Analysis of Noise Interference Prediction Methods of Electric Drive System Under Different Conditions

Since the conduction and radiation noise of the motor drive system of electric vehicles can affect such as the vehicle communication antenna and other on-board electronic equipment, countries around the world have limited the electromagnetic interference noise level of electric vehicles (such as CISPR25). Based on the finite element simulation of electromagnetic field, two methods for predicting the radiated noise of the machine table under different conditions are analyzed and compared in this paper. The main difference between the two methods is that the common mode current return path is different under different environmental conditions.