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

Zhipeng Lin; Guohai Liu; Wenxiang Zhao; Qian Chen

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

Vol. 18, No. 5, pp. 1424-1433, Sep. 2018

10.6113/JPE.2018.18.5.1424

Decoupled concept

Five-phase permanent magnet machine

Non-sinusoidal voltage

Space vector pulse-width modulation (SVPWM)

Trapezoidal back-EMF

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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 α1-β1 frame and the α3-β3 frame are decoupled. In the α1-β1 frame, the reference vector is comprised by near two large vectors. The corresponding vector comprised by the two vectors in the α3-β3 frame is considered as a disturbance, which is restrained by close-loop control. In the α3-β3 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 α1-β1 frame. The effectiveness of the proposed method is verified by simulated and experimental results under various operation conditions.

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Cite this article

[IEEE Style]

Z. Lin, G. Liu, W. Zhao, Q. Chen, "Decoupled SVPWM for Five-Phase Permanent Magnet Machines with Trapezoidal Back-EMF," Journal of Power Electronics, vol. 18, no. 5, pp. 1424-1433, 2018. DOI: 10.6113/JPE.2018.18.5.1424.

[ACM Style]

Zhipeng Lin, Guohai Liu, Wenxiang Zhao, and Qian Chen. 2018. Decoupled SVPWM for Five-Phase Permanent Magnet Machines with Trapezoidal Back-EMF. Journal of Power Electronics, 18, 5, (2018), 1424-1433. DOI: 10.6113/JPE.2018.18.5.1424.