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JPE, Vol. 18, No. 5, September 2018
Decoupled SVPWM for Five-Phase Permanent Magnet Machines with Trapezoidal Back-EMF
Zhipeng Lin, Guohai Liu, Wenxiang Zhao, and Qian Chen
Area Adjustable Speed Drives
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 Decoupled concept,Five-phase permanent magnet machine,Non-sinusoidal voltage,Space vector pulse-width modulation (SVPWM),Trapezoidal back-EMF
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