A New Speed Sensorless Controller Based on Double Observers for Permanent-Magnet Synchronous Motor


A new sensorless speed control method which is based on new sliding-mode observer (SMO) is proposed for permanent-magnet synchronous motor (PMSM). The main basis of the observer is the back electromotive force (EMF). The rotor speed is estimated by the back EMF observer (BEMFO). The method can be better than low-pass filter in accuracy. In the observer, the… (More)


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