Characterizing the generation & coupling mechanisms of electromagnetic interference noise from an electric vehicle traction drive up to microwave frequencies

Abstract

This paper proposes empirical strategies to characterize traditionally difficult electromagnetic compatibility (EMC) problems of power electronic motor drives, up to hundreds of MHz with high accuracy and providing better understanding to the root causes. Very simple concepts and block diagrams are used in this paper. Straightforward equations are then developed to predict or confirm important system-level features. By treating the noise sources and distribution paths separately, complicated EMC problems are conceptually divided into smaller and easier sub-issues, yielding more insightful perception and pave the road to better mitigation results. To confirm the proposed methodology, solid test results are shown in the paper, and followed by thorough discussions. Finally, a concise summary is appended to conclude this paper.