EMC performance testing system under motor on-load condition

Abstract

The invention discloses an EMC performance testing system under a motor on-load condition. The EMC performance testing system includes a darkroom, a drum, a drum motor, a power supply, a linear impedance stabilization network, a motor controller, a test bench and a wheel; the wheel contacts with the drum surface of the drum and drives the drum surface to rotate under the effect of the test bench, so that the drum motor can become as a load motor of a tested motor, and therefore, on-load testing of the tested motor can be realized; and the vertical load of the wheel can be controlled through adjusting a test bench fixing device, so that it can be ensured that the wheel reliably contacts with the drum surface of the drum. With the EMC performance testing system of the invention adopted, the EMC performance of a wheel hub motor, a single motor and a motor system including a motor, a motor controller and a power cable can be tested, and test results are accurate and reliable; in a constructed general electromagnetic compatibility test environment where drums exist, a special test environment for motor electromagnetic compatibility performance does not need to be constructed, and therefore, construction cost can be reduced; and for tested motors with different power levels in the power range of the drum motor, load motors do not need to be replaced, and therefore, load motor cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of electromagnetic compatibility testing, in particular to an EMC performance testing system under the load working condition of a motor. 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] Electric vehicles do not have problems such as fuel economy and engine mechanical properties like conventional vehicles, but because the motor needs to be driven by a large current, and there is a sharp current and voltage change in the system when the motor's working state changes, electromagnetic compatibility has become an influence on electric vehicles. A central issue in the safety of automotive electronic systems. [0004] The function of the motor is to d...

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Problems solved by technology

[0011] For the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to break through the traditional idea that a special darkroom must be built for the on-load EMC test of the electric vehicle drive motor through the special design of the test scheme; The problem that the electromagnetic disturbance of the load used for motor testing affects the test results of the under-load EMC performance of the motor under test; through a test bench that can realize power transfer, the drum motor can be used to load the drive motor of a non-hub motor electric vehicle; and through absorbing Influence of Wall Weakening Test Bench on Test Results

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