is in failure, but simply returns the state information to the controller, thereby increasing the design burden of the controller.

Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, units provided by the present invention as pure computer readable program code, the system and its various devices, modules, units provided by the present invention can be fully implemented by logically programming method steps in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units included in the system for realizing various functions can also be regarded as structures in the hardware component; means, modules, units for performing the various functions may also be regarded as structures within both software modules and hardware components for performing the method.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.