Hyun-Woo Sim, “비대칭 영전압 스위칭 상태를 이용한 다단 H-브릿지 멀티레벨 인버터의 개방성 스위치 고장 진단 방법,” 아주대학교 공학석사 학위 논문, 2014. > Paper

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Thesis Hyun-Woo Sim, “비대칭 영전압 스위칭 상태를 이용한 다단 H-브릿지 멀티레벨 인버터의 개방성 스위치 고장 진단 방법,” 아주대학교 공학석사 학위 논문, 2014.

2014

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This paper presents a detection method for an open-switch fault in cascaded H-bridge multilevel inverters. Recently, cascaded H-

bridge multilevel inverters (CHMIs) are widely used in high power systems. Therefore, the reliability of this topology has become an

important factor. To improve the reliability, detecting methods for an open-switch fault are required. The proposed method is based

on the current path analysis according to zero-voltage switching states. The location of both faulty cells switches can be detected

by the current waveform and zero-voltage switching states. This method is applicable when using the level-shifted PWM that is

commonly used for a modulation method in CHMIs. The performance of proposed detecting method is verified by simulation and

experimental results.

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