CN210136600U - Real device of instructing of electric automobile motor system - Google Patents

Abstract

The utility model provides a real device of instructing of electric automobile motor system, include: the practical training platform plate is fixedly provided with a motor system simulation circuit board and a first interface module, and further comprises a fault setting device for setting faults for the motor system simulation circuit board, wherein the fault setting device comprises a second interface module, the first interface module and the second interface module are connected through a special wire harness, and the practical training platform plate further comprises an upper computer in wireless communication with the fault setting device. The utility model discloses a to motor, the planarization show of motor control unit, the information transfer mode of show motor to through setting up trouble setting device and host computer, make the audio-visual understanding of student and be familiar with driving motor control system's fault type and diagnostic method fast.

Description

An electric vehicle motor system training device

technical field

The utility model relates to the technical field of educational devices, in particular to an electric vehicle motor system training device.

Background technique

Battery, motor and electronic control are the three core components of new energy vehicles. The motor drive control system is the main execution structure of new energy vehicles. Its driving characteristics determine the main performance indicators of vehicle driving. It is an important part of electric vehicles. part. The motor drive system is mainly composed of a motor, a power converter, a controller, various detection sensors, and a power supply.

Therefore, the theoretical and practical teaching of the electric vehicle motor system is very important. The utility model proposes an electric vehicle motor system training device. By setting the training platform, the motor system simulation circuit board is installed on the training platform. , realizing the flat display of the motor and the motor control unit, showing the information transmission method of the motor, and by setting the fault setting device and the upper computer, so that the students can intuitively understand and quickly become familiar with the fault types and diagnosis methods of the drive motor control system.

Utility model content

In view of the above problems, the purpose of this utility model is to propose an electric vehicle motor system training device, so that students can intuitively understand and quickly become familiar with the fault types and diagnosis methods of the drive motor control system.

The technical solution adopted by the utility model to solve the above technical problems is: an electric vehicle motor system training device, which is characterized by comprising: a training platform, on which a motor system simulation circuit board is fixedly installed and a first interface module, further comprising a fault setting device for setting a fault for the motor system simulation circuit board, the fault setting device comprising a second interface module, the first interface module and the second interface module are connected by a dedicated wire harness, Also includes a host computer wirelessly communicating with the fault setting device, wherein,

The motor system analog circuit board includes: a main control unit, a drive motor assembly, a Hall signal shaping circuit, a temperature acquisition module, a current acquisition module, an inverter unit, a high-voltage interface, a low-voltage interface, a CAN communication module, a power supply control module, A battery manager module, a total negative control relay, a precharge relay, a total positive control relay, a vehicle controller, and a fault indicator light, the drive motor assembly includes a DC brushless motor, a motor temperature sensor, and a Hall-type rotor position sensor , the positive terminal of the high-voltage interface is respectively connected to the input terminals of the precharge relay and the total positive control relay, the output terminals of the precharge relay and the total positive control relay are both connected to the positive input terminal of the inverter unit, the The negative pole of the high-voltage interface is connected to the input terminal of the total negative control relay, the output terminal of the total negative control relay is connected to the negative input terminal of the inverter unit, and the control terminal of the inverter unit is connected to the main control unit, so the The control terminals of the total positive control relay, the precharge relay and the total negative control relay are respectively connected to the control output terminal of the battery manager module, and the communication terminal of the low voltage interface is respectively connected to the CAN communication module and the battery management module through the CAN bus. The output terminal of the vehicle controller is connected to the fault indicator light, the CAN communication module is connected to the main control unit, and the power terminal of the low-voltage interface is connected to the power supply control module. The power control module is connected to the main control unit to provide voltage for the main control unit, the inverter unit inverts the direct current to alternating current, and then connects to the brushless DC motor, and the motor temperature sensor is used to detect the DC voltage. The temperature of the brush motor is sent to the temperature acquisition module. The temperature acquisition module converts the analog signal into a digital signal and sends it to the main control unit. The Hall-type rotor position sensor is used to detect the rotor of the brushless DC motor. position, the Hall-type rotor position sensor is connected to the Hall signal shaping circuit, and the Hall signal shaping circuit sends the shaped Hall signal to the main control unit;

The fault setting device at least includes: a fault controller, a motor temperature sensor signal line fault module, a positive relay power supply line fault module, a negative relay power supply line fault module, and a precharge relay power line fault module, the fault controller and the The host computer wirelessly communicates, and the output end of the fault controller is respectively connected to the control end of the motor temperature sensor signal line fault module, the positive relay power line fault module, the negative relay power line fault module, and the precharge relay power line fault module. The motor temperature sensor signal line fault module is connected in series between the motor temperature sensor and the temperature acquisition module, the positive relay power line fault module is connected in series between the high-voltage interface and the total positive control relay, and the negative relay power line fault module is connected in series It is connected between the high-voltage interface and the total negative control relay, and the pre-charging relay power line fault module is connected in series between the high-voltage interface and the pre-charging relay.

Further, the inverter unit adopts an IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) module, and further includes an IGBT temperature sensor, and the IGBT temperature sensor is connected to the temperature acquisition module.

Further, the motor system simulation circuit board also includes a bootstrap booster circuit, the bootstrap booster circuit is composed of a diode and a capacitor connected in series, the anode of the diode is connected to the 12V voltage, the cathode of the diode is connected to the anode of the capacitor, and the The negative pole is connected to the power terminal of the IGBT module to increase the voltage of the IGBT module.

Further, an IGBT drive current collection module and an IGBT power supply voltage collection module are connected in series on the positive line between the total positive control relay and the pre-charge relay pre-IGBT module, and the IGBT drive current collection module and the IGBT power supply voltage collection module are also connected. the main control unit.

Further, a current measurement module is connected in series with the line connecting the IGBT module and the DC brushless motor, and the current measurement module is connected to the main control unit.

Further, the fault setting module also includes an IGBT temperature sensor signal line fault module, an IGBT power supply voltage acquisition fault module and an IGBT drive current acquisition fault module, an IGBT temperature sensor signal line fault module, an IGBT power supply voltage acquisition fault module and an IGBT drive current acquisition fault module. The control ends of the fault modules are respectively connected to the fault controllers, the IGBT temperature sensor signal line fault module is connected in series between the IGBT temperature sensor and the temperature acquisition module, and the IGBT power supply voltage acquisition fault module is connected in series between the IGBT power supply voltage acquisition module and the temperature acquisition module. Between the IGBT modules, the IGBT drive current collection fault module is connected in series between the IGBT drive current collection module and the IGBT module.

Further, each of the above-mentioned fault modules is composed of a circuit breaker relay and a virtual connection relay connected in parallel with each other. The control terminals of the circuit breaker relay and the virtual connection relay are respectively connected to the fault controller. The normally open contact of the virtual connection relay is connected in series with the resistance as the output terminal.

Further, the fault indicator includes a motor temperature sensor signal line fault light, a positive relay power line fault light, a negative relay power line fault light, a pre-charge relay power line fault light, an IGBT temperature sensor signal line fault light, and an IGBT power supply voltage acquisition light. Fault light and IGBT drive current acquisition fault light.

Further, the main control unit adopts STM32F105VC single-chip microcomputer chip.

The advantages of the utility model are: the utility model proposes an electric vehicle motor system training device. By setting the training platform, the motor system simulation circuit board is installed on the training platform, so as to realize the control of the motor and the motor control unit. It shows the information transmission method of the motor, and through the setting of the fault setting device and the upper computer, the students can intuitively understand and quickly become familiar with the fault types and diagnosis methods of the drive motor control system.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the following descriptions The accompanying drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the structural block diagram of a kind of electric vehicle motor system training device of the present invention;

Fig. 2 is the structure diagram of the motor system simulation circuit board of the utility model;

FIG. 3 is a circuit diagram of one of the faulty modules of the present invention.

Among them: 1. upper computer; 2. training platform; 3. motor system simulation circuit board; 4. first interface module; 5. fault setting device; 6. second interface module; 51. motor temperature sensor signal line fault Module; 52. Positive relay power supply line fault module; 53. Negative relay power supply line fault module; 54. Precharge relay power supply line fault module; 55. IGBT temperature sensor signal line fault module; 56. IGBT power supply voltage acquisition fault module; 57 , IGBT drive current acquisition fault module; 301, main control unit; 302, drive motor assembly; 3021, DC brushless motor; 3022, motor temperature sensor; 3023, Hall rotor position sensor; 303, Hall signal shaping circuit 304, temperature acquisition module; 305, current measurement module; 306, IGBT temperature sensor; 307, IGBT module; 308, vehicle controller; 309, high voltage interface; 310, low voltage interface; 311, power control module; 312, CAN Communication module; 313, battery manager module; 314, total negative control relay; 315, precharge relay; 316, total positive control relay; 317, IGBT drive current acquisition module; 318, IGBT power supply voltage acquisition module; 319, bootstrap boost circuit.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation on the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

As shown in FIG. 1 and FIG. 2, an electric vehicle motor system training device is characterized in that it includes: a training platform 2, on which a motor system simulation circuit board 3 and a first training platform are fixedly installed. An interface module 4, further comprising a fault setting device 5 for setting faults for the motor system analog circuit board 3, the fault setting device 5 includes a second interface module 6, the first interface module 4 and the second interface module 6 Connected through a dedicated wire harness, it also includes the upper computer 1 wirelessly communicating with the fault setting device 5, wherein,

The motor system simulation circuit board 3 includes: a main control unit 301, a drive motor assembly 302, a Hall signal shaping circuit 303, a temperature acquisition module 304, a current acquisition module, an inverter unit, a high voltage interface 309, a low voltage interface 310, CAN Communication module 312, power control module 311, battery manager module 313, total negative control relay 314, precharge relay 315, total positive control relay 316, vehicle controller 308, fault indicator light, the drive motor assembly 302 includes DC brushless motor 3021, motor temperature sensor 3022, Hall rotor position sensor 3023, the positive terminal of the high-voltage interface 309 is connected to the input terminals of the pre-charging relay 315 and the total positive control relay 316, respectively. The pre-charging relay 315 and the output terminals of the total positive control relay 316 are both connected to the positive input terminal of the inverter unit, the negative terminal of the high voltage interface 309 is connected to the input terminal of the total negative control relay 314, and the output terminal of the total negative control relay 314 Connected to the negative input terminal of the inverter unit, the control terminal of the inverter unit is connected to the main control unit 301, and the control terminals of the total positive control relay 316, the precharge relay 315 and the total negative control relay 314 are respectively connected to the The control output end of the battery manager module 313, the communication end of the low voltage interface 310 is respectively connected to the CAN communication module 312, the battery manager module 313 and the vehicle controller 308 through the CAN bus, and the vehicle controller 308 The output end of the low-voltage interface 310 is connected to the fault indicator light, the CAN communication module 312 is connected to the main control unit 301, the power supply end of the low-voltage interface 310 is connected to the power supply control module 311, and the power supply control module 311 is connected to the main control unit 311. The control unit 301 provides voltage for the main control unit 301, the inverter unit inverts the direct current to alternating current and connects to the brushless DC motor, the motor temperature sensor 3022 is used to detect the temperature of the brushless DC motor 3021, and send it to the temperature acquisition module 304, the temperature acquisition module 304 converts the analog signal into a digital signal and sends it to the main control unit 301, and the Hall-type rotor position sensor 3023 is used to detect the rotor of the brushless DC motor 3021 position, the Hall-type rotor position sensor 3023 is connected to the Hall signal shaping circuit 303, and the Hall signal shaping circuit 303 sends the shaped Hall signal to the main control unit 301;

The fault setting device 5 at least includes: a fault controller, a motor temperature sensor 3022, a signal line fault module 51, a positive relay power line fault module 52, a negative relay power line fault module 53, and a precharge relay 315 power line fault module 54. The fault controller communicates with the host computer 1 wirelessly, and the output terminals of the fault controller are respectively connected to the motor temperature sensor 3022, the signal line fault module 51, the positive relay power line fault module 52, the negative relay power line fault module 53, and the pre-relay power line fault module 53. The control terminal of the power supply line fault module 54 of the charging relay 315, the motor temperature sensor 3022 and the signal line fault module 51 are connected in series between the motor temperature sensor 3022 and the temperature acquisition module 304, and the positive relay power supply line fault module 52 is connected in series between the Between the high voltage interface 309 and the total positive control relay 316, the negative relay power line fault module 53 is connected in series between the high voltage interface 309 and the total negative control relay 314, and the precharge relay 315 The power line fault module 54 is connected in series between the high voltage interface 309 and the total negative control relay 314. between the high voltage interface 309 and the precharge relay 315 .

Further, the inverter unit adopts an IGBT module 307 , and further includes an IGBT temperature sensor 306 , and the IGBT temperature sensor 306 is connected to the temperature acquisition module 304 .

Further, the motor system simulation circuit board 3 also includes a bootstrap boost circuit 319, the bootstrap boost circuit 319 is composed of a diode and a capacitor in series, the anode of the diode is connected to the 12V voltage, and the cathode of the diode is connected to the anode of the capacitor, so The negative pole of the capacitor is connected to the power supply terminal of the IGBT module 307 to increase the voltage of the IGBT module 307 . By using electronic components such as bootstrap boost diodes and capacitors, the capacitor discharge voltage and the power supply voltage are superimposed, so that the voltage of the IGBT module 307 can be increased, even reaching several times the power supply voltage.

Further, an IGBT drive current collection module 317 and an IGBT power supply voltage collection module 318 are connected in series on the positive line between the total positive control relay 316 and the pre-charge relay 315 and the IGBT module 307. The IGBT drive current collection module 317 and the IGBT The power supply voltage acquisition module 318 is also connected to the main control unit 301 .

Further, a current measurement module 305 is connected in series with the line connecting the IGBT module 307 and the DC brushless motor 3021 , and the current measurement module 305 is connected to the main control unit 301 .

Further, the fault setting module also includes the IGBT temperature sensor 306 signal line fault module 55, the IGBT power supply voltage acquisition fault module 56 and the IGBT drive current acquisition fault module 57, the IGBT temperature sensor 306 signal line fault module 55, and the IGBT power supply voltage acquisition fault module. The control terminals of the module 56 and the IGBT drive current acquisition fault module 57 are respectively connected to the fault controller. The IGBT temperature sensor 306 signal line fault module 55 is connected in series between the IGBT temperature sensor 306 and the temperature acquisition module 304. The IGBT power supply voltage The acquisition fault module 56 is connected in series between the IGBT power supply voltage acquisition module 318 and the IGBT module 307 , and the IGBT driving current acquisition fault module 57 is connected in series between the IGBT driving current acquisition module 317 and the IGBT module 307 .

As shown in FIG. 3 , each of the above-mentioned fault modules is composed of an open circuit relay and a virtual connection relay in parallel with each other. The control terminals of the open circuit relay U3 and the virtual connection relay U4 are respectively connected to the fault controller, and the normally closed circuit of the open circuit relay U3 The contacts are output terminals, and the normally open contacts of the virtual connection relay U4 are connected in series with resistors as output terminals.

The process of setting the fault is as follows: 1. Open circuit fault, when the control terminal OC of the open circuit relay U3 is invalid (that is, no fault is set), the input signal is directly connected to the normally closed contact from the common terminal COM, and the normally closed contact NC is directly connected to the signal Output terminal; when the disconnection fault control signal is valid, the control input signal is switched from the normally closed contact to the normally open contact NO, the input signal is disconnected from the output signal, and the open circuit fault is successfully set in the circuit; 2. Virtual connection fault, virtual connection fault The normally open contact NC of the relay U4 is connected in series with a resistor with a suitable resistance value and then connected to the signal output terminal. When the virtual connection fault control signal is valid, the input signal goes directly from the common terminal COM to the normally open contact NO, that is, when the input signal is connected to the normal open contact NO. A resistor is connected in series between the output signals, and the virtual connection fault takes effect.

The specific connection method between the fault setting device 5 and the battery system simulation circuit board is that the motor system simulation circuit board 3 is composed of a circuit board and a painted schematic diagram. The circuit board includes actual components and connection interfaces. On the surface of the circuit board, each line fault detection connection interface of the motor system simulation circuit board 3 is connected to the first interface module 4 through the lead wire, and the output end of the relay of each fault module is connected to the second interface module 6 through the lead wire, so that , it is only necessary to connect the first interface module 4 and the second interface module 6 through the special wiring harness, and the fault setting device 5 can be connected in series with the relevant lines of the motor system analog circuit board 3, and the fault setting device 5 can be connected in series. The open circuit fault and virtual connection fault on the corresponding line can be set. The teacher can directly set the fault on the fault setting device 5 manually, or remotely set the fault through the upper computer 1. The simulation software of the motor system is drawn in the upper computer 1. circuit.

In addition, it should be noted that, according to the needs of training, the Hall-type rotor position sensor 3023 signal line fault module, CAN communication line fault module, and drive motor current measurement fault module can also be set.

Further, the fault indicators include motor temperature sensor 3022 signal line fault light, positive relay power line fault light, negative relay power line fault light, pre-charge relay 315 power line fault light, IGBT temperature sensor 306 signal line fault light, IGBT Power supply voltage acquisition fault light and IGBT drive current acquisition fault light.

Further, the main control unit 301 adopts an STM32F105VC single-chip microcomputer chip.

Through the training device of the present utility model, the following training items can be completed:

(1) Hall-type rotor position sensor signal circuit fault verification;

(2) The fault verification of the motor temperature sensor signal circuit;

(3) IGBT temperature sensor signal circuit fault verification;

(4) IGBT power supply voltage acquisition, monitoring circuit fault verification;

(5) IGBT drive current acquisition and monitoring circuit fault verification;

(6) Positive relay control of the drive motor and verification of power line faults;

(7) The main and negative relay control of the drive motor and the power circuit fault verification;

(8) Drive motor precharge relay control, power line fault verification;

(9) CAN communication line fault verification;

(10) Drive motor current measurement.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that : it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the various embodiments of the present utility model Scope of technical solutions.

Claims (9)

1. The utility model provides a real device of instructing of electric automobile motor system which characterized in that includes: a practical training bedplate, wherein a motor system simulation circuit board and a first interface module are fixedly arranged on the practical training bedplate, the practical training bedplate also comprises a fault setting device for setting faults for the motor system simulation circuit board, the fault setting device comprises a second interface module, the first interface module and the second interface module are connected through a special wire harness, the practical training bedplate also comprises an upper computer which is in wireless communication with the fault setting device, wherein,

the motor system simulation circuit board includes: the intelligent control system comprises a main control unit, a driving motor assembly, a Hall signal shaping circuit, a temperature acquisition module, a current acquisition module, an inversion unit, a high-voltage interface, a low-voltage interface, a CAN communication module, a power supply control module, a battery manager module, a total negative control relay, a pre-charging relay, a total positive control relay, a vehicle control unit and a fault indicator lamp, wherein the driving motor assembly comprises a direct-current brushless motor, a motor temperature sensor and a Hall rotor position sensor, the positive end of the high-voltage interface is respectively connected with the input ends of the pre-charging relay and the total positive control relay, the output ends of the pre-charging relay and the total positive control relay are respectively connected with the positive input end of the inversion unit, the negative electrode of the high-voltage interface is connected with the input end of the total negative control relay, and the output end of, the control end of the inversion unit is connected with the main control unit, the control ends of the total positive control relay, the pre-charging relay and the total negative control relay are respectively connected with the control output end of the battery manager module, the communication end of the low-voltage interface is respectively connected with the CAN communication module, the battery manager module and the whole vehicle controller through a CAN bus, the output end of the whole vehicle controller is connected with the fault indicator lamp, the CAN communication module is connected with the main control unit, the power end of the low-voltage interface is connected with the power supply control module, the power supply control module is connected with the main control unit to provide voltage for the main control unit, the inversion unit inverts direct current into alternating current and then is connected to the direct current brushless motor, the motor temperature sensor is used for detecting the temperature of the direct current brushless motor and sending the temperature to the temperature acquisition module, the temperature acquisition module converts an analog signal into a digital signal and then sends the digital signal to the main control unit, the Hall rotor position sensor is used for detecting the rotor position of the direct-current brushless motor, the Hall rotor position sensor is connected with the Hall signal shaping circuit, and the Hall signal shaping circuit sends the shaped Hall signal to the main control unit;

the failure setting device includes at least: the fault controller is in wireless communication with the upper computer, the output end of the fault controller is respectively connected with the control ends of the motor temperature sensor signal line fault module, the positive relay power supply line fault module, the negative relay power supply line fault module and the pre-charging relay power supply line fault module, the motor temperature sensor signal line fault module is connected between the motor temperature sensor and the temperature acquisition module in series, the positive relay power supply line fault module is connected between the high-voltage interface and the main positive control relay in series, the negative relay power supply line fault module is connected between the high-voltage interface and the main negative control relay in series, and the power supply line fault module of the pre-charging relay is connected in series between the high-voltage interface and the pre-charging relay.

2. The practical training device for the electric vehicle motor system according to claim 1, wherein the inverter unit is an IGBT module and further comprises an IGBT temperature sensor, and the IGBT temperature sensor is connected with the temperature acquisition module.

3. The practical training device for the motor system of the electric automobile according to claim 2, wherein the motor system simulation circuit board further comprises a bootstrap booster circuit, the self-boosting circuit is formed by connecting a diode and a capacitor in series, the anode of the diode is connected with 12V voltage, the cathode of the diode is connected with the anode of the capacitor, and the cathode of the capacitor is connected with a power supply end of the IGBT module, so that the voltage of the IGBT module is boosted.

4. The practical training device for the electric vehicle motor system according to claim 3, wherein an IGBT driving current collecting module and an IGBT power voltage collecting module are connected in series on a positive line between the main positive control relay and the pre-charging relay pre-IGBT module, and the IGBT driving current collecting module and the IGBT power voltage collecting module are further connected with the main control unit.

5. The practical training device for the electric vehicle motor system according to claim 4, wherein a current measuring module is further connected in series on a line connecting the IGBT module and the DC brushless motor, and the current measuring module is connected with the main control unit.

6. The practical training device for the electric vehicle motor system according to claim 5, wherein the fault setting module further comprises an IGBT temperature sensor signal line fault module, an IGBT power voltage acquisition fault module and an IGBT driving current acquisition fault module, control ends of the IGBT temperature sensor signal line fault module, the IGBT power voltage acquisition fault module and the IGBT driving current acquisition fault module are respectively connected with a fault controller, the IGBT temperature sensor signal line fault module is connected in series between the IGBT temperature sensor and the temperature acquisition module, the IGBT power voltage acquisition fault module is connected in series between the IGBT power voltage acquisition module and the IGBT module, and the IGBT driving current acquisition fault module is connected in series between the IGBT driving current acquisition module and the IGBT module.

7. The practical training device for the electric vehicle motor system according to claim 6, wherein each fault module is composed of a breaking relay and a virtual relay which are connected in parallel, the control ends of the breaking relay and the virtual relay are respectively connected with the fault controller, the normally closed contact of the breaking relay is an output end, and the normally open contact of the virtual relay is connected with a resistor in series and then is used as an output end.

8. The practical training device for the electric vehicle motor system according to any one of claims 1 to 7, wherein the fault indicator lamp comprises a motor temperature sensor signal line fault lamp, a positive relay power supply line fault lamp, a negative relay power supply line fault lamp, a pre-charge relay power supply line fault lamp, an IGBT temperature sensor signal line fault lamp, an IGBT power supply voltage acquisition fault lamp and an IGBT driving current acquisition fault lamp.

9. The practical training device for the motor system of the electric automobile according to claim 8, wherein the main control unit adopts an STM32F105VC single chip microcomputer chip.

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