CN203310975U - A purely-electric vehicle driving system test board - Google Patents

Abstract

The utility model relates to a pure electric vehicle drive system test bench, which is used for performance testing of a motor under test. The test bench includes a dynamometer, a dynamometer controller, a motor controller under test, a main console and a battery pack. The dynamometer is connected to the motor under test through the flywheel group and the torque/speed sensor; the controller of the dynamometer regulates and controls the dynamometer; the controller of the motor under test regulates and controls the motor under test; the main console receives the torque / The signal transmitted by the speed sensor, and the signal is processed to control the operation of the dynamometer controller and the motor controller under test in real time; the battery pack charges the dynamometer controller and the motor controller under test. Compared with the prior art, the utility model can simulate the driving resistance and the inertia of the vehicle under various road conditions, and can completely test the performance of the traction motor and the power battery pack of the electric vehicle.

Description

A pure electric vehicle drive system test bench

technical field

The utility model relates to the field of electric vehicle motor testing, in particular to a pure electric vehicle driving system testing platform.

Background technique

Some key technologies in the research and development of electric vehicles, especially the electric motor and control system as one of the four key technologies of electric vehicles, its performance test needs to be completed on the test bench, and the electric vehicle test bench just provides a solution to the above key technologies. research platform. At present, the research and development of electric vehicles is mainly carried out in three ways: computer simulation, indoor bench test and outdoor road real vehicle test. Computer simulation has the advantages of strong adaptability, low cost, and short development cycle. However, it is difficult to obtain accurate results due to the constraints of complex mathematical models of power systems. The reliability and usability of simulation results must be tested by other means. The outdoor road real vehicle test can provide a real operating environment for the development object, but the cost is high, the adaptability is poor, and the test and adjustment are difficult. The indoor bench test has the advantage of not being restricted by the external natural environment. The layout of its components can not be limited by the overall layout of the vehicle. The modularization of the test bench can also be used for different types of motors and their controllers, batteries and Its management module and vehicle controller provide the required test environment. The final establishment of the electric vehicle drive system test platform can comprehensively detect the control target of the electric vehicle, and can better solve the problems that restrict the development of electric vehicles, thereby shortening the test cycle of vehicle testing and calibration, and reducing the risk of electric vehicle development and cost, my country's electric vehicle test platform research has made some achievements, but there are still various deficiencies, so it is necessary to develop a performance test platform for electric vehicle drive system with complete functions, high measurement accuracy and reasonable cost performance.

Utility model content

The purpose of this utility model is to provide a pure electric vehicle drive system test bench in order to overcome the above-mentioned defects in the prior art. The test bench can simulate driving resistance and vehicle inertia under various road conditions, and can completely test electric vehicle traction The performance of the motor and power battery pack.

The purpose of this utility model can be achieved through the following technical solutions:

A pure electric vehicle drive system test bench is used to perform performance tests on the motor under test, and the test bench includes:

Dynamometer: connected to the motor under test through a flywheel set and a torque/rotational speed sensor;

Dynamometer controller: connected with the dynamometer to adjust and control the dynamometer;

The motor controller under test: connect with the motor under test, and regulate and control the motor under test;

Main console: respectively connected with the dynamometer controller, the motor controller under test and the torque/speed sensor, receives the signal transmitted by the torque/speed sensor, and processes the signal, and controls the dynamometer controller and the torque sensor in real time. Operation of the motor controller under test;

Battery pack: respectively connected to the dynamometer controller and the motor controller under test to charge the dynamometer controller and the motor controller under test.

The dynamometer, the flywheel group, the torque/rotational speed sensor and the motor under test are all connected with a shaft coupling through a transmission shaft.

The torque/speed sensor is connected to the main console through a signal conditioning unit and a data acquisition card in turn.

The battery pack is charged by a battery charger.

The dynamometer and the motor under test are connected by a transmission shaft, and a flywheel set is installed between the dynamometer and the motor under test to simulate various driving inertias of the electric vehicle during road driving. The battery pack charges the dynamometer controller and the tested motor controller, and the battery pack is charged by the battery charger. At the same time, the regenerative braking energy of the tested motor can be fed back to the battery pack to realize energy recycling. When the motor under test is in electric operation and the dynamometer runs in the power generation mode, the electric energy it sends out is fed back to the battery pack, and the electric energy fed back by the dynamometer and the battery pack are used as the energy source of the motor under test to form energy feedback; The motor under test is used for power generation operation, the dynamometer drives the motor under test to run, the electric energy sent by the motor under test is fed back to the battery pack, and the electric energy fed back by the motor under test and the battery pack are used as the energy source of the dynamometer to realize energy feedback . The torque/speed sensor installed between the flywheel group and the motor under test is used to monitor the running status of the motor under test in real time. The information is sent to the main console through the signal conditioning unit and the data acquisition card, and all devices are unified by the main console. management control.

The test bench is divided into a motor and its controller test module, a vehicle translational inertia simulation module, a load simulation module, an energy management module and a data acquisition module. The motor and its controller test module is used to test the performance of the motor and its control system, and complete the start-up test, power test, regenerative braking test, economy and mileage test of the electric vehicle; the vehicle translational inertia simulation and its control The module is used for electric vehicles of different qualities, using the corresponding inertia simulation equivalent, so that the test bench has a wider range of applications; the load simulation and its control module is used to simulate various driving resistances during the road driving of electric vehicles, so that The bench test can truly reflect the road operation status of the car; the energy management and its control module are used to realize the performance test of the battery, and can complete the braking energy recovery of the electric vehicle; the data acquisition module is used to monitor the motor speed, Real-time monitoring of transmission gear position, air valve working status and other data, in order to adjust and control the system reasonably on the host computer.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

The test bench of the utility model can simulate driving resistance and vehicle inertia under various road conditions, can completely test the performance of electric vehicle traction motors and power battery packs, and can meet the requirements of accurate loading tests and power battery packs within the entire power range of electric vehicle power systems. Discharge performance test needs. The test bench monitors the speed of the motor under test, the gear position of the transmission, the working state of the air valve, etc. Regenerative braking test, economy and driving range test.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1 is the dynamometer, 2 is the motor under test, 3 is the flywheel group, 4 is the torque/speed sensor, 5 is the coupling, 6 is the transmission shaft, 7 is the signal conditioning unit, 8 is the data acquisition card , 9 is the main console, 10 is the motor controller under test, 11 is the dynamometer controller, 12 is the battery pack, and 13 is the battery charger.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

A pure electric vehicle drive system test bench, as shown in Figure 1, performs a performance test on the motor under test 2, and the test bench includes a dynamometer 1, a dynamometer controller 11, a motor controller under test 10, and a main console 9 and the battery pack 12, the dynamometer 1 is connected to the motor 2 to be tested through the flywheel 3 and the torque/speed sensor 4, and the dynamometer 1, the flywheel 3, the torque/speed sensor 4 and the motor 2 to be tested Both are connected with the shaft coupling 5 through the transmission shaft 6 . The dynamometer controller 11 is connected with the dynamometer 1 to regulate and control the dynamometer 1; the tested motor controller 10 is connected to the tested motor 2 to regulate and control the tested motor 2; the main console 9 is connected to the The dynamometer controller 11, the motor controller 10 under test and the torque/speed sensor 4 are connected, and the torque/speed sensor 4 is connected with the main console 9 through the signal conditioning unit 7 and the data acquisition card 8 in turn, and the main console 9 Receive the signal transmitted by the torque/speed sensor 4, and process the signal, and control the operation of the dynamometer controller 11 and the motor controller 10 under test in real time; The motor controller 10 is connected to charge the dynamometer controller 11 and the motor controller 10 under test. The battery pack 12 is charged by a battery charger 13 .

The flywheel set 3 installed between the dynamometer 1 and the motor under test 2 is used to simulate various driving inertias during road driving of the electric vehicle. The battery pack 12 charges the dynamometer controller 11 and the tested motor controller 10, the battery pack 12 is charged by the battery charger 13, and at the same time, the regenerative braking energy of the tested motor 2 can be fed back to the battery pack 12 to realize energy recovery. Recycling. When the motor under test 2 performs electric operation, the dynamometer 1 operates in the power generation mode, and the electric energy it sends out is fed back to the battery pack 12, and the electric energy fed back by the dynamometer 1 and the battery pack 12 are jointly used as the energy source of the motor under test 2, forming energy feedback; when the motor under test 2 is running for power generation, the dynamometer 1 drives the motor under test 2 to run, the electric energy sent by the motor under test 2 is fed back to the battery pack 12, and the electric energy fed back by the motor under test 2 is the same as that of the battery pack 12 Together as the energy source of the dynamometer 1, energy feedback is realized. The torque/speed sensor 4 that is provided with in the middle of the flywheel group 3 and the tested motor 2 is used for real-time monitoring of the running state of the tested motor 2, and the information is sent to the main console 9 through the signal conditioning unit 7 and the data acquisition card 8, each The equipment is all subject to the unified management and control of the main console 9 .

The dynamometer 1 in this test bench replaces the wheels to carry out the loading torque, and the inertial resistance of the vehicle is simulated by the flywheel group 3, and the running condition of the motor 2 under test on the test bench is monitored in real time through the torque/rotational speed sensor 4, and then according to the 2 torque speed, as well as the simulated driving road gradient and the parameters of the car, etc. to calculate the various resistances encountered by the car during driving, to control the braking torque applied by the dynamometer 1 to the motor 2 under test. Simulates the effect of driving resistance in real time.

The main console 9 host computer of the test bench is developed with LabVIEW software, which is used to control the operation of the motor equipment during the entire test process. In addition to the general functions such as automatic drawing of torque and speed characteristic curves, it can also calculate the torque according to the set speed curve. Control signal control, simulate various load states, realize dynamic test, and can dynamically simulate the load of the car under various speeds, road conditions, and operating conditions.

Claims (4)

1. a pure electric automobile drive system test board, to by measured motor, being carried out performance test, is characterized in that, described test board comprises:

Dynamometer machine: by flywheel group and torque/speed sensor with by measured motor, be connected;

Dynamometer Control device: be connected with dynamometer machine, dynamometer machine is regulated to control;

Tested electric machine controller: with by measured motor, be connected, to by measured motor, being regulated control;

Master console: be connected with Dynamometer Control device, tested electric machine controller and torque/speed sensor respectively, receive the signal of torque/speed sensor passes, and this signal is processed, control in real time the operation of Dynamometer Control device and tested electric machine controller;

Electric battery: be connected with Dynamometer Control device and tested electric machine controller respectively, be Dynamometer Control device and the charging of tested electric machine controller.

2. a kind of pure electric automobile drive system test board according to claim 1, is characterized in that, described dynamometer machine, flywheel group, torque/speed sensor and all by transmission shaft, be connected with shaft coupling between measured motor.

3. a kind of pure electric automobile drive system test board according to claim 1, is characterized in that, described torque/speed sensor is connected with master console by signal condition unit and data collecting card successively.

4. a kind of pure electric automobile drive system test board according to claim 1, is characterized in that, described electric battery is charged by electric battery electrifier.