Cascaded H-Bridge 멀티레벨 인버터의 신뢰성 향상을 위한 고장 허용 제어

Abstract

In this paper, a novel fault-tolerant control method is proposed for three-phase Cascaded H-Bridge (CHB) inverters, based on overmodulation. Typically, conventional methods adjust the amplitude of reference signals, thereby restricting their performance to the linear modulation range. In contrast, the proposed method leverages overmodulation to extend this range. Additionally, being software-based, the proposed method eliminates the need for additional hardware efforts. The proposed method is verified through simulation and experiment considering a 7-level CHB converter.