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Decoupled SVPWM for Five-Phase Permanent Magnet Machines with Trapezoidal Back-EMF
Zhipeng Lin, Guohai Liu, Wenxiang Zhao, and Qian Chen
Abstract This paper presents a novel space vector pulse-width modulation (SVPWM) to synthesize an arbitrary non-sinusoidal phase voltage. The key of the proposed method is that the switching vectors used to comprise the reference vectors in the メ1-モ1 frame and the メ3-モ3 frame are decoupled. In the メ1-モ1 frame, the reference vector is comprised by near two large vectors. The corresponding vector comprised by the two vectors in the メ3-モ3 frame is considered as a disturbance, which is restrained by close-loop control. In the メ3-モ3 frame, there are two methods to comprise the reference vector. Method I is a near two middle vectors method. Method II uses near four vectors (two middle and two little vectors). The proposed SVPWM using decoupled switching vectors can guarantee a maximum modulation index in the メ1-モ1 frame. The effectiveness of the proposed method is verified by simulated and experimental results under various operation conditions.
Keyword Space vector pulse-width modulation (SVPWM), Five-phase permanent magnet machine, Decoupled concept, Trapezoidal back-EMF, Non-sinusoidal voltage
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