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| Sensorless BLDC Drive Allowing for Neutral Point Voltage |
| Wang Huabin, Liu Heping, Zhang yi, Liu ping |
| State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400030 China |
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Abstract A novel sensorless scheme for brushless DC (BLDC) motor drives is presented in order to solve the problem that it is very difficult to detect the rotor position at low speeds. The method is based on the fact that stator windings inductance of salient BLDC is the function of the rotor position. When the H_PWM-L_PWM modulation mode is adopted for the salient BLDC motor, the fluctuation of neutral point voltage could be used to justify if the self inductance of energized stator windings is equal, from which the zero-cross point of back electromotive force (back-EMF) could be determined. Referring to the back-EMF method, there is offset between zero-cross point of back-EMF and required commutation positions, which must be compensated to ensure efficient and smooth operation of the motor. Theoretical derivation proves this method is correct. In the experimental system, the commutation signal from the proposed method is compared with the signal form Hall sensor and results confirm the validity of the proposed method.
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Received: 02 April 2008
Published: 17 February 2014
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[1] Paul P Acarnley, John F. Review of position sensorless operation of brushless permanent magnet machines[J]. IEEE Transactions on Industrial Electro- nics, 2006, 53(2):252-262.
[2] Johnson J P, Ehsani M, Guzelgunler Y. Review of sensorless methods for brushless DC[C]. IEEE-IAS Annu. Meeting, 1999:143-150.
[3] Shao Jianwen, Dennis Nolan. A novel direct back EMF detection for sensorless brushless DC (BLDC) motor drives[C]. Applied Power Electronics Conference and Exposition, .17 Annual IEEE, 2002, 1: 10-14, 33-37.
[4] 张磊, 瞿文龙. 一种新颖的无刷直流电机无位置传感器控制系统[J]. 电工技术报, 2006, 21(10):26-32.
[5] Kulkami A, Ehsani M, A novel position sensor elimination technique for the interior permanent magnet synchronous motor drive[J]. IEEE Trans. on Industry Application, 1992, 28(2):144-150.
[6] Bins K J, Shimmin D W, Aubidi K M AL. Implicit rotor position sensing using motor winding for a self commutating permanent magnet drive system[J]. IEE Proceedings-B, 1991, 138(1):28-34
[7] Jansen P L, Coley M, Lorenz R D. Flux, position, and velocity estimation in AC machines at zero speed via trackong of high frequency saliencies[C]. 5th European Power Electronics(EPE) Conf. Rec, 1995: 154-160
[8] 翟波, 李建春. 无位置传感器无刷直流电动机起动新方法[J]. 中国惯性技术学报, 2007, 15(3):347-350.
[9] Shen J X, Tseng K J. Analyses and compensation of rotor position detection error in sensorless PM brushless DC motordrives[J]. IEEE Transactions on Energy Conversion, 2003, 18(1):87-93.
[10] Askok B Kulkarni. A novel position sensor elimination technique for the interior permanent- magnet synchronous motor drive[J]. IEEE Transac- tions on Indusrty Applications, 1992, 28(1): 144-150.
[11] Hyeong Gee Yee, Chang Seok Hong. Sensorless drive for interior permanent magnet brushless DC motors[C]. 1997 IEEE International Electric Machines and Drives Conference, 1997 TD1/3.1 -TD1/3.3.
[12] 邱建琪. 永磁无刷直流电动机转矩脉动抑制的控制策略研究[D]. 杭州: 浙江大学, 2002.
[13] 张相军, 陈伯时. 无刷直流电机控制系统中PWM调制方式对换相转矩脉动的影响[J]. 电机与控制学报, 2003, 7(2): 87-91. |
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2009, Vol. 24 
