Space Vector Pulse Width Modulation Strategy for Six-Phase Voltage Source Inverter in Full Modulation Range Based on Sector Subdivision Method

被引:0
|
作者
Huang, Shoudao [1 ]
Zhao, Li [1 ]
Zheng, Jian [2 ]
Zhao, Yunyun [1 ]
机构
[1] College of Electrical and Information Engineering, Hunan University, Changsha,410082, China
[2] College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou,412007, China
关键词
Electric inverters - Pulse width modulation - Voltage control - Harmonic analysis - Vector spaces;
D O I
10.19595/j.cnki.1000-6753.tces.181645
中图分类号
学科分类号
摘要
The space vector pulse width modulation (SVPWM) strategy for double-Y shift 30° six-phase inverter (VSI) based on 12-sector exists some problems, such as many switching times and asymmetrical voltage pulse waveform which is difficult for DSP implementation. To solve these problems, a 24-sector SVPWM strategy has been proposed in linear modulation region, but over-modulation region has not been involved. In this paper, a sector subdivision SVPWM strategy is proposed, which subdivides each sector of 24 sectors into five regions and realizes modulation in full range. When the modulation degree is between 0.5774 and 0.6221, an optimization model of harmonic voltage minimization is constructed. External point method is adopted to solve the optimization model, so that the harmonic voltage is effectively suppressed. Compared with the traditional 12-sector SVPWM method, the average value of the phase voltage total harmonic distortion (THD) is reduced by approximately 28%. When the modulation degree is between 0.622 1 and 0.636 6, optimization model for minimizing the difference of voltage amplitude is constructed, so that the fundamental amplitude of the synthesized phase voltage is slightly lower than the expected fundamental amplitude, but the method is simple and the amount of calculation is small. This method can be further extended to multi-phase motor systems to improve system performance. Through the simulation analysis and experimental verification, the correctness and practicability of the proposed method are demonstrated. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
引用
收藏
页码:5070 / 5083
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