Abstract：The high frequency common-mode voltage producing by the PWM inverter can induce high-amplitude voltage on shaft of the motor. And the voltage on the shaft can generate shaft current that may shorten the life of the motor. In this paper, take the source of voltage PWM inverter for example, beginning with the mechanism of the common-mode voltage, it is found that the common- mode voltage is consisted by a series specific harmonics. According to the forward mentioned, a new control strategy that using the quasi-resonant controller for suppressing the common-mode voltage is proposed. Because of the giant at the resonant frequency is infinity, it can realize zero steady-state error control for the sinusoidal signal with the same frequency. So connecting the resonant controller to the conventional PI controller, focusing on the high-amplitude part of the common-mode in order to suppression the common-mode voltage. Simulation and experiment results verify the effectiveness of the proposed strategy.
[1] 王久和. 电压型PWM整流器的非线性控制[M]. 北京: 机械工业出版社, 2008. [2] Rizzo S, Xiao Y, Zargari N. Medium voltage drive review[C]. PCIM Power Electronics Conf. , 2000: 182-195. [3] Hammond P W. A new approach to enhanced power quality for medium voltage drives[J]. IEEE Trans. IA, 1997, 33(1): 202-208. [4] Julian A, et al. Elimination of common-mode voltage in three-phase sinusoidal power converters[J]. IEEE Trans. on Power Electronics, 1999, 14(5): 982-989. [5] Kim Lee Hum, Park Hyun Seok, Jeong Gil. A new switching technique for conducted EMI reduction of PWM-inverter AC motor drive system[C]. ICMIT, 2003: 150-156. [6] 姜艳姝, 刘宇, 徐殿国, 等. PWM变频器输出共模电压及其抑制技术的研究[J]. 中国电机工程学报2005, 25(9): 47-53. Jiang Yanshu, Liu Yu, Xu Dianguo, et al. Reserch on commom-mode voltage generated by a PWM inverter and its cancellation technology[J]. Proceedings of the CSEE, 2005, 25(9): 47-53. [7] Grahame D Holmes, Thromas A Lipo. Pulse width modulation for power converters;principles and practice[M]. New York: Wiley Publishing, Inc., 2003. [8] 肖磊, 黄守道, 黄科元, 等. 直驱永磁同步风力发电机机侧变流器谐波抑制[J]. 中国电机工程学报, 2011, 31(6): 31-37. Xiao Lei, Huang Shoudao, Huang Keyuan, et al. Harmonic suppression for the motor-side converter of the directly-driven wind turbine with PM synchronous generator[J]. Proceedings of the CSEE, 2011, 31(6): 31-37. [9] 杨秋霞, 梁雄国, 郭小强, 等. 准谐振控制器在有源电力滤波器中的应用[J], 电工技术学报, 2009, 24(7): 171-176. Yang Qiuxia, Liang Xiongguo, Guo Xiaoqiang, et al. Application of quasi resonant controller for active power filter[J]. Transactions of China Electrotechnical Society, 2009, 24(7): 171-176. [10] 黄沁, 李耀华. 一种新颖的含有谐振控制器的CVCF逆变器多环反馈控制方法[J]. 电工电能新技术, 2004, 24(2): 37-40. Huang Qin, Li Yaohua. A novel multi-loop control method with resonant controller for CVCF inverter[J]. Advanced of Technology of Electrical Engineering and Energy, 2004, 24(2): 37-40.
2013, Vol. 28 
