Modeling of Conducted EMI in Motor Drive System Based on Double Pulse Test and Impedance Measurement

Power electronic devices in high-power motor drive system will generate high-frequency electromagnetic interference (EMI). In this paper, a modeling method of conducted EMI in motor drive system is studied. Based on datasheet and double pulse test, the static and dynamic characteristics of IGBT are obtained, and the behavior model of IGBT is established. The high-frequency impedance model of filter reactor is established by genetic algorithm. The model of induction motor is established by vector fitting method. The conducted EMI circuit model of motor drive system is established on the simulation platform, and the simulated result of model fits well with the measured result.