A motor-terminal surge and induced EMI noise controlling method effective in EVs with the high density packaging structure

This paper describes a motor-terminal surge and induced EMI noise controlling method which is effective in electric vehicles (EVs) with the high density packaging structure. First, circuit parameters to influence surges occurring at the motor terminals when a motor is connected to a PWM inverter via short leads are clarified through transient circuit analyses and experiments. Then, a method to control surge voltages and induced EMI noise is proposed which uses a power board. The effectiveness of the proposed method is verified through simulations and experiments.