Analysis on an Electromagnetic Compatibility Engineering Trouble Shooting Case of Electric Vehicle

In the situation that an electric vehicle tested in accordance with GB/T 18387–2017 and GB 14023–2011 but not meets the requirements of the standards, the motor controller (PMU) and air conditioning compressor (ACCM) are proved to be the main electromagnetic disturbance sources according to the scientific elimination method. The mechanism of electromagnetic disturbance is also analyzed and studied. Considering the key factors affecting mass production of vehicles, an engineering optimization solution is proposed to enable radiation emission of the electric vehicles meet the requirements of national standards.