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Sensorless Control of a Fault Tolerant Multi-level Inverter PMSM Drives in Case of an Open Circuit Fault

Saleh, Kamel; Sumner, Mark


Kamel Saleh

Professor of Electrical Energy Systems


© 2018 IEEE. This paper introduces a fault tolerant multi-level inverter PMSM Drive that is capable to work in case of a single phase open circuit fault without degrading the system performance. Moreover, it can work in sensorless mode in case of an open circuit fault with the same performance as in sensor mode. The permanent magnet synchronous motor (PMSM) is fed by a 4-leg asymmetric cascaded H-Bridges multi-level inverter. The fourth leg is activated in case of an open circuit only to maintain the system performance. The reliability of the system is additionally enhanced by adopting a new method to track saliency position in case of an open circuit fault to make the system work in sensorless mode. The saliency position is obtained through measuring the dynamic current response of the healthy motor line currents due to the insulated-gate bipolar transistor (IGBT) switching actions. The new strategy includes software modifications only to the saliency tracking algorithm used in healthy mode in order to make it applicable to the reconfigured multi-level inverter in the presence of a fault. It uses only the fundamental pulse width modulation (PWM) waveform (i.e. there is no modification to the operation of the 4-leg multi-level inverter), similar to the fundamental PWM method proposed for a 3-leg multi-level inverter. Simulation results are provided to verify the effectiveness of the proposed strategy over a wide range of speeds in the case of a single-phase open circuit fault.


Saleh, K., & Sumner, M. (2018). Sensorless Control of a Fault Tolerant Multi-level Inverter PMSM Drives in Case of an Open Circuit Fault. .

Conference Name 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)
Conference Location Almafi Coast, Italy
Start Date Jun 20, 2018
End Date Jun 22, 2018
Acceptance Date Feb 28, 2018
Online Publication Date Aug 27, 2018
Publication Date Jun 20, 2018
Deposit Date Nov 30, 2018
Publicly Available Date Dec 3, 2018
Publisher Institute of Electrical and Electronics Engineers
Pages 883-888
ISBN 9781538649428
Keywords Four-leg multi-leve; Sensorless; Single-phase open circuit; Space vector pulse width modulation
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Additional Information © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.


Sensorless Control Of A Fault Tolerant Multi-level Inverter PMSM Drives In Case Of An Open Circuit Fault (<nobr>1.1 Mb</nobr>)

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