Hoang, K. orcid.org/0000-0001-7463-9681 and Zhu, Z.Q. (2016) Comparative performance study of alternate fault-tolerant inverter configurations for direct torque control-based three-phase PM BLAC drives under single-phase open-circuit fault. In: 8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016). IET international conference on Power Electronics, Machines and Drives, 19-21 Apr 2016, Glasgow, UK. IET ISBN 978-1-78561-188-9
Abstract
This paper presents a comparative performance study of three typical fault-tolerant control (FTC) topologies [split-capacitor (SC), extra-leg split-capacitor (ELSC), and extra-leg extraswitch (ELES)] for direct torque control (DTC)-based threephase permanent magnet (PM) brushless AC (BLAC) drives under single-phase open-circuit fault (SOF). The advantages and limitations of these FTC schemes are theoretically compared and empirically validated. To achieve reliable postfault operations, control issues associated with VM-based flux estimators employed for DTC-based BLAC drives under SOF are demonstrated and relevant remedies are proposed. It is shown that although the ELES scheme can maintain the normal based speed, 6 of its 8 switching states cause phaseto-neutral short circuit in one or both two remaining phase windings resulting in high current harmonic values. Besides, during its implementation, the full DC-link voltage value is always applied to the non-short circuit phase windings leading to high possibility of winding insulation damage. Thus, for a compromise of the normal based speed by a factor of 3/2 , the ELSC drive should be used to avoid these issues. Furthermore, in the low-speed region up to half of the rated speed, the lowest copper loss, current harmonics, and torque ripples can be obtained by utilizing the SC drive.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Institution of Engineering and Technology . This is an author produced version of a paper subsequently published in 8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016). Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 19 May 2016 14:50 |
Last Modified: | 19 Dec 2022 13:33 |
Published Version: | http://dx.doi.org/10.1049/cp.2016.0193 |
Status: | Published |
Publisher: | IET |
Refereed: | Yes |
Identification Number: | 10.1049/cp.2016.0193 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99726 |