High frequency Lumped parameter model for EMI Problems and over voltage Analysis of induction motor

Abstract

In this paper a novel high frequency lumped model of Induction motor is presented that is suitable for prediction of terminal over voltage analysis and Electromagnetic Interference (EMI) problems and common mode (CM) current. The parameters of the proposed model are defined by asymptotical method using differential and common mode impedance measurements. This proposed model also can be used to predict and solve the high frequency problems and designing EMI filters to improve Electromagnetic Compatibility (EMC) limitation in cable fed motor-drive system. The proposed model considered accurate simulation of both differential and common mode behavior in the EMI-frequency range from 100 Hz to 30MHz. This model has been validated by differential mode (DM) and common mode (CM) test measurements in both magnitude and phase which measurement have been done using an impedance analyzer. There is a very good accordance between the experimental results and simulation results of the proposed model in both magnitude and phase.