Abstract：This paper presents essential analysis on the reason of commutation torque ripple in brushless DC motor(BLDCM). A unitive formula being suitable for different PWM schemes is derived to calculate the commutation torque ripple from the mathematic model of BLDCM. In order to suppress torque ripple in whole speed range, a new PWM strategy which can equalize the rising and falling slopes of phase current is proposed based on DC link current control. The new method has the advantage of simplicity, compared with the traditional control method. The outgoing phase is still holding modulation during commutation region without recalculating the PWM duty cycle, and digital control with fast dynamic response can be easily realized. Finally, the experienmental results verify the significant effectiveness of the new method, and it is preferable for the BLDCM drive system with aimed of high accuracy-controlling.
陈基锋, 张晓峰, 吴小康, 杭丽君, 吕征宇. 基于统一式的无刷直流电动机换相转矩脉动抑制新策略[J]. 电工技术学报, 2011, 26(4): 51-56.
Chen Jifeng, Zhang Xiaofeng, Wu Xiaokang, Hang Lijun, Lü Zhengyu. A Novel Strategy to Suppress Commutation Torque Ripple in Brushless DC Motor Based on Unitive Formula. Transactions of China Electrotechnical Society, 2011, 26(4): 51-56.
[1] Nam Ki Yong, Lee Woo Taik, Lee Choon Man, et al. Reducing torque ripple of brushless DC motor by varing input voltage[J]. IEEE Transactions on Magnetics, 2006, 42(4): 1307-1310. [2] 揭贵生, 马伟明. 考虑换相时无刷直流电机脉宽调制方法研究[J]. 电工技术学报, 2005, 20(9): 66-71. [3] Zhang Xiaofeng, Lü Zhengyu. A new BLDC motor drives method based on Buck converter for torque ripple reduction[C]. Proceedings of the 5th Power Electronics and Motion Control Conference, Shanghai, China, 2006, 1: 1-4. [4] Lee Kwang Woon, Kim Dae Kyong, Kim Tae Duck, et al. Commutation torque ripple reduction in a position sensorless brushless DC motor drive[C]. Proceedings of the 35th Annual IEEE Power Electronics Specialists Conference, Aachen, Germany, 2004: 1419-1423. [5] 李榕, 刘卫国, 刘向阳, 等. 永磁无刷直流电机消除逆变环流的弱磁性能研究[J]. 电工技术学报, 2007, 22(9): 62-67. [6] Liu Yong, Zhu Z Q, David Howe. Direct torque control of brushless DC drives with reduced torque ripple[J]. IEEE Transactions on Industry Applications, 2005, 41(2): 599-608. [7] Liu Yong, Zhu Z Q, David Howe. Commutation- torque-ripple minimization in direct-torque-controlled PM brushless DC drives[J]. IEEE Transactions on Industry Applications, 2007, 43(4): 1012-1021. [8] 齐蓉, 林辉, 陈明. 无刷直流电机换向转矩脉动分析与抑制[J]. 电机与控制学报, 2006, 10(3): 287-290. [9] Song Joong Ho, Ick Choy. Commutation torque ripple reduction in brushless DC motor drives using a single DC current sensor[J]. IEEE Transactions on Power Electronics, 2004, 19(2): 312-319. [10] 林平, 韦鲲, 张仲超. 新型无刷直流电机换相转矩脉动的抑制控制方法[J]. 中国电机工程学报, 2006, 26(3): 153-158. [11] 宋飞, 周波, 吴小婧. 抑制无刷直流电机换相转矩脉动的新型补偿策略[J]. 电工技术学报, 2008, 23(11): 28-33.
2011, Vol. 26 
