Sensorless Speed Control of Permanent-Magnet Synchronous Motor Based on a New Sliding-Mode Observer

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In this paper, a new sensorless speed control strategy which is based on a new sliding-mode observer (SMO) is proposed for permanent-magnet synchronous motor (PMSM). The rotor position is estimated by the back electromotive force (EMF). In order to improve the estimation accuracy, the speed estimator is proposed, which replace the method of direct differential. The Lyapunov theory is applied to prove the stability of the designed system. The simulation results indicate that the proposed sensorless speed control system of permanent-magnet synchronous motor based on a new sliding-mode observer is effective and feasible.

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397-401

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November 2014

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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