A New Vector Control for Energy-Efficient/Wide-Speed-Range Drives of Sensorless Permanent-Magnet Synchronous Motor

Abstract

This paper proposes a new sensorless vector control method for energy-efficient and wide-speed-range drives of sensorless permanent-magnet synchronous motors. The proposed method has the following features: 1) current limitation. 2) high efficiency, 3) wide-speed-range drive under voltage limit. These features are realized in a very simple manner and can perform adaptively in all sensorless driving modes including motoring/regenerating and steady/transient states. The usefulness of the proposed method is verified by extensive experiments.