LAPSE:2023.28873
Published Article
LAPSE:2023.28873
Open-Circuit Fault-Tolerant Control of Multi-Phase PM Machines by Compensating the d-q Axes Currents
Ali Akay, Paul Lefley
April 12, 2023
This paper presents a novel method to control sinusoidal distributed winding or sinusoidal back electromotive force (back-EMF) multi-phase permanent magnet (PM) machines under open-circuit fault conditions. In this study, five different fault conditions are considered: single-phase, adjacent double-phase, non-adjacent double-phase, adjacent three-phase, and non-adjacent three-phase open circuit conditions. New current sets for the remaining healthy phase under open-circuit fault conditions are obtained by compensating the direct-quadrature (d-q) axes currents. For this purpose, an iterative method has been used to get the new set of currents. D-q axes currents, due to faulty phase/phases, are shared to the healthy phases to obtain the same d-q axes currents as in the healthy condition. Therefore, the same torque is produced as in the healthy condition. The developed method is simulated in MATLAB/Simulink by using a d-q modelled sinusoidal back-EMF five-phase machine. A vector control block diagram has been designed to run the machine under healthy and faulty conditions. The machine model has been run successfully under fault tolerant conditions. Additionally, a finite element analysis (FEA) has been undertaken to simulate the five-phase PM model machine by using MagNet software. Open-circuit fault-tolerant control currents are fed into the coils of the machine model. Satisfactory torque results have been obtained. Because the model five-phase PM machine includes higher order back-EMF harmonics, especially the third harmonic, torque has ripple due to interaction between the fault-tolerant control currents and the higher order back-EMF harmonics.
Keywords
five-phase machine, multi-phase machines, open-circuit fault-tolerant, permanent magnet machines
Subject
Suggested Citation
Akay A, Lefley P. Open-Circuit Fault-Tolerant Control of Multi-Phase PM Machines by Compensating the d-q Axes Currents. (2023). LAPSE:2023.28873
Author Affiliations
Akay A: School of Engineering, University of Leicester, Leicester LE1 7RH, UK
Lefley P: School of Engineering, University of Leicester, Leicester LE1 7RH, UK
Journal Name
Energies
Volume
14
Issue
1
Article Number
E192
Year
2021
Publication Date
2021-01-01
Published Version
ISSN
1996-1073
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Original Submission
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PII: en14010192, Publication Type: Journal Article
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LAPSE:2023.28873
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doi:10.3390/en14010192
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Apr 12, 2023
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CC BY 4.0
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