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http://dx.doi.org/10.6113/JPE.2018.18.5.1424

Decoupled SVPWM for Five-Phase Permanent Magnet Machines with Trapezoidal Back-EMF  

Lin, Zhipeng (School of Electrical and Information Engineering, Jiangsu University)
Liu, Guohai (School of Electrical and Information Engineering, Jiangsu University)
Zhao, Wenxiang (School of Electrical and Information Engineering, Jiangsu University)
Chen, Qian (School of Electrical and Information Engineering, Jiangsu University)
Publication Information
Journal of Power Electronics / v.18, no.5, 2018 , pp. 1424-1433 More about this Journal
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 ${\alpha}_1-{\beta}_1$ frame and the ${\alpha}_3-{\beta}_3$ frame are decoupled. In the ${\alpha}_1-{\beta}_1$ frame, the reference vector is comprised by near two large vectors. The corresponding vector comprised by the two vectors in the ${\alpha}_3-{\beta}_3$ frame is considered as a disturbance, which is restrained by close-loop control. In the ${\alpha}_3-{\beta}_3$ 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 ${\alpha}_1-{\beta}_1$ frame. The effectiveness of the proposed method is verified by simulated and experimental results under various operation conditions.
Keywords
Decoupled concept; Five-phase permanent magnet machine; Non-sinusoidal voltage; Space vector pulse-width modulation (SVPWM); Trapezoidal back-EMF;
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