Practical training platform for installation, adjustment and maintenance of electric drive system

Abstract

The invention discloses a practical training platform for installation, adjustment and maintenance of an electric drive system. The practical training platform comprises a power supply system, a drive motor assembly, a fault setting and detecting system, a disassembly and assembly mechanism and a control system, the driving motor assembly is used for simulating power driving of a vehicle and providing a detection source of the practical training platform; the fault setting and detecting system is used for manually setting faults so as to simulate faults of a vehicle and can measure circuit parameters of the system; the control system comprises a control switch, a motor controller and upper computer software installed in a touch screen. According to the invention, the functions of adjustment, maintenance, teaching and examination of the new energy automobile electric driving system can be realized, students can deeply understand the control principle of the electric driving system, and the capabilities of disassembly, assembly and debugging of the electric driving system, detection and maintenance of the electric driving system, insulation test and air tightness test of the electric driving system and the like can be improved.

Description

Technical Field

[0001] The invention relates to the research field of electric drive systems, and in particular to an electric drive system assembly, adjustment and maintenance training platform. Background Art

[0002] In teaching and experiments, the existing drive motor assembly adjustment and maintenance training platform only has a motor and a reducer, and can only disassemble and assemble the drive motor assembly. It is unable to perform dynamic control operation of the motor, set and eliminate faults, calibrate the motor position, and set motor operating parameters. Summary of the invention

[0003] In order to solve the existing problems, the present invention provides an electric drive system installation, adjustment and maintenance training platform, the specific scheme is as follows:

[0004] An electric drive system installation, adjustment and maintenance training platform, comprising a power supply system, a drive motor assembly, a fault setting and detection system, a disassembly and assembly mechanism and a control system; the power supply system is used to provide power supply for the entire training platform;

[0005] The drive motor assembly is used to simulate the power drive of the vehicle and provide a detection source for the training platform;

[0006] The fault setting and detection system is used to manually set faults to simulate vehicle faults and can measure various circuit parameters of the system;

[0007] The disassembly and assembly mechanism is used to realize the disassembly and assembly of the drive motor assembly;

[0008] The control system includes a control switch, a motor controller and a host computer software installed in a touch screen, which is used to receive signals from a rotary transformer, a gear switch, an accelerator pedal, a brake switch, etc., and convert direct current into three-phase alternating current according to the received signals and provide it to the motor for driving the motor to operate, and display the motor speed, vehicle speed, throttle and other signals in real time. At the same time, the motor operating parameters can be set to make the motor rotate in different states.

[0009] Preferably, the power supply system includes a DC power supply, a DC voltage converter, a high-voltage distribution box, a low-voltage distribution box, a start switch and a power indicator light; the DC power supply converts 220V AC power into 80V DC power to provide power supply for the system; the DC voltage converter converts the 80V DC power of the DC power supply into 13.8V low-voltage DC power; the high-voltage distribution box includes a positive contactor, a negative contactor and a DC fuse that are electrically connected to the DC power supply and the DC voltage converter, and are used for the distribution of high-voltage electric energy 80V and high-voltage circuit protection; the low-voltage distribution box includes relays and fuses for the distribution of low-voltage electric energy 13.8v and low-voltage circuit protection; the start switch and the power indicator light are used to control and indicate the output and disconnection of the low-voltage power supply 13.8V.

[0010] Preferably, the drive motor assembly includes a drive motor and a reducer; the drive motor is a permanent magnet synchronous motor, the reducer is a single-speed fixed gear ratio reducer, and the motor and the reducer are matched with each other; the motor assembly is an automotive-grade product, and the motor peak power is 50kW.

[0011] Preferably, the fault setting and detection system includes a fault setting box and a parameter measurement box; the fault setting box is used to set open circuit, short circuit, virtual connection and other fault types in the system low-voltage circuit to simulate vehicle faults; the parameter measurement box is provided with a measurement panel, on which detection terminals are installed, and each detection terminal is marked with a terminal definition, the detection terminal is electrically connected to the control unit terminal or the component terminal, and various circuit parameters of the system can be measured; the measurement panel is provided with detection terminals for signals such as three-phase electricity, rotary transformer, and accelerator pedal, and a multimeter or oscilloscope can be used to measure voltage signals, waveform signals and frequency signals in different states, and fault detection and troubleshooting training can be carried out by comparing standard data with data under fault.

[0012] Preferably, 220V AC is electrically connected to the input of the leakage protector, the live wire output of the leakage protector is electrically connected to the emergency stop switch, the output of the emergency stop switch is electrically connected to the input of the soft start board, the neutral wire and ground wire outputs of the leakage protector are electrically connected to the input of the soft start board, the output of the soft start board is electrically connected to the input of the DC power supply, and the positive and negative outputs of the DC power supply are divided into two paths for transmission after the positive pole passes through a 40A fuse:

[0013] One path: The positive and negative output terminals of the DC power supply are electrically connected to the positive and negative input terminals of the DC voltage converter. After voltage conversion, a low-voltage DC power of about 13.8V is output; the DC voltage converter control terminal is electrically connected to the positive terminal of the input terminal as a control signal of the DC voltage converter; the negative output terminal of the DC voltage converter is electrically connected to the DC- detection terminal of the parameter measurement panel, which is used to detect the low-voltage negative parameters of the test bench;

[0014] After the positive output end of the DC voltage converter passes through a 20A fuse, one path is electrically connected to the electromagnetic coil input end of the start relay through the start switch, the electromagnetic coil output end is electrically connected to the fault setting box input end IN, and the fault setting box output end OUT is electrically connected to the negative pole of the DC voltage converter to form a loop; the other path is electrically connected to the start relay contact input end, and the contact output end is electrically connected to the parameter measurement panel DC+ detection end, which is used to detect the low-voltage positive pole parameters of the test bench;

[0015] At the same time, the output end of the start relay contact is electrically connected to the input end of the power indicator light, and the output end of the power indicator light is electrically connected to the negative pole of the DC voltage converter to form a loop; the output end of the start relay contact is connected in parallel with two 10A fuses and then electrically connected to the input end IN of the fault setting box, and the output end OUT of the fault setting box is electrically connected to the positive and negative contactor electromagnetic coil input ends respectively; at the same time, the output end OUT of the fault setting box is electrically connected to the positive + and negative + detection ends of the parameter measurement panel, which are used to detect the input parameters of the electromagnetic coil; the output ends of the electromagnetic coil are electrically connected to the input end IN of the fault setting box, and the output ends OUT of the fault setting box are electrically connected to the negative pole of the DC voltage converter to form a loop; at the same time, the input end IN of the fault setting box is electrically connected to the positive - and negative - detection ends of the parameter measurement panel, which are used to detect the output parameters of the electromagnetic coil;

[0016] Another way: the positive and negative output terminals of the DC power supply are electrically connected to the positive and negative contactor contact input terminals, and the contact output terminals are electrically connected to the B+ and B- input terminals of the motor controller; the motor controller control terminal is electrically connected to the motor controller input terminal B+ as the control signal of the motor controller; the motor controller B+ and B- input terminals are electrically connected to the parameter measurement panel B+ and B- detection terminals for detecting the DC high voltage output parameters;

[0017] The three-phase alternating current at the output terminals U, V, and W of the motor controller is electrically connected to the U, V, and W input terminals of the motor; at the same time, the three-phase alternating current at the output terminals U, V, and W of the motor controller is electrically connected to the U signal, V signal, and W signal detection terminals of the parameter measurement panel for detecting the AC high-voltage output parameters; the rotary transformer installed in the motor is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller for measuring the speed, position, and direction of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the exc+, exc-, sin+, sin-, cos+, and cos- detection terminals of the parameter measurement panel for detecting the rotary transformer parameters; the temperature sensor installed in the motor is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller for measuring the temperature of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the temperature+ and temperature- detection terminals of the parameter measurement panel for detecting the temperature parameters of the motor;

[0018] The gear switch is installed below the measurement panel, the gear switch harness is electrically connected to the fault setting box input terminal IN, and the fault setting box output terminal OUT is electrically connected to the motor controller input terminal as the forward, reverse, and neutral signals of the motor; at the same time, the fault setting box output terminal OUT is electrically connected to the parameter measurement panel gear +, gear signal, and gear - detection terminals for detecting the gear switch parameters;

[0019] The accelerator pedal is installed at the bottom of one side of the test bench, and the accelerator pedal harness is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller as the acceleration and deceleration signal of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the throttle +, throttle signal, and throttle - detection terminals of the parameter measurement panel for detecting the throttle pedal parameters;

[0020] The brake pedal is installed under the stand on one side of the accelerator pedal. The brake switch harness is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller as the brake signal of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the brake + and brake - detection terminals of the parameter measurement panel for detecting the brake switch parameters;

[0021] The output terminal of the indicator light of the motor controller is electrically connected to the input terminal of the Ready indicator light, which is used to indicate whether the motor controller can work normally; the output terminal of the communication line of the motor controller is electrically connected to the communication input terminal of the touch screen; the touch screen is installed above the bench, and the upper computer software of the motor controller is installed in the touch screen, which is used to display the relevant parameters of the motor; the power line of the touch screen is electrically connected to the output terminal of the leakage protector;

[0022] When the start switch is closed, the electromagnetic coil of the start relay is energized, the contacts are closed, and the power indicator light is on; then, the positive and negative contactor electromagnetic coils are energized, the contactor contacts are closed, the motor controller B+ and B- input terminals receive the power supply voltage, and the control terminal receives the control voltage; the motor controller starts self-testing, and if the self-test is correct, the Ready indicator light is on; if the self-test fails, the Ready indicator light is off, and a buzzer alarm sounds;

[0023] Shift to D or R gear and step on the accelerator to enable the motor to move in the forward and reverse directions. Step on the brake pedal to gradually decelerate the motor. At the same time, the real-time speed, throttle signal voltage, brake signal and other parameters can be displayed on the touch screen.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention can perform fault settings to simulate vehicle faults. The detection port on the detection panel is used to perform fault diagnosis and troubleshooting to deeply study the control principle of the electric drive system.

[0026] 2. Calibrate the motor position and set the motor operating parameters to make the motor rotate in different states to deeply learn the control logic of the motor controller.

[0027] 3. The platform motor controller can update software online to support the latest electric drive system technology and standards.

[0028] 4. The platform can not only use 220V AC as the power supply, but also has a power battery power supply interface reserved in the power cabinet, which can be interconnected with the high-voltage electric control maintenance training platform to realize the linkage operation of the motor and power battery module.

[0029] In summary, the invention can realize the functions of installation, adjustment, maintenance, teaching and assessment of the electric drive system of new energy vehicles. It can not only enable students to deeply understand the control principle of the electric drive system, but also improve their ability to disassemble and debug the electric drive system, detect and repair the electric drive system, and test the insulation and air tightness of the electric drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 is a circuit schematic diagram of the present invention;

[0032] Figure 2 It is a schematic diagram of the slide structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the flip mechanism structure.

[0034] The reference numerals are as follows:

[0035] 1. Flip bracket one, 101. Upper surface of flip bracket one, 2. Flip bracket two, 201. Lower surface of flip bracket two, 3. Ball screw, 4. Slide, 5. Double linear rail, 6. Slider, 7. Workbench, 8. Handwheel, 9. Customizable motor plate, 10. Reducer fixing bracket. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The electric drive system installation, adjustment and maintenance training platform takes the original drive motor of new energy vehicles as the core, and is equipped with a motor controller, power supply system, and fault setting and detection system. While realizing the separation and assembly of the drive motor and the reducer, the disassembly and assembly of the drive motor and the reducer, the state demonstration of the operation of the permanent magnet synchronous motor can be realized through the electronic control system and DC power supply, including dynamic operation tests of starting, gear switching, acceleration and deceleration, and braking. At the same time, the drive control system can also be set up through the fault setting system, data detection and other principle teaching.

[0038] Specifically, Figure 1 , an electric drive system assembly, adjustment and maintenance training platform, including a power supply system, a drive motor assembly, a fault setting and detection system, a disassembly and assembly mechanism and a control system; the power supply system is used to provide power for the entire training platform.

[0039] The power supply system includes a DC power supply, a DC voltage converter, a high-voltage distribution box, a low-voltage distribution box, a start switch and a power indicator light; the DC power supply converts 220V AC power into 80V DC power to provide power supply for the system; the DC voltage converter converts the 80V DC power of the DC power supply into 13.8V low-voltage DC power; the high-voltage distribution box includes a positive contactor, a negative contactor and a DC fuse that are electrically connected to the DC power supply and the DC voltage converter, and are used for the distribution of high-voltage electric energy 80V and high-voltage circuit protection; the low-voltage distribution box includes relays and fuses, which are used for the distribution of low-voltage electric energy 13.8v and low-voltage circuit protection; the start switch and the power indicator light are used to control and indicate the output and disconnection of the low-voltage power supply 13.8V.

[0040] The drive motor assembly is used to simulate the power drive of the vehicle and provide a detection source for the training platform. The drive motor assembly includes a drive motor and a reducer; the drive motor is a permanent magnet synchronous motor, the reducer is a single-speed fixed gear ratio reducer, and the motor and reducer are matched with each other; the motor assembly is a vehicle-grade product with a peak motor power of 50kW.

[0041] Specifically, the drive motor is a permanent magnet synchronous motor, and the reducer is a single-speed fixed gear ratio reducer. The motor and reducer are matched with each other; the motor assembly is a vehicle-grade product, and the motor peak power is 50kW. The drive motor and reducer can be separated and assembled, and the drive motor and reducer can be disassembled and assembled; the reducer housing can be flipped 360°, which is convenient for the disassembly and inspection of internal gear sets, bearings, oil seals and other components.

[0042] The fault setting and detection system is used to manually set faults, simulate vehicle faults, and measure various circuit parameters of the system. The fault setting and detection system includes a fault setting box and a parameter measurement box; the fault setting box is used to set fault types such as open circuit, short circuit, virtual connection, etc. in the system low-voltage circuit to simulate vehicle faults; the parameter measurement box is provided with a measurement panel, and a detection terminal is installed on the measurement panel, and each detection terminal is marked with a terminal definition. The detection terminal is electrically connected to the control unit terminal or the component terminal, and various circuit parameters of the system can be measured; the measurement panel is provided with detection terminals for signals such as three-phase electricity, rotary transformer, and accelerator pedal. A multimeter or oscilloscope can be used to measure voltage signals, waveform signals, and frequency signals in different states. By comparing standard data with data under fault, fault detection and troubleshooting training can be carried out.

[0043] The disassembly and assembly mechanism is used to realize the disassembly and assembly of the drive motor assembly.

[0044] The control system includes a control switch, a motor controller and a host computer software installed in a touch screen, which is used to receive signals from a rotary transformer, a gear switch, an accelerator pedal, a brake switch, etc., and convert direct current into three-phase alternating current according to the received signals and provide it to the motor for driving the motor to operate, and display the motor speed, vehicle speed, throttle and other signals in real time. At the same time, the motor operating parameters can be set to make the motor rotate in different states.

[0045] Specifically, the motor controller selected by the present invention is a low-voltage AC controller for automobiles that integrates control and drive. It can receive signals from a rotary transformer, a gear switch, an accelerator pedal, a brake switch, etc.; according to the above signals, it converts 80V DC into three-phase AC power and provides it to the motor for driving the motor to operate;

[0046] The motor controller has a host computer software installed in the touch screen, which can not only display the motor speed, vehicle speed, throttle and other signals in real time, but also set the motor operation parameters to make the motor rotate in different states.

[0047] The circuit working principle of the present invention is as follows: 220V AC is electrically connected to the input end of the leakage protector, the live wire output end of the leakage protector is electrically connected to the emergency stop switch, the output end of the emergency stop switch is electrically connected to the input end of the soft start board, the neutral wire and ground wire output ends of the leakage protector are electrically connected to the input end of the soft start board, the output end of the soft start board is electrically connected to the input end of the DC power supply, the positive and negative output ends of the DC power supply and the positive electrode are divided into two paths for transmission after passing through a 40A fuse:

[0048] One path: The positive and negative output terminals of the DC power supply are electrically connected to the positive and negative input terminals of the DC voltage converter. After voltage conversion, a low-voltage DC power of about 13.8V is output; the DC voltage converter control terminal is electrically connected to the positive terminal of the input terminal as a control signal of the DC voltage converter; the negative output terminal of the DC voltage converter is electrically connected to the DC- detection terminal of the parameter measurement panel, which is used to detect the low-voltage negative parameters of the test bench;

[0049] After the positive output end of the DC voltage converter passes through a 20A fuse, one path is electrically connected to the electromagnetic coil input end of the start relay through the start switch, the electromagnetic coil output end is electrically connected to the fault setting box input end IN, and the fault setting box output end OUT is electrically connected to the negative pole of the DC voltage converter to form a loop; the other path is electrically connected to the start relay contact input end, and the contact output end is electrically connected to the parameter measurement panel DC+ detection end, which is used to detect the low-voltage positive pole parameters of the test bench;

[0050] At the same time, the output end of the start relay contact is electrically connected to the input end of the power indicator light, and the output end of the power indicator light is electrically connected to the negative pole of the DC voltage converter to form a loop; the output end of the start relay contact is connected in parallel with two 10A fuses and then electrically connected to the input end IN of the fault setting box, and the output end OUT of the fault setting box is electrically connected to the positive and negative contactor electromagnetic coil input ends respectively; at the same time, the output end OUT of the fault setting box is electrically connected to the positive + and negative + detection ends of the parameter measurement panel, which are used to detect the input parameters of the electromagnetic coil; the output ends of the electromagnetic coil are electrically connected to the input end IN of the fault setting box, and the output ends OUT of the fault setting box are electrically connected to the negative pole of the DC voltage converter to form a loop; at the same time, the input end IN of the fault setting box is electrically connected to the positive - and negative - detection ends of the parameter measurement panel, which are used to detect the output parameters of the electromagnetic coil;

[0051] Another way: the positive and negative output terminals of the DC power supply are electrically connected to the positive and negative contactor contact input terminals, and the contact output terminals are electrically connected to the B+ and B- input terminals of the motor controller; the motor controller control terminal is electrically connected to the motor controller input terminal B+ as the control signal of the motor controller; the motor controller B+ and B- input terminals are electrically connected to the parameter measurement panel B+ and B- detection terminals for detecting the DC high voltage output parameters;

[0052] The three-phase alternating current at the output terminals U, V, and W of the motor controller is electrically connected to the U, V, and W input terminals of the motor; at the same time, the three-phase alternating current at the output terminals U, V, and W of the motor controller is electrically connected to the U signal, V signal, and W signal detection terminals of the parameter measurement panel for detecting the AC high-voltage output parameters; the rotary transformer installed in the motor is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller for measuring the speed, position, and direction of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the exc+, exc-, sin+, sin-, cos+, and cos- detection terminals of the parameter measurement panel for detecting the rotary transformer parameters; the temperature sensor installed in the motor is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller for measuring the temperature of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the temperature+ and temperature- detection terminals of the parameter measurement panel for detecting the temperature parameters of the motor;

[0053] The gear switch is installed below the measurement panel, the gear switch harness is electrically connected to the fault setting box input terminal IN, and the fault setting box output terminal OUT is electrically connected to the motor controller input terminal as the forward, reverse, and neutral signals of the motor; at the same time, the fault setting box output terminal OUT is electrically connected to the parameter measurement panel gear +, gear signal, and gear - detection terminals for detecting the gear switch parameters;

[0054] The accelerator pedal is installed at the bottom of one side of the test bench, and the accelerator pedal harness is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller as the acceleration and deceleration signal of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the throttle +, throttle signal, and throttle - detection terminals of the parameter measurement panel for detecting the throttle pedal parameters;

[0055] The brake pedal is installed under the stand on one side of the accelerator pedal. The brake switch harness is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller as the brake signal of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the brake + and brake - detection terminals of the parameter measurement panel for detecting the brake switch parameters;

[0056] The output terminal of the indicator light of the motor controller is electrically connected to the input terminal of the Ready indicator light, which is used to indicate whether the motor controller can work normally; the output terminal of the communication line of the motor controller is electrically connected to the communication input terminal of the touch screen; the touch screen is installed above the bench, and the upper computer software of the motor controller is installed in the touch screen, which is used to display the relevant parameters of the motor; the power line of the touch screen is electrically connected to the output terminal of the leakage protector;

[0057] When the start switch is closed, the electromagnetic coil of the start relay is energized, the contacts are closed, and the power indicator light is on; then, the positive and negative contactor electromagnetic coils are energized, the contactor contacts are closed, the motor controller B+ and B- input terminals receive the power supply voltage, and the control terminal receives the control voltage; the motor controller starts self-testing, and if the self-test is correct, the Ready indicator light is on; if the self-test fails, the Ready indicator light is off, and a buzzer alarm sounds;

[0058] Shift to D or R gear and step on the accelerator to enable the motor to move in the forward and reverse directions. Step on the brake pedal to gradually decelerate the motor. At the same time, the real-time speed, throttle signal voltage, brake signal and other parameters can be displayed on the touch screen.

[0059] The function of the soft start board mentioned above is to reduce the instantaneous impact current at startup and suppress surge current to avoid impact on electrical equipment such as lines and loads, so as to protect the drive motor and other electrical equipment from damage and extend their service life.

[0060] The slide structure of the present invention is as follows Figure 2 , the double-line rail four-slider ball screw slide is fixed to one side of the training table surface by bolts. The slide 4 is used to drive the separation of the motor and the transmission, and the ball screw 3 is moved to the end position to obtain the operating space. Among them, the double-line rail 5 is arranged on the slide 4, and the ball screw 3 is fixed just above the center of the slide 4, and is arranged along the direction of the length of the slide and parallel to the double-line rail 5. The double-line rail 5 is connected to the workbench 7 through the slider 6, and the motor support frame is fixed on the workbench 7 by bolts. The drive motor assembly is placed on the motor support frame 11 and fixed by bolts. A handwheel 8 is connected to one end of the slide 4. By turning the handwheel 8, the motor can be moved horizontally, providing operating space for the disassembly and assembly of the motor and the reducer. The other end of the slide 4 is a customizable motor plate 9.

[0061] like Figure 3 As shown, the flipping mechanism of the reducer: the platform can realize the disassembly, assembly and 360° flipping of the transmission. The flipping function is driven by the worm gear reducer, which has a self-locking function and can be fixed at any angle.

[0062] The lower surface of the flip bracket 1 is fixed to the training table surface by bolts, and the upper surface 101 of the flip bracket 1 is fixed with a worm gear reducer by bolts. The lower surface of the flip bracket 2 is fixed to the training table surface by bolts, and the upper surface 201 of the flip bracket 2 is fixed with a reducer fixing frame bearing seat by bolts. The reducer fixing frame 10 is fixedly connected to the reducer by bolts.

[0063] The input shaft of the worm gear reducer is equipped with a handwheel, which can realize 360-degree rotation of the reducer, making it easy to disassemble and assemble the reducer. The output shaft of the reducer is fixedly connected to one end of the reducer fixing frame 10, and the other end of the reducer fixing frame 10 is connected to the bearing in the bearing seat through a fixed shaft and can rotate through the bearing.

[0064] The slide table and the flip mechanism are placed vertically, that is, the center line of the driving motor and the center line of the flip mechanism are vertical in the horizontal direction.

[0065] A tool hanging plate is installed on the front of the training table for placing disassembly and assembly tools and parts.

[0066] A fault setting box, parameter measurement box and control switch are installed on one side of the training platform for training platform control, parameter detection and fault setting.

[0067] This invention can realize the functions of assembly, adjustment, inspection, teaching and assessment of electric drive assembly of new energy vehicles. It can not only enable students to deeply understand the control principle of electric drive system, but also improve the ability of disassembly, assembly and debugging of electric drive system, the ability of electric drive system inspection and maintenance, and the ability of electric drive system insulation test and air tightness test.

[0068] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

[0069] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric drive system installation, adjustment and maintenance training platform, characterized by: It includes a power supply system, a drive motor assembly, a fault setting and detection system, a disassembly and assembly mechanism, and a control system; the power supply system is used to provide power supply for the entire training platform; The drive motor assembly is used to simulate the power drive of the vehicle and provide a detection source for the training platform; The fault setting and detection system is used to manually set faults to simulate vehicle faults and can measure various circuit parameters of the system; The disassembly and assembly mechanism is used to realize the disassembly and assembly of the drive motor assembly; The control system includes a control switch, a motor controller and a host computer software installed in a touch screen, which is used to receive signals from a rotary transformer, a gear switch, an accelerator pedal, and a brake switch, and convert direct current into three-phase alternating current according to the received signals and provide it to the motor for driving the motor to operate, and display the motor speed, vehicle speed, and throttle signals in real time. At the same time, the motor operating parameters can be set to make the motor rotate in different states.

2. The electric drive system installation, adjustment and maintenance training platform according to claim 1 is characterized by: The power supply system includes a DC power supply, a DC voltage converter, a high-voltage distribution box, a low-voltage distribution box, a start switch and a power indicator light; the DC power supply converts 220V AC power into 80V DC power to provide power supply for the system; the DC voltage converter converts the 80V DC power of the DC power supply into 13.8V low-voltage DC power; the high-voltage distribution box includes a positive contactor, a negative contactor and a DC fuse that are electrically connected to the DC power supply and the DC voltage converter, and are used for the distribution of high-voltage electric energy 80V and high-voltage circuit protection; the low-voltage distribution box includes relays and fuses, which are used for the distribution of low-voltage electric energy 13.8v and low-voltage circuit protection; the start switch and the power indicator light are used to control and indicate the output and disconnection of the low-voltage power supply 13.8V.

3. The electric drive system installation, adjustment and maintenance training platform according to claim 1 is characterized by: The drive motor assembly includes a drive motor and a reducer; the drive motor is a permanent magnet synchronous motor, the reducer is a single-speed fixed gear ratio reducer, and the motor and the reducer are matched with each other; the motor assembly is an automotive-grade product, and the motor peak power is 50kW.

4. The electric drive system installation, adjustment and maintenance training platform according to claim 1 is characterized by: The fault setting and detection system includes a fault setting box and a parameter measurement box; the fault setting box is used to set the fault types of open circuit, short circuit and virtual connection in the system low-voltage circuit to simulate vehicle faults; the parameter measurement box is provided with a measurement panel, on which detection terminals are installed, and each detection terminal is marked with a terminal definition, and the detection terminal is electrically connected to the control unit terminal or the component terminal, so as to measure various circuit parameters of the system; the measurement panel is provided with detection terminals for three-phase electricity, rotary transformer and accelerator pedal signals, and a multimeter or oscilloscope can be used to measure voltage signals, waveform signals and frequency signals in different states, and fault detection and troubleshooting training can be carried out by comparing standard data with data under fault.

5. The electric drive system installation, adjustment and maintenance training platform according to any one of claims 1 to 4, characterized in that: The 220V AC power is electrically connected to the input of the leakage protector, the live wire output of the leakage protector is electrically connected to the emergency stop switch, the output of the emergency stop switch is electrically connected to the input of the soft start board, the neutral and ground wire outputs of the leakage protector are electrically connected to the input of the soft start board, the output of the soft start board is electrically connected to the input of the DC power supply, the positive and negative outputs of the DC power supply are connected, and the positive pole passes through a 40A fuse and is divided into two paths for transmission: One path: The positive and negative output terminals of the DC power supply are electrically connected to the positive and negative input terminals of the DC voltage converter. After voltage conversion, a low-voltage DC power of about 13.8V is output; the DC voltage converter control terminal is electrically connected to the positive terminal of the input terminal as a control signal of the DC voltage converter; the negative output terminal of the DC voltage converter is electrically connected to the DC- detection terminal of the parameter measurement panel, which is used to detect the low-voltage negative parameters of the test bench; After the positive output end of the DC voltage converter passes through a 20A fuse, one path is electrically connected to the electromagnetic coil input end of the start relay through the start switch, the electromagnetic coil output end is electrically connected to the fault setting box input end IN, and the fault setting box output end OUT is electrically connected to the negative pole of the DC voltage converter to form a loop; the other path is electrically connected to the start relay contact input end, and the contact output end is electrically connected to the parameter measurement panel DC+ detection end, which is used to detect the low-voltage positive pole parameters of the test bench; At the same time, the output end of the start relay contact is electrically connected to the input end of the power indicator light, and the output end of the power indicator light is electrically connected to the negative pole of the DC voltage converter to form a loop; the output end of the start relay contact is connected in parallel with two 10A fuses and then electrically connected to the input end IN of the fault setting box, and the output end OUT of the fault setting box is electrically connected to the positive and negative contactor electromagnetic coil input ends respectively; at the same time, the output end OUT of the fault setting box is electrically connected to the positive + and negative + detection ends of the parameter measurement panel, which are used to detect the input parameters of the electromagnetic coil; the output ends of the electromagnetic coil are electrically connected to the input end IN of the fault setting box, and the output ends OUT of the fault setting box are electrically connected to the negative pole of the DC voltage converter to form a loop; at the same time, the input end IN of the fault setting box is electrically connected to the positive - and negative - detection ends of the parameter measurement panel, which are used to detect the output parameters of the electromagnetic coil; Another way: the positive and negative output terminals of the DC power supply are electrically connected to the positive and negative contactor contact input terminals, and the contact output terminals are electrically connected to the B+ and B- input terminals of the motor controller; the motor controller control terminal is electrically connected to the motor controller input terminal B+ as the control signal of the motor controller; the motor controller B+ and B- input terminals are electrically connected to the parameter measurement panel B+ and B- detection terminals for detecting the DC high voltage output parameters; The three-phase alternating current at the output terminals U, V, and W of the motor controller is electrically connected to the U, V, and W input terminals of the motor; at the same time, the three-phase alternating current at the output terminals U, V, and W of the motor controller is electrically connected to the U signal, V signal, and W signal detection terminals of the parameter measurement panel for detecting the AC high-voltage output parameters; the rotary transformer installed in the motor is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller for measuring the speed, position, and direction of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the exc+, exc-, sin+, sin-, cos+, and cos- detection terminals of the parameter measurement panel for detecting the rotary transformer parameters; the temperature sensor installed in the motor is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller for measuring the temperature of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the temperature+ and temperature- detection terminals of the parameter measurement panel for detecting the temperature parameters of the motor; The gear switch is installed below the measurement panel, the gear switch harness is electrically connected to the fault setting box input terminal IN, and the fault setting box output terminal OUT is electrically connected to the motor controller input terminal as the forward, reverse, and neutral signals of the motor; at the same time, the fault setting box output terminal OUT is electrically connected to the parameter measurement panel gear +, gear signal, and gear - detection terminals for detecting the gear switch parameters; The accelerator pedal is installed at the bottom of one side of the test bench, and the accelerator pedal harness is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller as the acceleration and deceleration signal of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the throttle +, throttle signal, and throttle - detection terminals of the parameter measurement panel for detecting the throttle pedal parameters; The brake pedal is installed under the stand on one side of the accelerator pedal. The brake switch harness is electrically connected to the input terminal IN of the fault setting box, and the output terminal OUT of the fault setting box is electrically connected to the input terminal of the motor controller as the brake signal of the motor; at the same time, the output terminal OUT of the fault setting box is electrically connected to the brake + and brake - detection terminals of the parameter measurement panel for detecting the brake switch parameters; The output terminal of the indicator light of the motor controller is electrically connected to the input terminal of the Ready indicator light, so as to indicate whether the motor controller can work normally; The output end of the motor controller communication line is electrically connected to the touch screen communication input end; the touch screen is installed above the stand, and the motor controller host computer software is installed in the touch screen to display motor related parameters; the touch screen power line is electrically connected to the output end of the leakage protector; When the start switch is closed, the electromagnetic coil of the start relay is energized, the contacts are closed, and the power indicator light is on; Then, the positive and negative contactor electromagnetic coils are energized, the contactor contacts are closed, the motor controller B+ and B- input terminals receive the power supply voltage, and the control terminal receives the control voltage; the motor controller starts self-checking, and if the self-check is correct, the Ready indicator lights up; if the self-check fails, the Ready indicator does not light up, and a buzzer alarm sounds; Shift to D or R gear and step on the accelerator to enable the motor to rotate forward and reverse. Step on the brake pedal to gradually slow down the motor. At the same time, the real-time speed, throttle signal voltage, and brake signal parameters can be displayed on the touch screen.

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