Model Free Predictive Control Method to Suppress Commutation Torque Ripple for Brushless DC Motor
Shi Tingna1, Li Cong1, Jiang Guokai1, Xia Changliang1,2
1.School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China 2.Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tianjin Polytechnic University Tianjin 300387 China
Abstract The torque ripple of brushless DC motor (BLDCM) generated in the commutation process seriously affects their applications in the precision servo system.This paper presents a model free predictive control method,which combines the universal model and the predictive control,to suppress the commutation torque ripple of the BLDCM.In this paper,the expression of the universal model of the brushless DC motor control system is derived.By taking the universal model as the predictive model to select the optimal switch state through the value function,the non-commutation phase current can be kept constant.The experimental results show that the proposed method can effectively suppress the commutation torque ripple of the BLDCM in both low and high speeds under the rated speed.Since parameters of electric machines are not necessary in the proposed control process,the algorithm is simple and easy to realize.
Shi Tingna,Li Cong,Jiang Guokai等. 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.
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2016, Vol. 31 
