The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Reliability Improvement of H-Bridge Multi-level Inverter for Medium-Voltage & High-Power Induction Motor Drives

고전압 대용량 유도전동기 구동용 H-브릿지 멀티레벨 인버터의 신뢰성 향상

  • Park, Young-Min (Power Conversion Research Department, Hyundai Heavy Industries Co., LTD.) ;
  • Lee, Kwang-Hwan (Power Conversion Research Department, Hyundai Heavy Industries Co., LTD.) ;
  • Lee, Se-Hyun (Power Conversion Research Department, Hyundai Heavy Industries Co., LTD.)
  • Received : 2013.09.23
  • Accepted : 2013.11.25
  • Published : 2014.04.20
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Abstract

This paper proposes the reliability improvement of H-Bridge Multi-level (HBM) inverter. This reliability can be implemented through modularization of power circuit, distribution of controller, duplication of controller and communication, and continuous operation method in case of power cell failure for driving medium-voltage & high-power induction motor. It is shown that the modularization and expansion characteristics of the HBM inverter are improved since the individual inverter modules operate more independently when using the proposed concept. Also the fault tolerance is increased by using power cell bypass. The proposed design and control methods are described in detail and the validity of the proposed system is verified experimentally in various industrial fields.

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References

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