Sliding mode observer for wide-speed sensorless control of PMSM drives

Many of the estimation techniques developed to achieve speed or position sensorless, motor drives suffer from the variation of motor parameters such as the stator resistance, stator inductance or torque constant. In particular, conventional linear estimators are not adaptive to variations of the operating point. The sliding mode technique has shown promising results when estimating or controlling nonlinear systems. This paper presents a sliding mode observer (SMO) for estimating the position and speed of a permanent magnet synchronous motor (PMSM) to achieve sensorless drive system. The technique can be generalized to other motor drives and motion control systems. The effects of the variation of motor parameters such as stator resistance and stator inductance on the position and/or speed estimations, over a wide speed range, have been studied. Compared to other methods, the observer is more robust to parameter detuning. Simulations results are presented.

[1]  Kyeong-Hwa Kim,et al.  Parameter estimation and control for permanent magnet synchronous motor drive using model reference adaptive technique , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.

[2]  Carlos H. Muravchik,et al.  A nonlinear reduced order observer for permanent magnet synchronous motors , 1996, IEEE Trans. Ind. Electron..

[3]  Peter Vas,et al.  Sensorless vector and direct torque control , 1998 .

[4]  Seung-Ki Sul,et al.  High performance PMSM drives without rotational position sensors using reduced order observer , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[5]  Vadim I. Utkin,et al.  Sliding mode control in electromechanical systems , 1999 .

[6]  Shigeru Okuma,et al.  A position-and-velocity sensorless control for brushless DC motors using an adaptive sliding mode observer , 1992, IEEE Trans. Ind. Electron..

[7]  Shigeru Okuma,et al.  New adaptive sliding observers for position- and velocity-sensorless controls of brushless DC motors , 2000, IEEE Trans. Ind. Electron..

[8]  Takeshi Furuhashi,et al.  A position and velocity sensorless control of brushless DC motors using an adaptive sliding observer , 1990, [Proceedings] IECON '90: 16th Annual Conference of IEEE Industrial Electronics Society.

[9]  P. C. Cortizo,et al.  Speed control of permanent magnet motors using sliding mode observers for induced EMF position and speed estimation , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.

[10]  Marco Tursini,et al.  Sensorless speed control of a PM synchronous motor by sliding mode observer , 1997, ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics.