阅读说明：本技术 一种用于轨道车辆的牵引逆变模块驱动板 (Traction inversion 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牵引逆变模块驱动板,包括：AC/DC电源、驱动信号光纤隔离电路、驱动信号放大电路、驱动IGBT接口及硬件保护电路；其中AC/DC电源包括隔离变压器；AC/DC电源分别为驱动信号光纤隔离电路、驱动信号放大电路及硬件保护电路提供设定的电源；驱动信号光纤隔离电路与驱动信号放大电路通讯连接；驱动信号放大电路分别与驱动IGBT接口及硬件保护电路通讯连接。本发明通过在驱动板卡中增加保护电路并采用无状态回馈模式,既简化了驱动板卡的设计,又增强了系统工作的稳定性和可靠性。(The invention discloses a traction inversion module driving plate for a railway vehicle, which comprises: the device comprises an AC/DC power supply, a drive signal optical fiber isolation circuit, a drive signal amplification circuit, a drive IGBT interface and a hardware protection circuit; wherein the AC/DC power supply includes an isolation transformer; the AC/DC power supply provides set power supply for the drive signal optical fiber isolation circuit, the drive signal amplification circuit and the hardware protection circuit respectively; the drive signal optical fiber 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 interface and the hardware protection circuit. According to the invention, the protection circuit is added in the drive board card and a stateless feedback mode is adopted, so that the design of the drive board card is simplified, and the stability and reliability of system operation are enhanced.)

1. A traction inverter module drive plate for a rail vehicle, comprising: the device comprises an AC/DC power supply, a drive signal optical fiber isolation circuit, a drive signal amplification circuit, a drive IGBT interface and a hardware protection circuit;

the AC/DC power supply comprises an isolation transformer;

a power supply board card of the railway vehicle is connected with the primary side receiving side of the isolation transformer and provides a set power supply for the AC/DC power supply;

the AC/DC power supply provides set power supply for the drive signal optical fiber isolation circuit, the drive signal amplification circuit and the hardware protection circuit respectively;

the traction system controller of the rail vehicle is in communication connection with the drive signal optical fiber isolation circuit;

the drive signal optical fiber 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 interface and the hardware protection circuit;

and a controlled IGBT module is externally connected to the driving IGBT interface.

2. The traction inverter module drive board for a railway vehicle according to claim 1, wherein the AC/DC power supply further comprises a bridge full wave rectifier having an input connected to the secondary side of the isolation transformer; the primary side of the isolation transformer is a set alternating current power supply, and the output end of the bridge type full-wave rectifier can provide a set first positive voltage and a set first negative voltage.

3. The traction inverter module driving board for the railway vehicle according to claim 2, wherein the AC/DC power supply further comprises a secondary power supply, the secondary power supply comprises a three-terminal regulator and a regulated power supply chip, and the three-terminal regulator and the bridge full-wave rectifier are constructed to form a secondary stabilized power supply part for outputting a set second positive voltage; the voltage stabilizing power supply chip and the bridge type full-wave rectifier are built to form a two-stage floating power supply part for outputting a third positive voltage, and the difference value between the voltage of the third positive voltage and the first positive voltage is a set voltage difference.

4. The traction inverter module driver board for a railway vehicle according to claim 3, wherein the AC/DC power supply further comprises a power self-test circuit, the power self-test circuit comprises a first clamping diode and a first triode, an input end of the first clamping diode is provided with the first positive voltage, and an output end of the first clamping diode is clamped with the first triode to output a set reference voltage or control to block an IGBT driving signal.

5. The traction inverter module driving board for the rail vehicle according to claim 4, wherein the driving signal optical fiber isolation circuit comprises a photoelectric receiver, an exclusive-or gate and a plug connector, the photoelectric receiver is used for receiving the PWM pulse signal of the traction system controller and performing photoelectric conversion, the exclusive-or gate is respectively in communication connection with the photoelectric receiver and the plug connector and is used for receiving the signal converted by the photoelectric receiver and selecting an effective level to output; the plug connector is electrically connected with the first positive voltage and the third positive voltage and used for controlling the selection of the exclusive-OR gate on the signal converted by the photoelectric receiver.

6. The traction inverter module driving board for a railway vehicle according to claim 5, wherein the hardware protection circuit comprises a first operational amplifier, a second transistor and a third transistor, the first positive voltage, the first negative voltage and the second positive voltage are configured as a self-test circuit through the first operational amplifier, and the output level of the clamping driving signal is controlled through the second transistor; the third triode is used for controlling the driving voltage output by the driving signal optical fiber isolation circuit.

7. The traction inverter module driver board for a railway vehicle according to claim 6, wherein the hardware protection circuit further comprises a threshold voltage, the threshold voltage is located at an input end of the third transistor, the driving signal optical fiber isolation circuit comprises a fourth transistor, and an output end of the exclusive or gate clamps the threshold voltage through the fourth transistor to control on and off of the third transistor.

8. The traction inverter module driving board for railway vehicles according to claim 7, wherein the driving signal optical fiber isolation circuit further comprises a second operational amplifier, and the two pieces of the second operational amplifier, the threshold voltage and a fourth triode form a hysteresis comparator, and the hysteresis comparator is used for enhancing the anti-jamming capability of the driving signal optical fiber isolation circuit.

9. The traction inverter module drive board for a railway vehicle according to claim 8, wherein the drive signal fiber isolation circuit further comprises a fifth triode and an IGBT VCE detection circuit, and the IGBT VCE detection circuit is in communication connection with the fifth triode and is used for performing overcurrent protection on the IGBT.

10. The traction inverter module driver board for a railway vehicle according to claim 9, wherein the driving signal amplifying circuit includes a sixth transistor, a seventh transistor, a second clamping diode and an eighth transistor, the sixth transistor is connected to the reference power source, the seventh transistor is controlled by a driving signal, and the second clamping diode and the eighth transistor form a darlington transistor for controlling signals between the plurality of plug connectors to be converted with the driving signal.

Technical Field

The invention relates to the technical field of rail vehicle traction, in particular to a traction inverter module driving plate for a rail vehicle.

Background

The traction inversion module is one of core components of a traction inverter, and has the main function of inverting 1500V direct current of a touch net into alternating current with adjustable voltage and frequency (VVVF) through Pulse Width Modulation (PWM) when a train is pulled so as to supply power to a three-phase alternating current motor. The driving board is a core control component of the traction inversion module, is mainly used for driving the IGBT to be switched on and off, has the functions of monitoring power supply voltage, protecting faults in real time and the like, and directly influences the function of the whole train if the working state of the driving board is normal or not.

The IGBT drive control board card is arranged between the control board and the IGBT module and comprises a drive power supply circuit, a PWM control circuit, a drive circuit and a hardware protection circuit; a PWM square wave control signal sent by the traction controller is connected with a signal input end (an optical fiber receiver) of a PWM control circuit through an optical fiber transmission line, and a square wave signal output end of the PWM control circuit is connected with a first input end of a driving circuit and an output end of a fault detection circuit; the voltage input end of the driving power circuit is connected with the power output end on the power supply board, and the voltage signal output end of the driving power circuit respectively supplies power for the driving signal isolation unit, the driving signal amplification circuit and the hardware protection circuit; the input end of the hardware protection circuit receives power supply voltage and IGBT feedback information respectively, the detection result is fed back to the driving signal amplification unit, and when the power supply or the IGBT is abnormal, the driving signal is blocked, so that the controlled IGBT module is protected.

Along with the increase of the operation age of subway trains and the high-strength use frequency, the aging degree of electronic components is increased, so that the faults of the trains occur frequently, and the safe and efficient operation of rail transit is severely restricted. The traction inverter module driving board is the most core of a subway train traction system and is one of components with higher failure rate, and an original driving board mainly depends on foreign import, and is high in price and long in supply period. Therefore, a certain technical force needs to be input to explore and solve the problem, the problem of spare parts is solved, the maintenance cost is reduced, technical innovation is further performed, the working performance of the traction module is improved, and the safety and reliability of train operation are improved.

Therefore, there is a need in the art for a traction inverter module driving board with simplified configuration, low cost, and stable and reliable operation.

Disclosure of Invention

In order to solve the technical problems, the invention provides a traction inverter module driving plate which is simplified in configuration, excellent in performance, economical in cost and stable and reliable in operation.

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

the invention discloses a traction inversion module driving plate for a railway vehicle, which comprises: the device comprises an AC/DC power supply, a drive signal optical fiber isolation circuit, a drive signal amplification circuit, a drive IGBT interface and a hardware protection circuit; the AC/DC power supply comprises an isolation transformer; a power supply board card of the railway vehicle is connected with the primary side receiving side of the isolation transformer and provides a set power supply for the AC/DC power supply; the AC/DC power supply provides set power supply for the drive signal optical fiber isolation circuit, the drive signal amplification circuit and the hardware protection circuit respectively; the traction system controller of the rail vehicle is in communication connection with the drive signal optical fiber isolation circuit; the drive signal optical fiber 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 interface and the hardware protection circuit; and a controlled IGBT module is externally connected to the driving IGBT interface.

The beneficial effect of adopting above-mentioned technical scheme is: the problem that in the prior art, the state feedback circuit is designed in the driving board card of the traction inverter module, the operation stability of the driving board card is poor due to the fact that the state feedback circuit excessively depends on state analysis of a control center and feedback data of the state feedback circuit is fully considered, and by adding the protection circuit in the driving board card and adopting a stateless feedback mode, the design of the driving board card is simplified, and the stability and the reliability of system work are improved. In addition, the driving board card adopts a single card design, and corresponds to the number of the traction inverter modules one by one, so that after-sale maintenance is facilitated, and the maintenance cost is effectively reduced.

As a further improvement of the technical scheme of the invention, the AC/DC power supply further comprises a bridge full-wave rectifier, wherein an input end of the bridge full-wave rectifier is connected with a secondary side of the isolation transformer; the primary side of the isolation transformer is a set alternating current power supply, and the output end of the bridge type full-wave rectifier can provide a set first positive voltage and a set first negative voltage.

As a further improvement of the technical scheme of the invention, the AC/DC power supply further comprises a secondary power supply, wherein the secondary power supply comprises a three-terminal voltage regulator and a voltage-stabilized power supply chip, and the three-terminal voltage-stabilized power supply and the bridge full-wave rectifier are built to form a secondary stabilized power supply part for outputting a set second positive voltage; the voltage stabilizing power supply chip and the bridge type full-wave rectifier are built to form a two-stage floating power supply part for outputting a third positive voltage, the difference value between the voltage of the third positive voltage and the first positive voltage is a set voltage difference, the voltage of the third positive voltage fluctuates along with the fluctuation of the first positive voltage, and the voltage difference is kept constant all the time.

The beneficial effect of adopting above-mentioned technical scheme is: the design of the floating voltage is adopted, namely the design of the floating voltage is adopted, the anti-jamming capability and the stability of the board card are enhanced, a standard three-terminal voltage regulator tube is usually adopted in the prior art to realize a voltage stabilizing circuit, and the design of the floating voltage can effectively avoid the risk of burning the three-terminal voltage regulator tube when the first positive voltage exceeds the working voltage of the three-terminal voltage regulator tube.

As a further improvement of the technical solution of the present invention, the AC/DC power supply further includes a power supply self-checking circuit, the power supply self-checking circuit includes a first clamping diode and a first triode, an input end of the first clamping diode is the first positive voltage, and an output end of the first clamping diode is in clamping connection with the first triode to output a set reference voltage or control to block an IGBT driving signal.

The beneficial effect of adopting above-mentioned technical scheme is: the setting of power self-checking circuit can stably output reference power on the one hand, and when first positive voltage was unusual, the drive signal of blockade IGBT can be controlled to the voltage of reference power output to effectively protected IGBT's safety, compared with prior art, increased the one deck protection barrier for IGBT in other words.

As a further improvement of the technical solution of the present invention, the drive signal optical fiber isolation circuit includes a photoelectric receiver, an exclusive or gate and a plug connector, the photoelectric receiver is configured to receive a PWM pulse signal of a traction system controller and perform photoelectric conversion, and the exclusive or gate is respectively in communication connection with the photoelectric receiver and the plug connector, and is configured to receive a signal converted by the photoelectric receiver and select an effective level for output; the plug connector is electrically connected with the first positive voltage and the third positive voltage and used for controlling the selection of the exclusive-OR gate on the signal converted by the photoelectric receiver.

The beneficial effect of adopting above-mentioned technical scheme is: in the prior art, hardware is generally adopted to autonomously select the effectiveness of a given signal high-low level of an upper computer, and only the high level is defaulted to be effective; compared with the prior art, the effective level of the converted signal of the photoelectric receiver is selected autonomously through the matching arrangement of the photoelectric receiver, the exclusive-OR gate and the plug connector, and the compatibility among traction drive modules of various brands is better.

As a further improvement of the technical solution of the present invention, the hardware protection circuit includes a first operational amplifier, a second triode, and a third triode, wherein the first positive voltage, the first negative voltage, and the second positive voltage are configured as a self-checking circuit through the first operational amplifier, and the output level of the clamping driving signal is controlled through the second triode; the third triode is used for controlling the driving voltage output by the driving signal optical fiber isolation circuit.

As a further improvement of the technical solution of the present invention, the hardware protection circuit further includes a threshold voltage, the threshold voltage is located at an input end of the third triode, the driving signal optical fiber isolation circuit includes a fourth triode, and an output end of the xor gate clamps the threshold voltage through the fourth triode to control the on/off of the third triode.

As a further improvement of the technical solution of the present invention, the drive signal optical fiber isolation circuit further includes a second operational amplifier, two pieces of the second operational amplifier, the threshold voltage and a fourth triode form a hysteresis comparator, and the hysteresis comparator is used for enhancing the anti-interference capability of the drive signal optical fiber isolation circuit.

As a further improvement of the technical scheme of the present invention, the drive signal optical fiber isolation circuit further includes a fifth triode and an IGBT VCE detection circuit, and the IGBT VCE detection circuit is in communication connection with the fifth triode and is used for performing overcurrent protection on the IGBT.

As a further improvement of the technical solution of the present invention, the driving signal amplifying circuit includes a sixth triode, a seventh triode, a second clamping diode, and an eighth triode, the sixth triode is connected to the reference power supply, the seventh triode is controlled by a driving signal, and the second clamping diode and the eighth triode form a darlington transistor for controlling signals among the plurality of plug connectors to be converted with the driving signal.

The beneficial effect of adopting above-mentioned technical scheme is: and in the push-pull design, the two second clamping diodes and the four eighth triodes form two pairs of Darlington tubes, so that the signal amplification factor of the Darlington tubes can be greatly increased, and the controlled IGBT module can be better protected.

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 topology diagram of a driving board card of the present invention;

FIG. 2 is a schematic diagram of an AC/DC power supply circuit of the present invention;

FIG. 3 is a schematic diagram of a secondary power circuit of the AC/DC power supply of the present invention;

FIG. 4 is a schematic diagram of a power self-test circuit according to the present invention;

FIG. 5 is a schematic diagram of a drive signal fiber isolation circuit according to the present invention;

FIG. 6 is a schematic diagram of a hardware protection circuit according to the present invention;

FIG. 7 is a schematic view of a drive signal amplification and drive IGBT interface of the present invention;

fig. 8 is a schematic diagram of the IGBT VCE detection circuit of 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, a traction inverter module drive plate for a rail vehicle is disclosed, comprising: the device comprises an AC/DC power supply, a drive signal optical fiber isolation circuit, a drive signal amplification circuit, a drive IGBT interface and a hardware protection circuit; an AC/DC power supply including an isolation transformer; a power supply board card of the railway vehicle is connected with a primary side receiving side of the isolation transformer and provides a set power supply for an AC/DC power supply; the AC/DC power supply provides set power supply for the drive signal optical fiber isolation circuit, the drive signal amplification circuit and the hardware protection circuit respectively; the traction system controller of the rail vehicle is in communication connection with the drive signal optical fiber isolation circuit; the drive signal optical fiber 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 interface and the hardware protection circuit; and a controlled IGBT module is externally connected to the driving IGBT interface.

The beneficial effect of adopting above-mentioned technical scheme is: the problem that in the prior art, the state feedback circuit is designed in the driving board card of the traction inverter module, the operation stability of the driving board card is poor due to the fact that the state feedback circuit excessively depends on state analysis of a control center and feedback data of the state feedback circuit is fully considered, and by adding the protection circuit in the driving board card and adopting a stateless feedback mode, the design of the driving board card is simplified, and the stability and the reliability of system work are improved. In addition, the driving board card adopts a single card design, and corresponds to the number of the traction inverter modules one by one, so that after-sale maintenance is facilitated, and the maintenance cost is effectively reduced.

In other embodiments of the present invention, as shown in fig. 2, the AC/DC power supply further includes a full-wave bridge rectifier built from V3, V4, V6 and V7, wherein an input terminal of the full-wave bridge rectifier is connected to a secondary side of the isolation transformer T1; the primary side of the isolation transformer T1 is a set ac power supply of ± 24V50KHz, and the output of the bridge full-wave rectifier is capable of providing a set first positive voltage VCC of +26V and a set first negative voltage VSS of-15V.

In other embodiments of the present invention, as shown in fig. 3, the AC/DC power supply further includes a secondary power supply, the secondary power supply includes a three-terminal regulator U1 and a regulated power supply chip U2, the three-terminal regulator U1 and the full-wave bridge rectifier are built to form a secondary stabilized power supply portion for outputting a second positive voltage VEE, for example, VEE + 12V; the regulated power supply chip U2 and the bridge type full wave rectifier are built to form a two-stage floating power supply part for outputting a third positive voltage VC, and the difference value between the third positive voltage VC and the first positive voltage VCC is a set voltage difference. For example: when the first positive voltage VCC is +26V with respect to the GND voltage, the third positive voltage VC at the output end of the first positive voltage VCC after passing through the regulated power supply chip U2 is +21V, so the voltage difference between the third positive voltage VC and the first positive voltage VCC is VCC-VC, which is 5V, and the voltage of the third positive voltage VC fluctuates along with the fluctuation of the first positive voltage VCC, so the voltage difference 5V is always kept stable.

The beneficial effect of adopting above-mentioned technical scheme is: the design of the floating voltage is adopted, namely the design of the floating voltage is adopted, the anti-jamming capability and the stability of the board card are enhanced, a standard three-terminal voltage regulator tube is usually adopted in the prior art to realize a voltage stabilizing circuit, and the design of the floating voltage can effectively avoid the risk of burning the three-terminal voltage regulator tube when the first positive voltage exceeds the working voltage of the three-terminal voltage regulator tube.

In other embodiments of the present invention, the AC/DC power supply further includes a power self-checking circuit, the power self-checking circuit includes a first clamping diode and a first transistor, an input terminal of the first clamping diode is a first positive voltage, and an output terminal of the first clamping diode is clamped to the first transistor for outputting a set reference voltage or controlling to block the IGBT driving signal. For example: as shown in fig. 4 and 7, the first positive voltage VCC power supply is clamped by the first clamping diodes V17 and U3 and then controls the first transistors V20 and V19 to be turned on, and finally stably outputs the reference voltage REF2 equal to 24V, and if the first positive voltage VCC is abnormal, the output voltage of the reference voltage REF2 controls to block the IGBT driving signal for protection.

The beneficial effect of adopting above-mentioned technical scheme is: the setting of power self-checking circuit can stably output reference power on the one hand, and when first positive voltage was unusual, the drive signal of blockade IGBT can be controlled to the voltage of reference power output to effectively protected IGBT's safety, compared with prior art, increased the one deck protection barrier for IGBT in other words.

In other embodiments of the present invention, the driving signal optical fiber isolation circuit includes a photo receiver U4, an exclusive or gate U6, and a plug X1, the photo receiver U4 is configured to receive a PWM pulse signal of the traction system controller and perform a photo-electric conversion, the exclusive or gate U6 is respectively connected to the photo receiver U4 and the plug X1 in a communication manner, and is configured to receive a signal converted by the photo receiver U4 and select an effective level for output; the plug connector X1 is electrically connected with the output end of the first positive voltage VCC and the output end of the third positive voltage VC, and is used for controlling the selection of the signal converted by the photoelectric receiver U4 by the XOR gate U6. For example: as shown in fig. 5, a PWM pulse signal sent by the traction controller is transmitted to the photoelectric receiver U4 through an optical fiber, is subjected to photoelectric conversion through U4, is transmitted to a subsequent stage through U6, and is subjected to line short-circuit through X1, so that the U6 can be controlled to select the level validity of the signal after U4 conversion. That is, when the X1 inserts a line to short its 1 and 4 pins, U4 is active high; otherwise, the low level is active.

The beneficial effect of adopting above-mentioned technical scheme is: in the prior art, hardware is generally adopted to autonomously select the effectiveness of a given signal high-low level of an upper computer, and only the high level is defaulted to be effective; compared with the prior art, the effective level of the converted signal of the photoelectric receiver is selected autonomously through the matching arrangement of the photoelectric receiver, the exclusive-OR gate and the plug connector, and the compatibility among traction drive modules of various brands is better.

In other embodiments of the present invention, as shown in fig. 6, the hardware protection circuit includes a first operational amplifier U5, a second transistor V30, and a third transistor V31, wherein the first positive voltage VCC, the first negative voltage VSS, and the second positive voltage VEE are configured as a self-test circuit through the first operational amplifier U5, and the output level of the clamping driving signal is controlled through the second transistor V30; the third transistor V31 is used to control the driving voltage Drive output by the driving signal fiber isolation circuit. For example: when a fault occurs, the third transistor V31 is off-locked, and the "Drive" is always at the-18V output, regardless of the externally input signal.

In other embodiments of the present invention, as shown in fig. 5 and 6, the hardware protection circuit further includes a threshold voltage Por, the threshold voltage Por is located at an input end of the third transistor V31, the driving signal optical fiber isolation circuit includes a fourth transistor V27, and an output end of the xor gate U6 clamps the threshold voltage Por through the fourth transistor V27 to control the on/off of the third transistor V31. For example: the output end of the exclusive-or gate U6 clamps the threshold voltage Por in the graph 6 through a fourth triode V27, and controls the opening or closing of a third triode V31, so that a PWM signal sent by a traction system controller is converted into a 'Drive' signal, and the signal level is converted from 0V-5V to-18V- + 8.9V.

In other embodiments of the present invention, as shown in FIG. 5, the driving signal fiber isolation circuit further comprises a second operational amplifier U7, two pieces of the second operational amplifier U7 and a threshold voltage P_or and the fourth triode V27 form a hysteresis comparator, and the hysteresis comparator is used for enhancing the anti-interference capability of the drive signal optical fiber isolation circuit.

In other embodiments of the present invention, as shown in fig. 5 and 8, the driving signal optical fiber isolation circuit further includes a fifth transistor V39 and an IGBT VCE detection circuit, and the IGBT VCE detection circuit is communicatively connected to the fifth transistor V39 for performing overcurrent protection on the IGBT. For example: the output end of the exclusive-or gate U6 realizes the IGBT overcurrent protection locking function through the fifth triode V39, the VCE detection current is shown in figure 8, when the IGBT overcurrent is detected through the C1_ X of an IGBT VCE signal, the fifth triode V39 is opened to lock the IGBT driving signal, and the IGBT is protected.

In other embodiments of the present invention, as shown in fig. 7, the driving signal amplifying circuit includes a sixth transistor, a seventh transistor, a second clamping diode and an eighth transistor, the sixth transistor is connected to the reference power source, the seventh transistor is controlled by the driving signal, and the second clamping diode and the eighth transistor form a darlington transistor for controlling signals among the plurality of plug connectors to be converted along with the driving signal. For example: when a driving board card power supply of the traction inverter module is normal, a reference voltage REF2 controls a sixth triode V8 to be in a conducting state, at the moment, a driving signal Drive signal controls the opening and the closing of a seventh triode V9, a Darlington tube is formed by second clamping diodes V11 and V10 for clamping control, eighth triodes V12 and V14, V13 and V15 for push-pull design, so that signals between connectors G _ X1 and E _ X1 are controlled to follow the driving signal Drive for conversion, and the controlled IGBT is driven to be opened and closed; when the power supply of a driving board card of the traction inverter module is abnormal, the sixth triode V8 is in a cut-off state, and at the moment, the voltage output of minus 10V is always kept between the connectors G _ X1 and E _ X1, so that the IGBT is controlled to be always in a cut-off state, and the controlled IGBT module is protected.

The beneficial effect of adopting above-mentioned technical scheme is: in the push-pull design, two second clamping diodes and four eighth triodes form two pairs of Darlington tubes, and the signal amplification times are respectively as follows: the beta V12 beta V14 and the beta V13 beta V15 can greatly increase the signal amplification factor of the Darlington tube, and can better protect the controlled IGBT module.

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.