Torque Ripple Minimization of BLDC Motor by Using Vector Control

International Journal of Electrical and Electronics Engineering
© 2015 by SSRG - IJEEE Journal
Volume 2 Issue 5
Year of Publication : 2015
Authors : R.Keerthi Paul, P.Pradeep
How to Cite?

R.Keerthi Paul, P.Pradeep, "Torque Ripple Minimization of BLDC Motor by Using Vector Control," SSRG International Journal of Electrical and Electronics Engineering, vol. 2,  no. 5, pp. 10-15, 2015. Crossref,


 This paper provides an alternative approach to reduce torque ripple in Square-wave PM Motors (BLDC motor). Instead of conventional square-wave form, the method uses the principle of vector control to optimally design the wave-form of reference current in such a way that the torque ripple is minimal. The proposed Vector Control has advantage of the torque ripple is greatly reduced, and the flux weakening for constant-power high-speed mode can be achieved by injecting a negative d-axis current into the control system, just like for the case of PM Synchronous Motors (sine type machines).


 Brushless DC motor, Trapezoidal type machine, PM synchronous motor, Sine type machine, Vector control, Torque ripple minimization.


[1] J.R. Hendershot Jr., T. J. E. Miller, Design of Brushless Permanent-Magnet Motors, Magna Physics Publications – Oxford Science Publications, 1994.
[2] H. Le-Huy, R. Perret, and R. Feuillet, “Minimization of torque ripple in brushless DC motor drive”, IEEE Transactions on Industry Applications, vol. 22, July/Aug. 1986, pp. 748–755.
[3] Joachim Holtz, “Identification and Compensation of Torque Ripple in High-Precision Permanent Magnet Motor Drives”, IEEE Transactions on Industrial Electronics, vol. 43, no.2, April 1996, pp. 309–320.
[4] Thomas M. Jahns and Wen L. Soong, “Pulsating Torque Minimization Techniques for Permanent Magnet AC Motor Drives - A Review”,IEEE Tran. on Ind. Electronics, vol. 43, no. 2, April 1996, pp. 321–330.
[5] Yong Liu, Z. Q. Zhu and David Howe, “Direct Torque Control of Brushless DC Drives With Reduced Torque Ripple”, IEEE Tran. on Industry Applications, vol. 41, no. 2, March/April 2005, pp. 599–608.
[6] Haifeng Lu, Lei Zhang and Wenlong Qu, “A New Torque Control Method for Torque Ripple Minimization of BLDC Motors With Un-Ideal Back EMF”, IEEE Transactions on Power Electronics, vol. 23, no. 2, March 2008, pp. 950–958.
[7] Y. Liu, Z. Q. Zhu, and D. Howe, “Direct torque control of brushless DC drives with reduced torque ripple,” IEEE Trans. Ind. Appl., vol. 41, no. 2,pp. 599–608, Mar./Apr. 2005.
8] S. B. Ozturk, W. C. Alexander, and H. A. Toliyat, “Direct torque control of four-switch brushless DC motor with non-sinusoidal back EMF”, IEEE Trans. Power Electron., vol. 25, no. 2, pp. 263-271, 2010.
[9] F. Jiancheng, L. Haitao, and H. Bangcheng, “Torque ripple reduction in BLDC torque motor with non-ideal back EMF”, IEEE Trans. Power Electron., vol. 27, no. 11, pp. 4630-4637, 2012.
[10] Z. Q. Zhu, and J. H. Leong, “Analysis and mitigation of torsional vibration of PM brushless AC/DC drives with direct torque controller”,IEEETrans. Ind. Appl., vol. 48, no. 4, pp. 1296-1306, 2012.
[11] S. B. Ozturk, and H. A. Toliyat, “Direct torque and indirect flux control of brushless DC motor”, IEEE Trans. Mechatronics, vol. 16, no. 2, pp 351-360, 2011.
[12] P. J. Sung, W. P. Han, L. H. Man, and F.Harashima, “A new approach for minimum-torque-ripple maximum-efficiency control of BLDC motor”, IEEE Trans. Ind. Electron., vol. 47, no. 1, pp. 109-114, 2000.
[13] C. S. Joice, S. R. Paranjothi, and V. J. S. Kumar, “Digital control strategy for four quadrant operation of three phase BLDC motor with load variations”, IEEE Trans. Ind. Appl., vol. 9, no. 2, pp. 974-982, 2013.
[14] J. Fang, X. Zhou, and G. Liu, “Instantaneous torque control of small inductance brushless DC motor”, IEEE Trans. Power. Electron., vol. 27,no. 12, pp. 4952-4964, 2012.
[15] Y. Liu, Z. Q. Zhu, and D. Howe, “Instantaneous torque estimation in sensor less direct torque controlled brushless DC motors,” IEEE Trans, Ind. Appl., vol. 42, no. 5, pp. 1275–1283, Sep./Oct. 2006.
[16] Z. Q. Zhu, Y. Liu, and D. Howe, “Comparison of performance of brushless DC drives under direct torque control and PWM current control,”KoreanIEE Int. Trans. Elect. Mach. Energy Conversion. Syst., vol. 5-B, no. 4,pp. 337–342, 2005.