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Journal of Sensors
Volume 2016, Article ID 9307560, 9 pages
http://dx.doi.org/10.1155/2016/9307560
Research Article

Fault Reconstruction Based on Sliding Mode Observer for Current Sensors of PMSM

College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, China

Received 6 January 2015; Revised 20 April 2015; Accepted 20 April 2015

Academic Editor: Mehmet Karakose

Copyright © 2016 Changfan Zhang 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.

Abstract

This paper deals with a method of phase current sensor fault reconstruction for permanent magnet synchronous motor (PMSM) drives. A new state variable is introduced so that an augmented system can be constructed to treat PMSM sensor faults as actuator faults. This method uses the PMSM two-phase stationary reference frame fault model and a sliding mode variable structure observer to reconstruct fault signals. A logic algorithm is built to isolate and identify the faulty sensor for a stator phase current fault after reconstructing the two-phase stationary reference frame fault signals, which allows the phase fault signals to be reconstructed. Simulation results are presented to illustrate the functionality of the theoretical developments.