Hub motor on-load EMC performance test system

Abstract

The invention relates to the technical field of electromagnetic compatibility tests, in particular to a hub motor on-load EMC performance test system. The system comprises a power source, a linear impedance stabilization network, a hub motor controller, a load exertion mechanism and a fixed device, wherein the power source controls a hub motor to rotate. A vehicle wheel where the hub motor is installed is connected with the fixed device through a shaft. The load exertion mechanism exerts loads on the contact surface of the vehicle wheel making contact with the load exertion mechanism, then hub motor on-load is achieved, meanwhile the fixed device is adjusted to control vertical loads of the vehicle wheel, and it is guaranteed that the vehicle wheel reliably makes contact with the load exertion mechanism. EMC performance of one signal hub motor and a hub motor system comprising the hub motor, the hub motor controller and a power cable can be tested, and the test result is not affected by the motor loads and is accurate and credible; in a general electromagnetic compatibility test environment which is already constructed and provided with a drum, a test environment which is expensive and special for motor electromagnetic compatibility does not need to be constructed, and therefore the cost for testing the hub motor is reduced.

Description

technical field [0001] The invention relates to the technical field of electromagnetic compatibility testing, in particular to an on-load EMC performance testing system for hub motors. Background technique [0002] Research on new energy vehicles is in full swing, among which electric vehicles are highly expected. The electric motor is the core drive component of an electric vehicle, and its role in an electric vehicle is equivalent to that of an engine in a conventional power vehicle. [0003] There are many schemes for the drive system of electric vehicles, and wheel drive is one of them. The wheel-side drive scheme means that each wheel is equipped with a motor to drive independently, and then the central controller coordinates all the tires of the vehicle according to the control strategy, so as to achieve the purpose of making all the tires of the vehicle work in harmony and make the vehicle run smoothly, safely and with high performance. [0004] Electric vehicles do...

AI Technical Summary

Problems solved by technology

[0008] 2. This scheme needs to open holes in the anechoic chamber, which seriously affects the performance of the anechoic chamber as a general test environment. Therefore, the adoption of this scheme requires the construction of a special radio anechoic chamber, which is extremely expensive

[0009] 3. This solution often needs to select different load motors for different motors under test, which will lead to higher investment in load motors by testing institutions

[0010] 4. When this scheme is adopted, the controllable and measurable parameters of the motor used as the test load and the control and test accuracy are directly linked to the technical difficulty and cost of the load motor, and the multi-working condition test of the hub motor is required, including acceleration and deceleration conditions The test needs to be equipped with multi-parameter, high-precision, real-time controllable and measurable load motors. Such high-standard load motors are difficult to purchase in the market due to technical difficulties. Even if they are available in the market, the test cost will be too high to be acceptable.

Images