Torque Ripple Reduction Technique in SRM for Low Speed Range by Employing Fuzzy Logic for Dynamic Controlling of TSF
Subject Areas : electrical and computer engineeringH. Moradi Cheshmeh-Beigi 1 * , E. Nouri 2
1 - Razi University
2 - Razi University
Keywords: SRMtorque rippleTSFfuzzy logicand turn-on angle,
Abstract :
In this paper, in order to reduce torque ripple for low speed range in non-commutation region, instead of exciting by a DC current, a adjustable current according to rotor position is injected. Also, to reduce torque ripple in commutation region the modified torque sharing function (TSF) method has been used. In the proposed method, TSF is modified by a feedback from the motor speed and applying it to a fuzzy controller according to speed value. In the proposed method, motor speed, torque error, and torque error derivative are used as fuzzy controller inputs, which Turn-On and overlap angles between the phases are changed as a function of motor speed. Also reference torque of adjacent phase is modified as a function of torque error and torque error derivative. In this method, TSF is modified dynamically and momentary. The exact simulation based on Matlab/Simulink for a 3-phase 6/4 SRM are carried out to verify the effectiveness of the proposed novel method for 0 to 1500rpm speed range.
[1] P. Vujicic, "Minimization of torque ripple and copper losses in switched reluctance drive," IEEE Trans. Power Electron, vol. 27, no. 1, pp. 388-389, Jan. 2012.
[2] M. Dowlatshahi, S. M. Saghaiannejad, J. W. Ahn, and M. Moallem, "Copper loss and torque ripple minimization of switched reluctance motors considering nonlinear and magnetic saturation effects," J. of Power Electronics, vol. 14, no. 2, pp. 351-361, Mar. 2014.
[3] Y. Z. Xu, R. Zhong, S. L. Lu, and L. Chen, "Analytical method to optimize turn-on angle and turn-off angle for switched reluctance motor drives," IET Electric Power Applications, vol. 6, no. 9, pp. 593-603, Nov. 2012.
[4] X. D. Xue, K. W. E. Cheng, and S. L. Ho, "Optimaization and evaluation of torque sharing functions for torque ripple minimizationin switched reluctance motor drives," IEEE Trans. on Power Electron, vol. 24, no. 9, pp. 2076-2090, Sept. 2009.
[5] M. Dowlatshahi, S. M. Saghaiannejad, J. W. Ahn, and M. Moallem, "Minimization of torque-ripple in switched reluctance motors over wide speed range," J. Electr Eng Technol, vol. 9, no. 2, pp. 478-488, Dec. 2014.
[6] Q. Sun, J. Wu, C. Gan, Y. Hu, and J. Si, "OCTSF for torque ripple minimization in SRMs," IET Power Electron., vol. 9, no. 14, pp. 2741-2750, Nov. 2016.
[7] J. Ye, B. Bilgin, and A. Emadi, "An offline torque sharing function for torque ripple reduction in switched reluctance motor drives," IEEE Trans. Energy Convers, vol. 30, no. 2, pp. 726-735, Jun. 2015.
[8] J. Ye, B. Bilgin, and A. Emadi, "An extended-speed low-ripple torque control of switched reluctance motor drives," IEEE Trans. Power Electron., vol. 30, no. 3, pp. 1457-1470, Mar. 2015.
[9] Y. Hu, C. Gan, W. Cao, et al., "Central-tapped node linked modular fault-tolerance topology for SRM applications," IEEE Trans. Power Electron., vol. 31, no. 2, pp. 1541-1554, Feb. 2016.
[10] H. Moradi Cheshmehbeigi, S. Yari, A. R. Yari, and E. Afjei, "Self-tuning approach to optimization of excitation angles for switched reluctance motor drives using fuzzy adaptive controller," in Proc. Conf. 13th European Conference on Power Electronics and Applications, EPE’09, 10 pp., Barcelona, Spain, 8-10 Sept. 2009.
[11] S. K. Sahoo, S. Dasgupta, S. K. Panda, and J. X. Xu, "A Lyapunov function based robust direct torque controller for switched reluctance motor drive system," IEEE Trans. on Power Electronics, vol. 27, no. 2, pp. 555-564, Feb. 2012.
[12] J. Castro, P. Andrada, and B. Blanque, "Minimization of torque ripple in switched reluctance motor drives using direct instantaneous torque control," in Proc. Int. Conf. on Renewable Energies and Power Quality, pp. 1021-1026, Santiago de Compostela, Spain, Mar. 2012.
[13] R. Gobbi and K. Ramar, "Practical current control techniques for torque ripple minimization in SR motors," in Proc. 2nd IEEE Int. Conf. on Power and Energy, vol. 2, pp. 743-748?, Johor Baharu, Malaysia, Dec. 2008.
[14] R. Krishnan, Switched Reluctance Motor Drives: Modeling, Simulation, Analysis, Design and Application, Boca Raton, FL: CRC CRC Press, 2001.