Electric drive system performance testing device with working condition simulation function

Abstract

The utility model belongs to the technical field of motor testing, and particularly relates to an electric drive system performance testing device with a working condition simulation function. Starting from practical application, the electric drive test platform is utilized to accurately control each module, simulation of real vehicle test working conditions (such as NEDC, WLTC, UDDS and the like) is realized, and operation parameters of a motor under the simulated working conditions can be acquired. By acquiring the motor parameters under the simulated working conditions, the motor data close to the real running state can be acquired, so that an analysis result with higher practical value is provided for motor performance optimization and development of a control strategy, the performance of the motor under different working conditions is improved, and the development of related technologies is promoted.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor test technical field, specifically a kind of electric drive system performance testing device with simulation working condition function. BACKGROUND

[0002] In the research and development and test process of electric drive system, the application of test platform is crucial. Traditional electric drive test mostly adopts real vehicle test mode, but real vehicle test is limited by environmental conditions, test cost and complexity, and it is difficult to cover various working conditions and extreme scenarios comprehensively. In order to solve the above problems, the technology based on electric drive test platform emerges as the times require. Electric drive test platform not only can flexibly set different roads and load conditions to simulate real vehicle test working condition, accurately reproduce the running state of electric drive system in actual vehicle, and real-time collect and record the key parameters of electric drive system. It can also realize the evaluation of motor performance through deep analysis of test data, and provide reliable data support for the optimization design and control strategy development of electric drive system. Compared with traditional real vehicle test, electric drive test platform reduces development cost, improves test efficiency, and makes development process more safe and controllable. The innovativeness of this patent technology lies in its ability to simulate real vehicle working condition comprehensively, so that it can be widely used in the design, verification and optimization process of electric drive system, and promote the technological progress of new energy vehicle industry. SUMMARY

[0003] The utility model aims at overcoming the insufficient of prior art, provide a kind of device that can simulate real vehicle test working condition comprehensively, and can also collect the operating parameter of motor under simulated working condition.

[0004] The technical scheme of the utility model is:

[0005] A kind of electric drive system performance testing device with simulation working condition function, including direct-current power supply, measured motor module, dynamometer, electronic load, power analyzer, torque speed sensor, signal conversion controller and industrial computer;

[0006] The direct-current power supply is connected with measured motor module, electronic load and power analyzer respectively by bus bar;

[0007] The measured motor module is connected with signal conversion controller, torque speed sensor and power analyzer respectively;

[0008] The torque speed sensor is connected with dynamometer and power analyzer respectively;

[0009] The signal conversion controller, dynamometer and power analyzer are connected with industrial computer respectively.

[0010] Furthermore, the motor under test module includes a motor under test controller and a motor under test, wherein the motor under test is one of an AC asynchronous motor, a brushless DC motor, and a permanent magnet synchronous motor; the control signal commands of the motor under test controller are obtained from the industrial control computer through a signal conversion controller.

[0011] Furthermore, the motor controller under test integrates a data acquisition module, and the acquired data is sent to the industrial control computer through a signal conversion controller.

[0012] Furthermore, if the dynamometer is a servo motor, it also includes a servo driver, which is connected between the servo motor and the industrial control computer.

[0013] The beneficial effects of this invention are as follows: Based on practical applications, this invention utilizes an electric drive testing platform to precisely control each module, achieving simulation of real-vehicle test conditions (such as NEDC, WLTC, UDDS, etc.) and collecting motor operating parameters under simulated conditions. By collecting these simulated motor parameters, motor data close to the actual operating state can be obtained, thus providing more practically valuable analytical results for motor performance optimization and control strategy development. This helps improve motor performance under different operating conditions and promotes the development of related technologies. Attached Figure Description

[0014] Figure 1 This is a structural block diagram of the present invention. Detailed Implementation

[0015] The technical principles and solutions of this utility model are described in detail below with reference to the accompanying drawings:

[0016] like Figure 1 As shown, the electric drive system performance testing device with simulated working conditions of this utility model includes an electronic load 1, a DC power supply 2, a motor controller 3, a motor under test 4, a torque and speed sensor 5, a dynamometer 6, a signal conversion controller 7, a power analyzer 8, an industrial computer 9, and a servo driver 10.

[0017] The electronic load 1 and DC power supply 2 are directly connected to the bus port of the motor under test controller 3. The signal conversion controller 7 is connected to the industrial computer 9 and the motor under test controller 3 respectively. The controller 3 drives the motor under test 4. The motor under test 4 forms a mechanical drag structure with the dynamometer 6 through a drive shaft and coupling. The torque and speed sensor 5 is placed in the middle of the drive shaft and is used to measure the torque and speed information of the electric drive system. The industrial computer 9 is connected to the servo driver 10 through a common digital signal communication bus. The power analyzer 8 collects the bus voltage, bus current, phase voltage, and phase current of the motor under test by directly connecting the phase terminals and the sensor through the terminal blocks; the power analyzer 8 collects the torque and speed by connecting to the output terminal of the torque and speed sensor 5, and then realizes real-time data transmission with the industrial computer 9 through the communication bus.

[0018] The working process of this device is as follows: A programmable DC power supply powers the motor under test. In electric mode, the industrial control computer sends a digital signal, which is converted into a vehicle motor communication bus signal by a signal conversion controller and sent to the motor under test controller to send an electric command. At this time, the motor under test operates in electric mode, and the controller outputs torque to drive the dynamometer to rotate to the ignition speed. Simultaneously, the industrial control computer sends a torque command to the servo driver. The torque output by the dynamometer simulates the mechanical load of the actual vehicle during startup. Because the load decreases as the speed increases during actual startup, the output torque of the dynamometer is set to a decreasing variable torque. Once the ignition speed is reached, the startup is complete. After startup, the industrial control computer sends a power generation command to the motor under test controller via the communication bus. At this time, the motor under test operates in power generation mode. Simultaneously, the industrial control computer sends a speed command to the servo driver via the communication bus, causing the dynamometer to operate in speed mode. In this mode, the dynamometer simulates the vehicle engine. In power generation mode, the dynamometer drives the motor under test to rotate, and the motor under test acts as a generator, converting mechanical energy into electrical energy. This electrical energy is consumed by an electronic load, thus simulating the load of the actual vehicle under power generation conditions. By importing data from different real-vehicle test conditions into an industrial control computer, and then controlling the motor and load through the industrial control computer, simulation of different test conditions can be achieved.

[0019] While simulating operating conditions, the power analyzer directly connects to the phase terminals via wiring terminals to acquire the bus voltage and phase voltage of the motor under test. It also acquires the bus current and phase current of the motor under test through Hall effect current sensors, and acquires torque and speed data by connecting to the output ports of torque and speed sensors. The power analyzer transmits the acquired data to the industrial control computer via a communication bus. Inside the motor controller, a data acquisition chip collects internal motor information and transmits it to the industrial control computer via a signal conversion controller. Finally, the industrial control computer stores, displays, and processes the acquired parameters.

[0020] The device of this invention can simulate different real vehicle test conditions on a test bench, such as NEDC, WLTC, UDDS, etc. By inputting data under different conditions, it controls the motor and load to operate according to the corresponding rules, thereby realizing the simulation of real vehicle test conditions.

Claims

1. A performance testing device for an electric drive system with simulated operating conditions, characterized in that, It includes a DC power supply, a motor module under test, a dynamometer, an electronic load, a power analyzer, a torque and speed sensor, a signal conversion controller, and an industrial computer; The DC power supply is connected to the motor module under test, the electronic load, and the power analyzer via a bus. The motor module under test is connected to a signal conversion controller, a torque and speed sensor, and a power analyzer, respectively. The torque and speed sensor is connected to the dynamometer and the power analyzer, respectively. The signal conversion controller, dynamometer, and power analyzer are respectively connected to the industrial control computer.

2. The electric drive system performance testing device with simulated operating conditions according to claim 1, characterized in that, The motor under test module includes a motor under test controller and a motor under test, wherein the motor under test is one of an AC asynchronous motor, a brushless DC motor, and a permanent magnet synchronous motor; the control signal commands of the motor under test controller are obtained from the industrial control computer through a signal conversion controller.

3. The electric drive system performance testing device with simulated operating conditions according to claim 2, characterized in that, The motor controller under test integrates a data acquisition module, and the acquired data is sent to the industrial control computer through a signal conversion controller.

4. The electric drive system performance testing device with simulated operating conditions according to claim 1, characterized in that, If the dynamometer is a servo motor, it also includes a servo driver, which is connected between the servo motor and the industrial computer.

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