Low stray inductance bus bar design and construction for good EMC performance in power electronic circuits

TLDR

Research on electromagnetic compatibility has evolved over the past decade, addressing many design aspects of electrical equipment, yet new solutions to minimize EMI remain under investigation. The study aims to minimize EMI from power electronic circuits by designing inverter busbars that address interference at its source. The authors demonstrate that planar busbars can reduce EMI by integrating them into the inverter design. Measurements confirm that the implemented planar busbar design effectively validates the theoretical approach to EMI reduction.

Abstract

Ten years after the publication of the EC Directive 89/336, research and development related to electromagnetic compatibility have covered many aspects in the design and development of electrical and electronic equipment. Different solutions regarding these problems were presented in recent years, in order to minimize the electromagnetic interference, but new and innovative solutions are still being studied. In this paper, the authors show to what extent electromagnetic interference caused by power electronic circuits can be minimized with the use of planar busbars. Indeed, the goal is to tackle EMI directly at the source where most EMI is generated by proper design of the inverter busbars. A planar busbar design was made and implemented, Measurements show the validity of the theoretical approach.