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Energies 2017, 10(2), 167; doi:10.3390/en10020167

Adaptive Torque Estimation for an IPMSM with Cross-Coupling and Parameter Variations

1
Center, Dongwoon Anatech Co. Ltd., Seoul 05029, Korea
2
Department of Electrical Engineering, Konkuk University, Seoul 05029, Korea
3
Department of Energy Mechanical Engineering, Gyeonggi College of Science and Technology, Gyeonggi 15073, Korea
4
Department of Creative IT Engineering, Phohang University of Science and Technology, Gyeongbuk 37673, Korea
*
Author to whom correspondence should be addressed.
Received: 30 September 2016 / Accepted: 23 January 2017 / Published: 27 January 2017
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Abstract

This paper presents a new adaptive torque estimation algorithm for an interior permanent magnet synchronous motor (IPMSM) with parameter variations and cross-coupling between d- and q-axis dynamics. All cross-coupled, time-varying, or uncertain terms that are not part of the nominal flux equations are included in two equivalent mutual inductances, which are described using the equivalent d- and q-axis back electromotive forces (EMFs). The proposed algorithm estimates the equivalent d- and q-axis back EMFs in a recursive and stability-guaranteed manner, in order to compute the equivalent mutual inductances between the d- and q-axes. Then, it provides a more accurate and adaptive torque equation by adding the correction terms obtained from the computed equivalent mutual inductances. Simulations and experiments demonstrate that torque estimation errors are remarkably reduced by capturing and compensating for the inherent cross-coupling effects and parameter variations adaptively, using the proposed algorithm. View Full-Text
Keywords: adaptive torque estimation; interior permanent magnet synchronous motor (IPMSM); parameter variations; cross-coupling; equivalent mutual inductance; equivalent back electromotive forces (EMF) adaptive torque estimation; interior permanent magnet synchronous motor (IPMSM); parameter variations; cross-coupling; equivalent mutual inductance; equivalent back electromotive forces (EMF)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, D.; Mok, H.; Lee, J.; Han, S. Adaptive Torque Estimation for an IPMSM with Cross-Coupling and Parameter Variations. Energies 2017, 10, 167.

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