Sichuan Chengbang Haoran Measurement and Control Technology Co., Ltd.
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AT4000—In-wheel motor test system

Case Presentation

  AT4000—In-wheel motor test system—Product background


  New energy vehicles use distributed drives and use hub motors as drive units. Electric bicycles and electric motorcycles in the market use hub motors as drive units. The product development and factory inspection of hub motors must ensure product performance and product quality. Strict testing and analysis of its performance is particularly important. This system is based on the national standard GB/T 18488.1-2015 "Electric Vehicle Motors and Controllers Part One Technical Conditions" GB/T 18488.2-2015 "Electric Vehicle Motors and Controllers Part Two Test Methods" and refer to other national standard requirements In accordance with various motor test standards, type verification tests are carried out on motor test purposes, test procedures and test methods.


Bench picture


  Reference standard:

  ●GB/T 18488.1-2015 "Electric Vehicle Motors and Controllers Part One Technical Conditions"

  ●GB/T 18488.2-2015 "Electric Vehicle Motors and Controllers Part II Test Methods"

  ●GB/T 18385-2005 "Electric Vehicle Power Performance Test Method"

  ●GB/T 18386-2005 "Electric Vehicle Energy Consumption Rate and Driving Range Test Method"

  ●GB/T 755-2008 "Rating and performance test methods for rotating electrical machines"

  ●GB/T 29307-2012 "Reliability Test Method of Drive Motor System for Electric Vehicles"

  ●GB/T 22669-2008 "Three-phase permanent magnet synchronous motor test method"

  ●GB/T 1032-2005 "Three-phase asynchronous motor test method"

  ●GB/T 50054-95 "Code for Low Voltage Power Distribution Design"

  ●GB/T 50055-93 "General Electric Equipment Power Distribution Design Code"

  ●Mechanical manufacturing system according to GB9061-85

  ●Electrical system according to GB5226-85

  AT4000—In-wheel motor test system—Topological structure

  AT4000—In-wheel motor test system adopts modular and integrated design, the operating part is ergonomically designed, and can complete manual/automatic mode control. It consists of three parts: mechanical system, electrical system, and system software.

  ●Mechanical system: Integral platform + test stand and other equipment.

  ●Electrical system: two-way DC power supply, drive controller, hub motor, sensors (torque, speed, voltage, current) real-time data acquisition system, data acquisition, alarm system and other equipment.

  ●System software: The upper computer test software is divided into data acquisition communication module, data acquisition setting module, data real-time exchange control module, and data processing module according to the system. The upper computer completes the functions of test control, data analysis and display, data recording and export according to the test items.

  AT4000—In-wheel motor test system—System function

  Basic range and accuracy:

  Suitable for all kinds of hub motors (non-standard design can be made according to specific parameters)

  1 Test items:

  Locked rotor test, load test, no-load test, temperature rise test, load characteristic test, efficiency characteristic test (torque-speed characteristic), no-load loss of drive motor, steady-state short-circuit current limit, overspeed test, reliability test (Durability test) Short-term increased voltage test, electric operating conditions, power generation conditions, efficiency MAP diagrams, etc.

  AT4000—Wheel Motor Test System—Main Features

  01 Functional modularity

  All the benches are built using functional modularity, and are combined into one test system in the form of a combination of modules. Customers can add or remove test modules according to different test objects.

  02 Advanced measurement methods

  Adopt advanced real-time measurement and control system, including input electrical parameter test, speed and torque test, etc., high torque and speed sampling rate, meet the high precision and fast response requirements of the test system, and provide transient data and characteristic value data to facilitate the software's later test process The data is fully analyzed.

  03 Complete test items

  According to the test requirements specified in the national standard, test items can be added or removed according to the configuration module, which can meet the test items for various types of tests

  04 Motor load

  Using asynchronous motor/permanent magnet motor as the test motor load, changing the traditional load mode, improving the system's dynamic measurement range and accuracy of torque and speed, improving the loading performance (forward/reverse, reverse drag), and shortening the load response Time, can realize the loading of any load curve, highly simulating the real-time operating conditions of the motor/drive.

  05Environmental simulation equipment

  Using compressor refrigeration and heating mode as the test piece environmental simulation equipment and temperature control system, the high temperature, low temperature, high humidity, low humidity environment of the test piece is simulated, which shortens the aging durability test time of the test piece, thereby increasing The entire R&D efficiency reduces the R&D cycle.

  06Humanized design

  The professional motor test bench is adopted. The fixture has three-dimensional adjustment function, and is convenient for loading and unloading and adjustment of coaxiality. It can be adapted to the installation of the tested motor of any shape. The system operation adopts the piano table / cabinet + computer desk control mode, which can complete the order The location completes the layout of all test operations.

  07 Customized testing software

  The motor test system test software developed by the Sichuan Chengbang Software R&D team, according to the national standard requirements test items, classifies the software interface and process, reduces repeated tests, and greatly improves the work efficiency of testers. And it has the functions of real-time curve drawing, transient value capture, trend curve drawing and analysis, multi-parameter combination display, qualified judgment, report export and so on.

  AT4000—Wheel Motor Test System—Main Application

  ●E-bike hub motor

  ●Electric motorcycle hub motor

  ●Electric vehicle hub motor

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