Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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Cancellation of Common-Mode Voltages in Three-Level NPC Inverters with Auxiliary Leg

3-레벨 NPC 인버터에서 보조 레그를 이용한 공통 모드 전압 제거

  • Le, Quoe Anh (Department of Electrical Engineering, Yeungnam University) ;
  • Le, Dong-Choon (Department of Electrical Engineering, Yeungnam University)
  • Published : 2016.07.05
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Abstract

In this paper, a new active circuit for common-mode voltage (CMV) cancellation in three-level NPC (neutral-point clamped) inverters is proposed, which can avoid the saturation of the common-mode transformer (CMT). The proposed circuit utilizes an additional three-level leg to produce the compensating CMV of the NPC inverters, which eliminates the CMV of the inverter through the CMT.

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