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This paper presents a magnetic saliency-based position estimation approach for a permanent magnet (PM) motor fed by a voltage-source pulse width modulation (PWM) inverter. The proposed real-time estimation algorithm detects motor current harmonics and calculates the inductance matrix, including rotor position information. Position estimation can be performed every period of PWM or carrier cycle. An experimental system using an interior permanent magnet (IPM) synchronous motor has been constructed. Experimental results verify that position estimation within 10° in electrical angle is obtained at standstill and at speeds as low as 1 r/min by the proposed approach
Interior permanent magnet synchronous motor
Digital Object Identifier: 10.1109/28.658742
Published with permission from the copyright holder. This is the institute's copy, as published in Industry Applications, IEEE Transactions on, Jan.-Feb. 1998, Volume 34, Issue 1, Pages 163-168.
Copyright © 1998 IEEE. All rights reserved.