Analysis and Simulation on Torque Ripples of Brushless DC Motor

Qian Weikang, Shi Yutao


Because of its small size, high reliability, efficiency, and its output torque characteristics, brushless DC motor (BLDCM) had been widely used in many field of robotics, precision instruments and equipment, etc. However, its inherent electromagnetic torque ripple limited the scope of its application, which was the focus and difficulty of its research in recent years. This article first described the causes of brushless DC motor torque ripple, and then torque ripple generated by four PWM modulations was analyzed to get optimum control scheme, finally the MATLAB / SIMULINK simulation model verified the analysis of the results. This paper provided the most intuitionistic exhibition.


brushless DC motor;torque ripple;MATLAB/SIMULINK

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. Joong-Ho Song, Ick Choy. Commutation torque ripple reduction in brushless DC motor drives using a single DC current sensor. IEEE Trans Power Electronics vol.19,March 2004, pp. 312-319

. T. Nakata, N. Takahashi, and K. Uehara. Analysis of magnetic characteristics of a brushless dc motor taking into account the distribution of magnetization, IEEE Trans. on Magnetics, Vol. MAG-22, No. 5, pp.1084 - 1086, September 1986.

. KWON B H, MIN B D. A fully software-controlled PWM rectifier with current link[J]. IEEE Trans Ind Elec, 1993, 40(3):355-363

. Auzani Jidin, Tole Sutikno. MATLAB/SIMULINK Based Analysis of Voltage source Inverter with Space Vector Modulation, TELKOMNIKA Vol. 7, No. 1, April 2009 : 23 – 30

. R. Carlson, M. Lajoie-Mazenc, and J.C.D.S. Fagundes. Analysis of torque ripple due to phase commutation in brushless DCmachines, IEEE Trans. Ind. Appl., vol.28, no.3, pp. 632-638,May/Jun. 1992

. Renato Carlson. Analysis of Torque Ripple Due to Phase Commutation in Brushless dc Machines. Ieee Transactions on industry appliation, vol. 28, no. 3,may/june 1992

. M. Lajoie-Mazenc, B. Nogarede, and J. C. Fagundes. Analysis of torque ripple in electronically commutated permanent magnet machines and minimization methods, in Conf. Rec. Fourth Int.Conf. Elect. Machines Drives (London), Sept. 13-15, 1989, pp.85-89.