AT4000—NVH test system for new energy vehicle motors

　　AT4000—NVH Test System for New Energy Automobile Motor—Product Background

　　Overview:

　　New energy vehicle motors are increasingly widely used in passenger cars, commercial vehicles, logistics vehicles, and heavy trucks in the automotive industry. The motor must ensure product performance and product quality in product development and factory inspection, so the performance of the motor is strictly The test 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, the motor NVH development verification test, benchmarking test and other verification tests are carried out.

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"

　　●GB6882-2008 "Acoustics, Determination of Sound Power Level of Noise Sources Semi-anechoic Chamber and Semi-anechoic Chamber Precision Method"

　　●ISO03745 "Acoustics, Determination of Sound Power Level of Noise Sources, Semi-anechoic Chamber and Semi-anechoic Chamber Precision Method"

　　●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—NVH Test System for New Energy Vehicle Motor—Topological Structure

　　AT4000—NVH test system of new energy vehicle motor adopts modular and integrated design. The operating part is ergonomically designed and can complete manual/automatic mode control. It is composed of three parts: sound insulation system, mechanical system, simulation guarantee system, electrical system and upper computer software system.

　　●Sound insulation system: composed of semi-anechoic room, through-wall soundproof cover, soundproof door, soundproof window, etc.

　　●Mechanical system: it consists of cast iron platform, loading equipment, tooling of the tested part, shaft connection part and other equipment.

　　●Simulation guarantee system: temperature control system and other equipment components.

　　●Electrical system: two-way DC power supply, load control, sensors (torque, speed, current, voltage, vibration, temperature) real-time data acquisition system, data acquisition, current sensor acquisition, electrical parameter measurement equipment, NVH vibration, noise and other measurement equipment , Alarm system and other equipment.

　　●Software system: 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—NVH Test System for New Energy Vehicle Motor—System Function

　　The basic scope and accuracy of NVH bench test for passenger car motors:

　　●Recommended power range: 0~300KW power level, support other customization of other power, speed and torque levels;

　　●Recommended speed measurement range: 0~15000~20000 r/min;

　　●Recommended torque measurement range: 0~500N.m;

　　●Recommended test voltage level: DC: 0~800~1200V;

　　●Voltage/current measurement accuracy: ±0.01% of reading + ±0.03% of range;

　　●Measurement accuracy of basic electric power: ±0.03%;

　　●Speed ​​measurement accuracy: ±1r/min;

　　●Torque measurement accuracy: ±0.05%F.S;

　　●NVH test parameters: acceleration, speed, noise, order, etc.

　　The basic scope and accuracy of NVH bench test for commercial vehicle motors:

　　●Recommended power range: 0~400~500KW power level, support other customization of other power, speed and torque levels;

　　●Recommended speed measurement range: 0~3300~4500 r/min;

　　●Recommended torque measurement range: 0~3000~3700N.m;

　　●Recommended test voltage level: DC: 0~800~1200V;

　　●Voltage/current measurement accuracy: ±0.01% of reading + ±0.03% of range;

　　●Measurement accuracy of basic electric power: ±0.03%;

　　●Speed ​​measurement accuracy: ±1r/min;

　　●Torque measurement accuracy: ±0.05%F.S;

　　●NVH test parameters: acceleration, speed, noise, order, etc.

　　The basic scope and accuracy of NVH bench test of logistics vehicle motor:

　　●Recommended power range: 0~200KW power level, support other customization of other power, speed and torque levels;

　　●Recommended speed measurement range: 0~6000~10000 r/min;

　　●Recommended torque measurement range: 0~1000~1500N.m;

　　●Recommended test voltage level: DC: 0~800~1200V;

　　●Voltage/current measurement accuracy: ±0.01% of reading + ±0.03% of range;

　　●Measurement accuracy of basic electric power: ±0.03%;

　　●Speed ​​measurement accuracy: ±1r/min;

　　●Torque measurement accuracy: ±0.05%F.S;

　　●NVH test parameters: acceleration, speed, noise, order, etc.

　　The basic scope and accuracy of NVH bench test for heavy-duty truck motors:

　　●Recommended power range: 0~500~800KW power level, support other customization of other power, speed and torque levels;

　　●Recommended speed measurement range: 0~2800 r/min;

　　●Recommended torque measurement range: 0~10000N.m;

　　●Recommended test voltage level: DC: 0~800~1200V;

　　●Voltage/current measurement accuracy: ±0.01% of reading + ±0.03% of range;

　　●Measurement accuracy of basic electric power: ±0.03%;

　　●Speed ​​measurement accuracy: ±1r/min;

　　●Torque measurement accuracy: ±0.05%F.S;

　　●NVH test parameters: acceleration, speed, noise, order, etc.

　　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, steady-state NVH test of efficiency MAP diagram, acceleration and deceleration NVH test, noise source identification sound contribution, three-dimensional sound field analysis, sound quality evaluation, sound power, Sound pressure level test, howling, order analysis, frequency domain analysis, octave analysis, etc.

　　AT4000—NVH Test System for New Energy Vehicle Motor—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 measuring equipment, including input electric parameter test, speed torque test, NVH test equipment, soundproof room, etc. Torque, rotational speed, vibration, noise, etc. adopt high sampling to meet the high precision and fast response requirements of the test system, and provide transient data and characteristic value data to facilitate the comprehensive analysis of the test process data in the later stage of the software.

　　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.

　　05Humanized design

　　The professional motor test bench is adopted. The fixture has a quick docking function, and it is easy to load and unload to adapt to the installation of different tested motors. The system operation adopts the piano table / cabinet + computer table control mode, which can complete the entire test operation layout in a single position.

　　06 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—NVH test system for new energy vehicle motors—main application

　　●Passenger car drive motor and control system

　　●Commercial vehicle drive motor and control system

　　●Logistics vehicle drive motor and control system

　　●Heavy truck drive motor and control system