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Sensorless control of five-phase PMSM drives post the failure in two phases

Saleh, Kamel; Sumner, M.


Kamel Saleh

Professor of Electrical Energy Systems


This paper introduces a novel technique to maintain the operation of the five-phase permanent magnet synchronous motor post the failure in two phases of the motor and post the failure of the speed sensor occurs simultaneously. To achieve that, firstly, a fault-tolerant control (FTC) technique is implemented. The FTC is based on implementing two new space vector pulse width modulation (SVPWM) besides using field-oriented control to minimize the torque ripple and to maintain the performance post the two-phase failure. Secondly, algorithms are proposed to obtain the saliency position post the failure of the two phases. The technique is based on measuring the transient response of the motor’s remaining healthy currents due to the inverter switching actions. These switching actions are related to the PWM signals obtained from the new SVPWM techniques implemented post the two-phase failure. The whole control technique post the failures is very simple to implement. Simulation results are provided to verify the reliability of the proposed control technique to maintain the performance of the five-phase motor drive post the failure in the two phases and the failure of the speed sensor occurred simultaneously without compromising the preperformance (maintain the torque ripple less than 3.6% and 3.4% post the failure). Moreover, the results have demonstrated the ability for the whole system to work effectively over a wide speed range and load conditions post the failure.


Saleh, K., & Sumner, M. (2022). Sensorless control of five-phase PMSM drives post the failure in two phases. Electrical Engineering,

Journal Article Type Article
Acceptance Date Feb 22, 2022
Online Publication Date Mar 22, 2022
Publication Date Mar 22, 2022
Deposit Date Aug 5, 2022
Publicly Available Date Mar 23, 2023
Journal Electrical Engineering
Print ISSN 0948-7921
Electronic ISSN 1432-0487
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Keywords Applied Mathematics; Electrical and Electronic Engineering
Public URL
Publisher URL
Additional Information Received: 1 September 2021; Accepted: 22 February 2022; First Online: 22 March 2022


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