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
Abstract：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.
黄守道, 赵礼, 郑剑, 赵云云. 基于扇区细分六相电压源逆变器全调制范围的空间矢量脉宽调制方法[J]. 电工技术学报, 2019, 34(24): 5070-5083.
Huang Shoudao, Zhao Li, Zheng Jian, Zhao Yunyun. Space Vector Pulse Width Modulation Strategy for Six-Phase Voltage Source Inverter in Full Modulation Range Based on Sector Subdivision Method. Transactions of China Electrotechnical Society, 2019, 34(24): 5070-5083.
[1] Levi E.Advances in converter control and innovative exploitation of additional degrees of freedom for multiphase machines[J]. IEEE Transactions on Indu- strial Electronics, 2016, 63(1): 433-448. [2] Levi E.Multiphase electric machines for variable- speed applications[J]. IEEE Transactions on Industrial Electronics, 2008, 55(5): 120-128. [3] 薛山, 温旭辉. 一种新颖的多相SVPWM[J]. 电工技术学报, 2006, 21(2): 68-72. Xue Shan, Wen Xuhui.Novel multiphase SVPWM[J]. Transactions of China Electrotechnical Society, 2006, 21(2): 68-72. [4] 袁飞雄, 黄声华, 龙文枫. 六相永磁同步电机谐波电流抑制技术[J]. 电工技术学, 2011, 26(9): 31-36. Yuan Feixiong, Huang Shenghua, Long Wenfeng.Techniques to restrain harmonics of six-phase permanent magnet synchronous motors[J]. Transa- ctions of China Electrotechnical Society, 2011, 26(9): 31-36. [5] Kianinezhad R, Mobarakeh B N, Baghli L, et al.Torque ripple suppression for six-phase induction motors under open phase faults[C]//IECON 32nd Annual Conference on IEEE Industrial Electronics, Paris, France, 2006: 1363-1368. [6] Mengoni M, Zarri L, Tani A, et al.High torque- density control of multiphase induction motor drives operating over a wide speed range[J]. IEEE Transactions on Industrial Electronics, 2015, 62(2): 814-825. [7] Iqbal A, Moinuddin S.Comprehensive relationship between carrier based PWM and space vector PWM in a five-phase VSI[J]. IEEE Transactions on Power Electronics, 2009, 24(10): 2379-2390. [8] Nelson R H, Krause P C.Induction machine analysis for arbitrary displacement between multiple winding sets[J]. IEEE Transactions on Power Apparatus and Systems, 1974, 93(3): 841-848. [9] Dujic D, Jones M, Levi E.Analysis of output current- ripple RMS in multiphase drives using polygon approach[J]. IEEE Transactions on Power Electronics, 2010, 25(7): 1838-1849. [10] Gonzalo Carrasco, César A Silva.Space vector PWM method for five-phase two-level VSI with minimum harmonic injection in the overmodulation region[J]. IEEE Transactions on Industrial Electronics, 2013, 60(5): 2042-2053. [11] Yazdani D, Khajehoddin S A, Bakhshai A.A generalized space vector classification technique for six-phase inverters[C]//Power Electronics Specialists Conference, Hong Kong, 2007: 2050-2054. [12] Grandi G, Serra G, Tani A.Space vector modulation of a six-phase VSI based on three-phase decom- position[C]//International Symposium on Power Electronics, Electrical Drives, Automation and Motion, Ischia, Italy, 2008: 674-679. [13] Zhao Y, Lipo T A.Space vector PWM control of dual three-phase induction machine using vector space decomposition[J]. IEEE Transactions on Industry Applications, 1995, 31(5): 1100-1108. [14] Gopakumar K, Ranganathan V T, Bhat. Split-phase induction motor operation from PWM voltage source inverter[J]. IEEE Transactions on Industry Appli- cations, 1993, 29(5): 927-932. [15] Hadiouche D, Baghli L, Rezzoug A.Space-vector PWM techniques for dual three-phase AC machine: analysis, performance evaluation, and DSP imple- mentation[J]. Transactions on Industry Applications, 2006, 42(4): 1112-1122. [16] 杨金波, 杨贵杰, 李铁才. 六相电压源逆变器PWM算法[J]. 电工技术学报, 2012, 27(7): 205-211. Yang Jinbo, Yang Guijie, Li Tiecai.PWM techniques for six-phase voltage-source inverters[J]. Transa- ctions of China Electrotechnical Society,2012, 27(7): 205-211. [17] 孟超, 欧阳红林, 刘伟候, 等. 双Y移30°永磁同步电机的空间矢量调制[J]. 中国电机工程学报, 2010, 30(3): 90-98. Meng Chao, Ouyang Honglin, Liu Weihou,et al.Space-vector PWM techniques for dual Y shift 30 degree permanent-magnet synchronous motor[J]. Proceedings of the CSEE, 2010, 30(3): 90-98. [18] Khoudir Marouani, Lotfi Baghli, Djafar Hadiouche, et al.A new PWM strategy based on a 24-sector vector space decomposition for a six-phase VSI-fed dual stator induction motor[J]. IEEE Transactions on Industrial Electronics, 2008, 55(5): 1910-1920. [19] 周长攀, 苏健勇, 杨贵杰. 双三相永磁同步电机全调制比范围空间矢量脉宽调制[J]. 电工技术学报, 2015, 30(10): 90-100. Zhou Changpan, Su Jianyong, Yang Guijie.The SVPWM strategy in full modulation region for dual three-phase PMSM[J]. Transactions of China Electro- technical Society, 2015, 30(10): 90-100. [20] 陈宝林. 最优化理论与算法[M]. 北京: 清华大学出版社, 2005.
2019, Vol. 34 
