volume | PIER Journals

Abstract

An electric drive system is a core component of electric vehicles, and its electromagnetic compatibility (EMC) is critical to vehicle safety. Addressing the difficulty of locating electromagnetic interference (EMI) coupling paths via testing alone, this paper presents a simulation study of conducted EMI in motor drive systems. Parasitic parameters of key components are extracted through impedance testing and 3D electromagnetic simulation. Based on transmission line theory and impedance fitting, high-frequency equivalent models of each unit are developed and integrated into a system-level EMI simulation model. Validation shows that the model predicts conducted interference below 30 MHz accurately, with errors within 6 dB below 1 MHz and less than 10 dB in the 1 MHz-30 MHz band. This model enables rapid EMC troubleshooting and provides reliable simulation support for the forward design of electric vehicle drive systems.

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Dr. Tianhong Tan

Dr. Tao Jiang

Dr. Hui Ke