Sensorless Control of PMSM Based on Low-Frequency Current Signal Injection in the Direct Axis at Low and Zero Speed


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A novel sensorless control method of permanent magnet synchronous motor (PMSM) based on low frequency (LF) current signal injection is proposed in this paper. A LF sinusoidal current signal is superimposed into the estimated d-axis, and the corresponding voltage response and current response are detected to estimate the rotor speed and the rotor position. This method doesn't rely on the non-ideal features but just the fundamental model of PMSM. As a result, the introduced method can be applied to not only IPMSM, but also to SPMSM. Theoretical analysis and simulation results are carried out. The simulation results indicate that the rotor position and speed can be obtained exactly at low and zero speed. The approach ensures good dynamic and static performances, and can realize accurate position servo control.



Edited by:

Xudong Wang, Baoyu Xu and Shaobo Zhong




Y. D. Li et al., "Sensorless Control of PMSM Based on Low-Frequency Current Signal Injection in the Direct Axis at Low and Zero Speed", Applied Mechanics and Materials, Vols. 143-144, pp. 103-107, 2012

Online since:

December 2011




[1] K. W. Lee, D. H. Jung, I. J. Ha, An online identification method for both stator resistance and back-EMF coefficient of PMSM without rotational transducers, IEEE Transaction on Industry Electronics, vol 51, p.507–510, Apr (2004).


[2] A. Piippo, M. Hinkkanen, J. Luomi, Analysis of an adaptive observer for sensorless control of interior permanent magnet synchronous motors, IEEE Transaction on Industry Electronic, vol 55, p.570–576, Feb (2008).


[3] M. Eskola and H. Tuusa, Comparison of MRAS and novel simplemethod for position estimation in PMSM drives, Proc. IEEE PESC, Acapulco, Mexico, vol. 2, p.550–555, Jun (2003).


[4] Bologani, S, Tubiana, L, Zigliotto, M, Extended Kalman Filter Tuning in Sensorless PMSM Drives, IEEE Transaction on Industry Applications, vol 39, p.1741–1747, Nov-Dec (2003).


[5] Chan, T. F., Wang, W., Borsje, P., Wong, Y. K., Sensorless Permanent-magnet Synchronous Motor Drive Using a Reduced-order Rotor Flux Observer, IET Electric Power Applications, vol 2, p.88–98, Mar (2008).


[6] T. Kereszty, V. -M. Leppanen, and J. Luomi, Sensorless Control of Surface Magnet Synchronous Motors at Low Speeds Using Low-Frequency Signal Injection, " in Proc. IECON, 03, Nov. 2003, pp.1239-1243.


[7] Hyunbae Kim, Lorenz, R. D, Carrier Signal Injection based Sensorless Control Methods for IPM Synchronous Machine Drives, IEEE IAS Annual Meeting, vol 2, p.977–984, Oct (2004).


[8] Frederik M. L. De Belie, Peter Sergeant, Jan A. Melkebeek. A Sensorless Drive by Applying the Average-Current Samples, IEEE Transactions on Power Electronics, vol 25, p.875–887, Apr (2010).


[9] Matti Eskola, Heikki Tuusa. Sensorless control of salient pole PMSM using at low -frequency signal injection[J]. EPE,2005: 1-10.


[10] ShanshanWu, Yongdong Li, Xuejin Miao. Two signal injection methods for sensorless control of PMSM at very low speeds[J]. IEEE PESC 2007: 568-573.


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