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Energies 2019, 12(1), 170; https://doi.org/10.3390/en12010170

Current Control of a Six-Phase Induction Machine Drive Based on Discrete-Time Sliding Mode with Time Delay Estimation

1
Power Electronics and Industrial Control Research Group (GRÉPCI), École de Technologie Supérieure, Montreal H3C 1K3, QC, Canada
2
Laboratory of Power and Control Systems (LSPyC), Facultad de Ingeniería, Universidad Nacional de Asunción, Luque 2060, Paraguay
3
Applied Power Electronics Technology Research Group (APET), Universidad de Vigo, 36310 Vigo, Spain
4
Electrical Engineering Department, Ecole Mohammadia d’Ingénieurs, University of Mohammed V, Rabat 765, Morocco
*
Author to whom correspondence should be addressed.
Received: 22 November 2018 / Revised: 27 December 2018 / Accepted: 29 December 2018 / Published: 5 January 2019
(This article belongs to the Special Issue Control of Multiphase Machines and Drives)
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Abstract

This paper proposes a robust nonlinear current controller that deals with the problem of the stator current control of a six-phase induction motor drive. The current control is performed by using a state-space representation of the system, explicitly considering the unmeasurable states, uncertainties and external disturbances. To estimate these latter effectively, a time delay estimation technique is used. The proposed control architecture consists of inner and outer loops. The inner current control loop is based on a robust discrete-time sliding mode controller combined with a time delay estimation method. As said before, the objective of the time delay estimation is to reconstruct the unmeasurable states and uncertainties, while the sliding mode aims is to suppress the estimation error, to ensure robustness and finite-time convergence of the stator currents to their desired references. The outer loop is based on a proportional-integral controller to control the speed. The stability of the current closed-loop system is proven by establishing sufficient conditions on the switching gains. Experimental work has been conducted to verify the performance and the effectiveness of the proposed robust control scheme for a six-phase induction motor drive. The results obtained have shown that the proposed method allows good performances in terms of current tracking, in their corresponding planes. View Full-Text
Keywords: multiphase induction machine; time delay estimation; sliding mode control; field-oriented control; current control multiphase induction machine; time delay estimation; sliding mode control; field-oriented control; current control
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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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Kali, Y.; Ayala, M.; Rodas, J.; Saad, M.; Doval-Gandoy, J.; Gregor, R.; Benjelloun, K. Current Control of a Six-Phase Induction Machine Drive Based on Discrete-Time Sliding Mode with Time Delay Estimation. Energies 2019, 12, 170.

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