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This paper investigates a novel rotor configuration of a permanent-magnet synchronous machine (PMSM) in which a saliency modulation rotor end is added to the machine rotor to improve the self-sensing capability. The saliency-based self-sensing control method is widely adopted for position estimation at stand-still and low speed range. However, the performance is heavily affected by saturation effects...
Based on the analysis of compressor load behaviors, a new three-phase startup strategy for permanent magnet synchronous motor (PMSM) compressor is presented, which includes parking, open-loop startup and closed-loop operation. When the speed loop closes, an improved method of flux estimation for PMSM compressor sensorless control is proposed, which accomplishes parking, efficient speed estimation...
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