仁安精密科技(海南)有限公司

EV Powertrain Test Solution

All our solutions for eV powertrain test

The following solutions are designed for electric vehicle powertrain testing. Each scheme has advantages and disadvantages, and users can choose according to actual testing needs. Among them, schemes 1 to 3 use motor loads, which are also applicable to the test of traction motors. Schemes 4 and 5 use inverters and reactor loads. The schemes are simpler and lower in cost, but have scope of application and difficulty in implementation.

For the driver, if it is used for type test and is biased towards reliability test, it is recommended to adopt scheme three; if it is only used for factory test, it is recommended to adopt scheme five.

Table of Contents

electric vehicle powertrain test asynchronous motor loading method (common DC bus scheme)

EV POWERTRAIN TEST SOLUTION 1

Introduction to the loading method scheme of the asynchronous motor for drive testing
This method is applicable to two drivers of the same model, the front end is powered by a convertible DC power supply, and the asynchronous motor coupling loading method is adopted. It is mostly used for temperature rise test at each frequency point, setting of protection parameters and performance analysis.

System functions
Rated load loading test, no-load test, constant torque starting test, etc.

System disadvantages of drive test scheme
There is no feed test function, and the performance of the driver is affected by the fluctuation of the DC voltage, resulting in fluctuations in the output torque or pulsating torque.

Electric vehicle powertrain test asynchronous motor loading method (common AC bus scheme)

EV POWERTRAIN TEST SOLUTION 2

Introduction to drive test scheme
This method adopts the method of adding AFE to the driver under test. The function of AFE rectification is to provide a convertible and stable DC power supply for the driver under test, and to return the energy generated by the driver to the grid for consumption by the load system when the driver is performing a feeding test. The load system uses ABB or other brands of four-quadrant inverters. It is used for the temperature rise test at each frequency point, the setting and performance analysis of protection parameters, and the reliability test in accordance with the national standard requirements can all be realized. The system adopts the common AC bus feedback scheme, which avoids the pulsating torque of the tested drive caused by the pulsating voltage generated when the feedback is loaded, thus affecting the performance analysis of the drive. This solution has fast torque response and high reliability.

System Functions
Rated load loading test, no-load test, constant torque start test, reliability test, etc.

System disadvantages of drive test scheme
The cost is high, which increases the cost of the load driver and cannot simulate the characteristics of the battery.

Electric vehicle drive test asynchronous motor loading method (common DC bus with DC power supply scheme)

Introduction to drive test scheme
Compared with the common AC bus feedback scheme, the advantage of this scheme is that it increases the DC/DC power supply and saves the load frequency converter (the user provides the same type of drive as the load drive instead). The pulsating voltage generated by the load during DC bus feedback has no effect on the tested drive. Moreover, the DC/DC power supply can simulate the characteristics of the battery, making the tested drive closer to the real use environment.

System Functions
Rated load loading test, no-load test, constant torque starting test, reliability test, etc.

System disadvantages of drive test scheme
This plan is a very ideal one, without obvious disadvantages.

Electric vehicle powertrain test dual drive loading method (common DC bus scheme)

EV POWERTRAIN TEST SOLUTION 4

Introduction to drive test scheme
This method is simpler than the loading method of asynchronous motors. It only needs to design a reactor with appropriate parameters. It is generally used for the factory test of the drive, suitable for the temperature rise test at various frequencies/voltages, and used for various factory protection parameters. The determination and module temperature rise test. The front end is designed as a DC stabilized power supply with convertible DC voltage to adapt to driver tests under various voltages.

System Function
Temperature rise test at each frequency/voltage, setting of current protection parameters and short circuit protection test

System disadvantages of drive test scheme
Since the loading system adopts the electrical coupling method and the output waveform of the driver is PWM output, it is difficult to implement the scheme (the working mode of the tested driver, carrier frequency, carrier synchronization control, and phase-locked loop should be considered, such as using a third-party It is difficult to load the driver), if two drivers of the same type are used, synchronous start and phase-locked loop must be considered, and the driver under test must work in V/F mode, otherwise the output frequency of the driver is changing, which cannot Lock its phase.

electric vehicle drive test single drive loading method (reactive short circuit method)

EV POWERTRAIN TEST SOLUTION

Introduction to drive test scheme
This method has a simple structure, and only needs to design a matching reactance suitable for various types of drives. It is generally used for the factory test of the frequency converter, the rated current test of the drive, and the measurement of various protection parameters of the drive and the measurement of the complete machine. Temperature rise test. The front end is designed as a DC stabilized power supply with convertible DC voltage to adapt to driver tests under various voltages.

System function
Temperature rise test under rated current, determination of short circuit protection parameters.

System disadvantages of drive test scheme
The test is only limited to a certain voltage. Due to the limitation of reactance short circuit, the output voltage generally cannot be too high. It is mostly used as test equipment for factory inspection lines. If the V/F curve of the driver is opened, the rated current test at different frequency points can be used, otherwise it can only be used for the rated current test at low frequency and low voltage

Sensors and Testers from renan precision for EV powertrain test solutions

PS power sensor, energy sensors high precision, low voltage, high current
RAPS High Precision Power Sensor
RAPA600 Power Analyzer
RAPA High Performance Power Analyzer

Contact With Our Experts

    1. 名字

    2. 电话号码

    3. Email

    4. 公司

    5. 消息


    * 必填

    en_USEnglish