Analysis of Torque Ripple and Speed Control of Five Phase BLDC Motor

International Journal of P2P Network Trends and Technology (IJPTT)          
© 2015 by IJPTT Journal
Volume - 5 Issue - 6
Year of Publication : 2015
Authors : K.Anand, V. Sathishkumar, A.Jagadeeshwaran, V.M.Periyasamy


K.Anand, V. Sathishkumar, A.Jagadeeshwaran, V.M.Periyasamy "Analysis of Torque Ripple and Speed Control of Five Phase BLDC Motor". International Journal of P2P Network Trends and Technology (IJPTT), V5(6):1-4 Nov - Dec 2015, ISSN:2249-2615, Published by Seventh Sense Research Group.


Torque ripple is a major concern in slow speed and pointing applications. Hence This paper aims in the analysis of torque ripple of multiphase BLDC motor. A five phase 3.2 Nm, 10000 rpm Trapezoidal type BLDC motor is chosen for analysis. Simulation is carried out for controlling the speed of five phase BLDC motor in MATLAB R2013a. Block level simulation is carried out in SIMULINK with the decoder logic subsystem, controller, driver and MOSFET switches.The speed profile is analysed for various speed input commands over the full range up to rated speed. Torque ripple is studied and it is compared with the same capacity three phase BLDC motor. The input voltage required for the full range of speed upto rated speed is obtained from simulation results. Controller fine tuning is carried out for smooth and precise speed control.


[1] L. Parsa, “On advantages of multi-phase machines,” in Proc. IEEE Ind. Electron. Soc. Annu. Conf., Nov. 2005, pp. 1574–1579.
[2] P J McCler, J M Bailey,J“Five phase trapezoidal backemf PM synchronous machines and drives” Proceedings of European conference on power electronics and application septembet 1991 pp 4 128-133.
[3] L. Parsa and H. Toliyat, “Multi-phase permanent-magnet motor drives,” IEEE Trans. Ind. Appl., vol. 41, no. 1, pp. 30–37, Jan./Feb. 2005.
[4] P Pillay and R Krishnan “Modelling and simulation and analysis of permanent magnet motor drives The brushless dc motor drive” IEEE transactions on industry application vol 25 2 march april 1989 pp274-279.
[5] P. Pillay and R. Krishnan, “Modeling of permanent magnet motor drives,”IEEETrans.Ind.Electron., vol. 35, no. 4, pp. 537–541, Nov. 1988.
[6] H. R. Bolton and R. A. Ashen, "Influence of motor design and feedcurrent waveform on torque ripple in brushless dc drives," Proc. Inst.Elec. Eng., vol. 131, Pt. B, pp. 82-90, May 1984.
[7] Wael A. SALAH, Dahaman ISHAK, Khaleel J. HAMMADI "Minimization of torque ripples in BLDC motors due to phase commutation", in Electrical Review, ISSN 0033-2097, R. 87 NR 1/2011.
[8] L. Parsa and H. Toliyat, “Fault-tolerant five-phase permanent magnet motor drives,” in Conf. Rec. IEEE IAS Annu.Meeting, Oct. 2004, pp.1048–1054.
[9] P Pillay and R. Krishnan “ Application characteristics of permanent magnet synchronous and brushless dc motors for servo drives” IEEE Trans IndApplvol 27 no 5, pp 986-996 sep/oct 1991.
[10] Anas S.R, Jaison H, Gopinath A, Namboothiripad M.N, Nandakumar M.P “Modeling and simulation analysis of redundant electromechanical actuator bases servo system” International conference on comuter communication and electrical technology 2011 pp 358-363.

The results of speed profile and torque ripple is presented.