Title: Second-order terminal sliding mode control of five-phase IPMSM with super twisting observer under demagnetisation fault

Authors: Yaser Zafari; Sajjad Shoja-Majidabad

Addresses: Department of Electrical Engineering, Miandoab Branch, Islamic Azad University, Miandoab, 5971834773, Iran ' Department of Electrical Engineering, University of Bonab, Bonab, P.O. Box: 55517-61167, Iran

Abstract: This paper deals with demagnetisation fault detection and tolerance for five-phase interior permanent magnet synchronous motors through a second-order sliding mode controller/observer. At the beginning, a super twisting flux-linkage observer is proposed to cope with the chattering problem. This observer estimates the flux-linkage through stator estimated currents. Further, a novel second-order terminal sliding mode controller is developed for mechanical speed control in the presence of the detected demagnetisation fault. Finally, various simulations validate the feasibility and effectiveness of the proposed controller/observer for a five-phase interior permanent magnet synchronous motor.

Keywords: five-phase IPMSM; super twisting observer; second order observer; fault tolerant drive; demagnetisation fault; second-order sliding mode controller; high order sliding mode; terminal sliding mode.

DOI: 10.1504/IJMIC.2020.110355

International Journal of Modelling, Identification and Control, 2020 Vol.34 No.2, pp.127 - 136

Received: 26 Jul 2019
Accepted: 31 Jan 2020
Published online: 15 Oct 2020 *

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