A Review on Conductive Common-Mode EMI Suppression Methods in Inverter Fed Motor Drives

Zeliang Zhang, Yihua Hu*, Xiao Chen, Geraint Wyn Jewell, Hong Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The impact of electromagnetic interference (EMI) is an increasingly important aspect of the performance of switching inverters. The challenges of managing EMI continue to grow with the emergence of wide bandgap (WBG) devices, the trend towards ever-greater integration and higher power rating. This paper reviews suppression methods for the conductive common-mode (CM) EMI in inverter fed motor drives. In order to span EMI suppression across the full system design process, the review considers both mitigation from the sources and suppression along the conduction paths. Furthermore, the shortcomings and merits of the reviewed publications are discussed, and their attenuation frequency range and attenuation level are compared. It is demonstrated that the CM EMI at low frequency is mainly determined by the PWM strategies and can be reduced or even theoretically eliminated through zero common-mode control. On the other hand, the CM EMI at high frequency is markedly influenced by the switching transients of the power devices. Thus, various drive circuits are reviewed which improve the switching behavior. Finally, the deployment of passive and active filters to suppress or compensate for the EMI is discussed.

Original languageEnglish
Article number9335577
Pages (from-to)18345-18360
Number of pages16
JournalIEEE Access
Publication statusPublished - 25 Jan 2021


  • Conductive EMI
  • EMI sources
  • inverter fed motor drives
  • propagation paths

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