Abstract：The brushless DC motor (BLDCM) servo systems have been widely used in industry applications. But the torque ripple limits the using range of the BLDCM in high precision conditions. This paper propose a novel hybrid PWM control method based on current feedback to reduce the torque ripple in BLDCM with non-ideal back-EMF. The reference current used to produce the target torque is obtained through back-EMF observer, and the proposed control method realizes the torque direct control. Two different PWM control strategies are used to suppress the commutation torque ripple at high and low speeds. The system with the proposed method has the features of low torque ripple and large torque output. Simulation and experimental are set up with Matlab/Simulink to prove the torque control and compare torque ripple. Simulation and experiment results show the proposed method can significantly eliminate the torque ripple and enhance the accuracy of position control for servo system.
夏鲲, 董斌, 卢晶. 一种基于电流反馈的分段式PWM控制无刷直流电机转矩波动抑制方法[J]. 电工技术学报, 2017, 32(17): 172-179.
Xia Kun, Dong Bin, Lu Jing. Research on Hybrid PWM Control Method with Current Feedback for Torque-Ripple Reduction in BLDCM. Transactions of China Electrotechnical Society, 2017, 32(17): 172-179.
[1] 夏长亮, 方红伟. 永磁无刷直流电机及其控制[J]. 电工技术学报, 2012, 27(3): 25-34. Xia Changliang, Fang Hongwei. Permanent-magnet brushless DC motor and its control[J]. Transactions of China Electrotechnical Society, 2012, 27(3): 25-34. [2] 曾庆初. 永磁无刷直流电机噪声分析及降噪设计方法的研究[D]. 哈尔滨：哈尔滨工业大学,2009. [3] Zeroug H, Boukais B, Sahraoui H. Analysis of torque ripple in a BLDCM[J]. IEEE Transactions on Magnetics, 2002, 38(2): 1293-1296. [4] 夏鲲, 朱琳玲, 曾彦能, 等. 基于准Z源网络的永磁无刷直流电机换相转矩脉动抑制方法[J]. 中国电机工程学报, 2015, 35(4): 971-978. Xia Kun, Zhu Linling, Zeng Yanneng, et al. Researches on the method of suppressing commutation torque ripple for brushless DC motors based on a quasi-Z-source net[J]. Proceedings of the CSEE, 2015, 35(4): 971-978. [5] Niasar A H, Vahedi A, Moghbelli H. Analysis and control of commutation torque ripple in four-switch, three-phase brushless DC motor drive[C]//IEEE International Conference on Industrial Technology, Mumbai, 2006: 239-246. [6] Shi Jian, Li Tiecai. New method to eliminate commutation torque ripple of brushless DC motor with minimum commutation time[J]. IEEE Transactions on Industrial Electronics, 2013, 60(6): 2139-2146. [7] 王大方, 卜德明, 朱成, 等. 一种减小无刷直流电机换相转矩脉动的调制方法[J]. 电工技术学报, 2014, 29(5): 160-166. Wang Dafang, Bu Deming, Zhu Cheng, et al. A modulation method to decrease commutation torqueripple of brushless DC motors[J]. Transactions of China Electrotechnical Society, 2014, 29(5): 160-166. [8] Ozturk S B, Toliyat H A. Direct torque and indirect flux control of brushless DC motor[J]. IEEE/ASME Transactions on Mechatronics, 2011, 16(2): 351-360. [9] Ozturk S B, Alexander W C, Toliyat H A. Direct torque control of four-switch brushless DC motor with non-sinusoidal back EMF[J]. IEEE Transactions on Power Electronics, 2010, 25(2): 263-271. [10] 李珍国, 章松发, 周生海, 等. 考虑转矩脉动最小化的无刷直流电机直接转矩控制系统[J]. 电工技术学报, 2014, 29(1): 139-146. Li Zhenguo, Zhang Songfa, Zhou Shenghai, et al. Direct torque control of brushless DC motor considering torque ripple minimization[J]. Transactions of China Electrotechnical Society, 2014, 29(1): 139-146. [11] Fang Jiancheng, Zhou Xinxiu, Liu Gang. Instantaneous torque control of small inductance brushless DC motor[J]. IEEE Transactions on Power Electronics, 2012, 27(12): 4952-4964. [12] Shakouhi S M, Mohamadian M, Afjei E. Torque ripple minimization control method for a four-phase brushless DC motor with non-ideal back-electromotive force[J]. IET Electric Power Applications, 2013, 7(5): 360-368. [13] Fang Jiancheng, Li Haitao, Han Bangcheng. Torque ripple reduction in BLDC torque motor with nonideal back EMF[J]. IEEE Transactions on Power Electronics, 2012, 27(11): 4630-4637. [14] Sun Diansheng. Research on torque direct control method for brushless DC motors with non-ideal back EMF waveforms[C]//2nd International Conference on Artificial Intelligence, Management Science and Electronic, Dengleng, 2011: 7217-7220. [15] Zhang Di, Wang F, E1-Barbari S, et al. Improved asymmetric space vector modulation for voltage source converters with low carrier ratio[J]. IEEE Transactions on Power Electronics, 2012, 27(3): 1130-1140. [16] 程辉, 杨克立. 无刷直流电动机转矩脉动抑制的空间矢量电流控制策略[J]. 微特电机, 2015, 43(8): 61-64. Cheng Hui, Yang Keli. Space-vector current control for torque ripple attenuation of brushless DC motors[J]. Small & Special Electrical Machines, 2015, 43(8): 61-64. [17] 周扬忠, 程明, 熊先云. 具有零序电流自矫正的六相永磁同步电机直接转矩控制[J]. 中国电机工程学报, 2015, 35(10): 2504-2512. Zhou Yangzhong, Cheng Ming, Xiong Xianyun. Direct torque control for six-phase permanent magnet synchronous motor with zero-sequence current self-adjust[J]. Proceedings of the CSEE, 2015, 35(10): 2504-2512. [18] 石松宁, 王大志. 消弱永磁驱动器齿槽转矩的斜极优化方法[J]. 电工技术学报,2015,30(22)：27-32. Shi Songning, Wang Dazhi. Magnet skewing optimization method for reducing cogging torque in permanent magnet drive[J]. Transactions of China Electrotechnical Society, 2015, 30(22): 27-32. [19] Wu Di, Zhu Z Q. Design tradeoff between cogging torque and torque ripple in fractional slot surface- mounted permanent magnet machines[J]. IEEE Transactions on Magnetics, 2015, 51(11): 8108704. [20] 王东文, 李崇坚, 吴尧, 等. 永磁同步电机的模型预测电流控制器研究[J]. 电工技术学报, 2014, 29(1): 73-79. Wang Dongwen, Li Chongjian, Wu Yao, et al. Model predictive current control scheme for permanent magnet synchronous motors[J]. Transactions of China Electrotechnical Society, 2014, 29(1): 73-79. [21] 史婷娜, 李聪, 姜国凯, 等. 基于无模型预测控制的无刷直流电机 换相转矩波动抑制策略[J]. 电工技术学报, 2016, 31(15): 54-61. Shi Tingna, Li Cong, Jiang Guokai, et al. Model free predictive control method to suppress commutation torque ripple for brushless DC motor[J]. Transactions of China Electrotechnical Society, 2016, 31(15): 54-61. [22] 韦鲲, 胡长生, 张仲超. 一种新的消除无刷直流电机非导通相续流的PWM调制方式[J]. 中国电机工程学报, 2005, 25(7): 104-108. Wei Kun, Hu Changsheng, Zhang Zhongchao. A novel PWM scheme to eliminate the diode freewheeling of the inactive phase in BLDC motor[J]. Proceedings of the CSEE, 2005, 25(7): 104-108.
2017, Vol. 32 
