基于加权路径内点法的六相电机SVPWM四矢量调制方法

doi:10.19595/j.cnki.1000-6753.tces.171552

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Abstract In this paper, a four-vector modulation method based on Interior Point algorithm of weighted path is proposed for six-phase motor SVPWM, which can suppress the harmonic voltage of the dual Y shift 30° 6-phase motor and reduce the harmonic loss and operating noise. When the modulation degree is between 0.577 and 0.622, four adjacent maximum voltage vectors are selected for each sector of the fundamental plane. The turn-on time of the four vectors is taken as the optimal amount, the four vectors tracking the expected voltage vector in the fundamental plane is taken as a constraint, and the minimum voltage vector synthesized by the four vectors on the harmonic plane is the objective function. The optimal solution of the four adjacent vectors’ turn-on time is obtained by using the Interior Point algorithm of weighted path. The simulation results show that compared with the existing methods, the proposed method reduces the THD of phase voltage from 5% to 3.36% at the modulation of 0.6. The experimental results show that the THD of phase voltage decreases from 21.53% to 14.14%. The proposed method can effectively suppress the harmonic voltage of the inverter, and reduce the harmonic current and operating noise. Moreover, this method can extend to the multi-phase motor system to suppress the harmonic voltage and improve system performance.

Key words： Six-phase inverter harmonic voltage space vector pulse width modulation (SVPWM) interior point algorithm

Received: 12 November 2017 Published: 29 January 2019

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TM464

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	Huang Shoudao
	Zhao Li
	Zheng Jian
	Li Mengqiu
	Wu Gongping

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Huang Shoudao,Zhao Li,Zheng Jian等. Four-Vector Modulation Method for Six-Phase Motor SVPWM Based on Interior Point Algorithm of Weighted Path[J]. Transactions of China Electrotechnical Society, 2019, 34(2): 267-274.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171552 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I2/267

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