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Advances in Power Electronics
Volume 2011 (2011), Article ID 273081, 11 pages
Research Article

Application of Quadratic Linearization for the Control of Permanent Magnet Synchronous Motor

1Hindustan Institute of Technology and Science, Chennai 600 016, India
2SSN College of Engineering, Chennai 600 004, India

Received 30 June 2011; Accepted 8 August 2011

Academic Editor: Henry S. H. Chung

Copyright © 2011 Parvathy Ayalur Krishnamoorthy et al. 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.


Many of the existing control methods for the permanent magnet synchronous motor (PMSM) either deal with steady state models or consider dynamic models under particular cases. A dynamic model of the PM machine allows powerful control-theoretic techniques such as linearization to be applied to the system. Existing exact feedback linearization of dynamic model of PMSM suffers from singularity issues. In this paper, we propose a quadratic linearization approach for PMSM based on the approximate linearization technique which does not introduce singularities. A MATLAB simulation is used to verify the effectiveness of the linearization technique proposed. Also, to account for higher-order and unmodelled dynamics of PMSM, tuning of the linearizing transformation is proposed and verified using simulation.