Abstract：Due to the common voltage generated by converters and the triple frequency harmonic component of back EMF, the zero sequence current will be produced when the open winding permanent magnet synchronous motor (PMSM) is supplied by a single DC bus, which will reduce the efficiency and operation stability. In this paper, a zero sequence current suppression strategy is proposed for the open winding PMSM system with one common DC bus. Based on the mathematical model of open winding PMSM and zero sequence circuit, the common voltage is generated by two converters to counteract the triple frequency harmonic component of back EMF, and then the zero sequence current can be eliminated. Furthermore, the modulation capability and maximum modulation index of the proposed zero sequence current suppression and the traditional common voltage suppression is analyzed and compared. Finally, the experimental system of open winding PMSM system is developed to validate the availability of the proposed zero sequence current suppression strategy.
年珩,曾恒力,周义杰. 共直流母线开绕组永磁同步电机系统零序电流抑制策略[J]. 电工技术学报, 2015, 30(20): 40-48.
Nian Heng, Zeng Hengli, Zhou Yijie. Zero Sequence Current Suppression Strategy for Open Winding Permanent Magnet Synchronous Motor with Common DC Bus. Transactions of China Electrotechnical Society, 2015, 30(20): 40-48.
[1] 诸自强. 永磁电机研究的新进展[J]. 电工技术学报, 2012, 27(3): 1-11. Zhu Ziqiang. Recent advances on permanent magnet machines[J]. Transactions of China Electrotechnical Society, 2012, 27(3): 1-11. [2] 王凤翔. 永磁电机在风力发电系统中的应用及其发展趋向[J]. 电工技术学报, 2012, 27(3): 12-24. Wang Fengxiang. Application and development ten- dency of PM machine in wind power generation system[J]. Transactions of China Electrotechnical Society, 2012, 27(3): 12-24. [3] Stemmler H, Guggenbach P. Configurations of high power voltage source inverter drives[C]. Fifth European Conference on Power Electronics and Applications, 1993: 7-14. [4] Kawabata T, Ejiogu E C, Kawabata Y, et al. New open-winding configurations for high-power inverters[C]. Proceedings of the IEEE International Symposium on Industrial Electronics, 1997: 457-462. [5] 年珩, 周义杰, 李嘉文. 基于开绕组结构的永磁风力发电机控制策略[J]. 电机与控制学报, 2013, 17(4): 79-85. Nian Heng, Zhou Yijie, Li Jiawen. Control strategy of permanent magnet wind generator based on open winding configuration[J]. Electric Machines and Control, 2013, 17(4): 79-85. [6] Shivakumar E G, Gopakumar K, Sinha S K, et al. Space vector PWM control of dual inverter fed open- end winding induction motor drive[C]. Applied Power Electronics Conference and Exposition, 2001: 399-405. [7] Somasekhar V T, Gopakumar K, Pittet A, et al. A novel PWM inverter switching strategy for a dual two-level inverter fed open-end winding induction motor drive[C]. 4th IEEE International Conference on Power Electronics and Drive Systems, 2001: 196-202. [8] Somasekhar V T, Gopakumar K, Baiju M R. Dual two-level inverter scheme for an open-end winding induction motor drive with a single DC power supply and improved DC bus utilization[J]. IEE Proceedings Electric Power Applications, 2004, 151(2): 230-238. [9] Somasekhar V T, Gopakumar K, Shivakumar E G, et al. A space vector modulation scheme for a dual two level inverter fed open-end winding induction motor drive for the elimination of zero sequence currents[J]. EPE Journal, 2002, 12(2): 26-36. [10] Somasekhar V T, Srinivas S, Prakash R B, et al. Pulse width-modulated switching strategy for the dynamic balancing of zero-sequence current for a dual-inverter fed open-end winding induction motor drive[J]. IET Electric Power Applications, 2007, 1(4): 591-600. [11] Oleschuk V, Sizov A, Bose B K, et al. Phase-shift- based synchronous modulation of dual inverters for an open-end winding motor drive with elimination of zero sequence currents[C]. International Conference on Power Electronics and Drives Systems, 2006: 325-330. [12] Somasekhar V T, Srinivas S, Kumar K K. Effect of zero-vector placement in a dual-inverter fed open-end winding induction-motor drive with a decoupled space-vector PWM strategy[J]. IEEE Transactions on Industrial Electronics, 2008, 55(6): 2497-2505. [13] Somasekhar V T, Srinivas S, Gopakumar K. A space vector based PWM switching scheme for the reduction of common-mode voltages for a dual inverter fed open-end winding induction motor drive[C]. Power Electronics Specialists Conference, 2005: 816-821. [14] Wang Y, Panda D, Lipo T, et al. Open-winding power conversion systems fed by half-controlled converters[J]. IEEE Transactions on Power Electronics, 2013, 28(5): 2427-2436. [15] Silva M S, Lopes B M, Filho B J C, et al. Performance evaluation of PLL algorithms for single-phase grid- connected systems[C]. Industry Applications Conference, 2004: 2259-2263. [16] 宋文祥, 艾芊, 云伟俊, 等. 基于矢量分区的三电平SVPWM模式零序分量分析[J]. 电工技术学报, 2009, 24(12): 102-108. Song Wenxiang, Ai Qian, Yun Weijun, et al. Zero- sequence signal of space vector modulation for three- level neutral-point-clamped inverter based on vector diagram partition[J]. Transactions of China Electrotech- nical Society, 2009, 24(12): 102-108.
2015, Vol. 30 
