Modified sliding mode observer for wide speed range operation of brushless DC motor

Abstract

This paper describes an adaptive gain sliding mode observer for brushless DC motor for large variations in speed. Sensorless brushless DC motor based on sliding mode observer exhibits multiple zero crossing in back electromotive force (EMF) which leads to commutation problems at low speed. In this paper, a modified sliding mode observer incorporating a speed component in the estimation of back EMF is proposed. It is found that after incorporating the speed component in the back EMF observer gain, multiple zero crossings at low speeds and phase shift at higher speeds are eliminated. The trapezoidal back EMF observer is implemented experimentally on a digital signal processor (DSP) board. The effectiveness of the proposed method is demonstrated through simulations and experiments.

Keywords

brushless DC (BLDC) / back electromotive force (EMF) / sliding mode observer

References

[1] Becerra R C, Ehsani M. High-speed torque control of brushless permanent magnet motors. IEEE Transactions on Industrial Electronics, 1988, 35(3): 402-406

[2] Hubik V, Sveda M, Singule V. On the development of BLDC motor control run-up algorithms for aerospace application. In: Proceedings of the 13th Power Electronics and Motion Control Conference (EPE-PEMC 2008). 2008, 1620-1624

[3] Becerra R C, Jahns T M, Ehsani M. Four-quadrant sensorless brushless ECM drive. In: Proceedings of the Sixth Annual Applied Power Electronics Conference and Exposition (APEC 1991). 1991, 202-209

[4] Iizuka K, Uzuhashi H, Kano M, Endo T, Mohri K. Microcomputer control for sensorless brushless motor. IEEE Transactions on Industry Applications, 1985, IA-21(3): 595-601

[5] Shao J, Nolan D, Hopkins T. A novel direct back EMF detection for sensorless brushless DC (BLDC) motor drives. In: Proceedings of the Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2002). 2002, 1: 33-37

[6] Su G J, McKeever J W. Low-cost sensorless control of brushless DC motors with improved speed range. IEEE Transactions on Power Electronics, 2004, 19(2): 296-302

[7] Damodharan P, Sandeep R, Vasudevan K. Simple position sensorless starting method for brushless DC motor. IET Electric Power Applications., 2008, 2(1): 49-55

[8] Damodharan P, Vasudevan K. Sensorless brushless DC motor drive based on the zero-crossing detection of back electromotive force (EMF) from the line voltage difference. IEEE Transactions on Energy Conversion, 2010, 25(3): 661-668

[9] Ogasawara S, Akagi H. An approach to position sensorless drive for brushless DC motors. IEEE Transactions on Industry Applications, 1991, 27(5): 928-933

[10] Jahns T M, Becerra R C, Ehsani M. Integrated current regulation for a brushless ECM drive. IEEE Transactions on Power Electronics, 1991, 6(1): 118-126

[11] Acarnley P P, Watson J F, 0. Review of position-sensorless operation of brushless permanent-magnet machines. IEEE Transactions on Industrial Electronics, 2006, 53(2): 352-362

[12] Kim T, Lee H W, Ehsani M. Position sensorless brushless DC motor/generator drives: Review and future trends. IET Electric Power Applications, 2007, 1(4): 557-564

[13] Zhang L, Xiao W, Qu W. Sensorless control of BLDC motors using an improved low-cost back EMF detection method. In: Proceedings of the 2006 IEEE Power Electronics Specialists Conference. 2006, 322-328

[14] Moreira J C. Indirect sensing for rotor flux position of permanent magnet AC motors operating over a wide speed range. IEEE Transactions on Industry Applications, 1996, 32(6): 1394-1401

[15] Shen J X, Zhu Z Q, Howe D. Sensorless flux-weakening control of permanent-magnet brushless machines using third harmonic back EMF. IEEE Transactions on Industry Applications, 2004, 40(6): 1629-1636

[16] Shen J X, Iwasaki S. Sensorless control of ultrahigh-speed PM brushless motor using PLL and third harmonic back EMF. IEEE Transactions on Industrial Electronics, 2006, 53(2): 421-428

[17] Johnson J P, Ehsani M, Guzelgunler Y. Review of sensorless methods for brushless DC. In: Proceedings of the 1999 IEEE Industry Applications Conference (The Thirty-Fourth IAS Annual Meeting). 1999, 1: 143-150

[18] Dhaouadi R, Mohan N, Norum L. Design and implementation of an extended Kalman filter for the state estimation of a permanent magnet synchronous motor. IEEE Transactions on Power Electronics, 1991, 6(3): 491-497

[19] Qiu A, Wu B, Kojori H. Sensorless control of permanent magnet synchronous motor using extended Kalman filter. In: Proceedings of the Canadian Conference on Electrical and Computer Engineering (CCECE 2004). 2004, 3: 1557-1562

[20] Peixoto Z M A, Freitas Sa F M, Seixas P F, Menezes B R, Cortizo P C, Lacerda W S. An interior permanent magnet synchronous motor position control using sliding mode. In: Proceedings of the 1995 International Conference on Power Electronics and Drive Systems (PEDS 95). 1995, 599-604

[21] Kim Y S, Ahn J Y, You W S, Cho K M. A speed sensorless vector control for brushless DC motor using binary observer. In Proceedings of the 1996 IEEE IECON 22nd International Conference on Industrial Electronics, Control, and Instrumentation. 1996, 3: 1746-1751

[22] Feyzi M R, Shafiei M, Koushahi M B, Mozaffari Niapour S A K. Position sensorless direct torque control of brushless DC drives based on sliding mode observer using NSGA-II algorithm optimization. In: Proceedings of the 2011 2nd Power Electronics, Drive Systems and Technologies Conference (PEDSTC). 2011, 151-156

[23] Fakham H, Djemai M, Reama A, Blazevic P. Sliding mode observer for position and speed estimations in brushless DC motor (BLDCM). In: Proceedings of the 2004 IEEE International Conference on Industrical Technology (IEEE ICIT’04). 2004, 1: 121-126

[24] Fakham H, Djemai M, Busawon K. Design and practical implementation of a back-EMF sliding-mode observer for a brushless DC motor. IET Electric Power Applications, 2008, 2(6): 353-361

[25] Deenadayalan A, Saravana Ilango G. Modified sliding mode observer for position and speed estimations in brushless DC motor. In: Proceedings of the 2011 Annual IEEE India Conference (INDICON). 2011, 1-4

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