The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Novel Fault Detection Method using the PWM Characteristic at Open-Circuit Fault in NPC Inverter Systems

NPC 인버터 시스템에서 개방성 고장시 PWM 특성을 이용한 새로운 고장 검출 방법

  • 이정대 (한양대 공대 전기공학과) ;
  • 김태진 (한양대 공대 전기공학과) ;
  • 하동현 (한양대 공대 전기공학과) ;
  • 현동석 (한양대 공대 전기공학과)
  • Published : 2008.07.01
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Abstract

In this paper, a novel fault detection method is proposed when the neutral-point-clamped inverter has a open-circuit fault in the switching device. This proposed method is configured with simple circuit and is achieved by a simple algorithm using the inherent characteristic of the continuous Pulse Width Modulation. Also, this method has the fast fault detection ability and is much simpler to embody, in comparison with conventional fault detection methods. This ability to detect fault minimizes harmful effect which are such as DC-link voltage unbalance and overstress to other switching devices. Therefore, this proposed fault detection method can improve reliability of NPC inverter system. Experimental results are presented to verify the validity of proposed fault detection method.

Keywords

References

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