Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives
Multiphase drives exhibit remarkable advantages (e.g., fault tolerance) over three-phase ones. Six-phase drives are particularly attractive, given their moderate complexity and suitability for off-the-shelf three-phase converters. Regarding the stator winding arrangement, the symmetrical one offers...
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my.um.eprints.391392023-11-29T09:14:44Z http://eprints.um.edu.my/39139/ Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives Yepes, Alejandro G. Abdel-Azim, Wessam E. Shawier, Abdullah Abdel-Majeed, Mahmoud Said Che, Hang Seng Abdel-Khalik, Ayman Samy Ahmed, Shehab Doval-Gandoy, Jesus TK Electrical engineering. Electronics Nuclear engineering Multiphase drives exhibit remarkable advantages (e.g., fault tolerance) over three-phase ones. Six-phase drives are particularly attractive, given their moderate complexity and suitability for off-the-shelf three-phase converters. Regarding the stator winding arrangement, the symmetrical one offers superior postfault capabilities in most scenarios. On the other hand, resistance asymmetry in the stator phases or connections may arise due to different causes. The conventional full-range minimum-loss strategy (FRMLS) generates stator-current references under open-phase (infinite resistance) faults so that torque ripple is prevented while minimizing the losses for each torque (d-q current) value and maximizing the torque range; however, this method is unsuitable for unequal resistances of finite value. This article proposes an FRMLS for setting the current references to reach these goals in symmetrical six-phase drives with any resistance asymmetry. The optimum references are found online depending on the resistances, without lookup tables. The phase currents are individually limited by an iterative algorithm, so that minimum stator copper loss (SCL) is achieved over the maximum admissible torque range. In this manner, unlike the conventional FRMLS, minimum SCL and maximum torque range are attained even for finite resistance imbalance. The currents in phases affected by high resistances are suitably reduced. Experimental results are provided. Institute of Electrical and Electronics Engineers 2023-01 Article PeerReviewed Yepes, Alejandro G. and Abdel-Azim, Wessam E. and Shawier, Abdullah and Abdel-Majeed, Mahmoud Said and Che, Hang Seng and Abdel-Khalik, Ayman Samy and Ahmed, Shehab and Doval-Gandoy, Jesus (2023) Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives. IEEE Transactions on Power Electronics, 38 (1). pp. 151-164. ISSN 0885-8993, DOI https://doi.org/10.1109/TPEL.2022.3204911 <https://doi.org/10.1109/TPEL.2022.3204911>. 10.1109/TPEL.2022.3204911 |
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TK Electrical engineering. Electronics Nuclear engineering Yepes, Alejandro G. Abdel-Azim, Wessam E. Shawier, Abdullah Abdel-Majeed, Mahmoud Said Che, Hang Seng Abdel-Khalik, Ayman Samy Ahmed, Shehab Doval-Gandoy, Jesus Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives |
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Multiphase drives exhibit remarkable advantages (e.g., fault tolerance) over three-phase ones. Six-phase drives are particularly attractive, given their moderate complexity and suitability for off-the-shelf three-phase converters. Regarding the stator winding arrangement, the symmetrical one offers superior postfault capabilities in most scenarios. On the other hand, resistance asymmetry in the stator phases or connections may arise due to different causes. The conventional full-range minimum-loss strategy (FRMLS) generates stator-current references under open-phase (infinite resistance) faults so that torque ripple is prevented while minimizing the losses for each torque (d-q current) value and maximizing the torque range; however, this method is unsuitable for unequal resistances of finite value. This article proposes an FRMLS for setting the current references to reach these goals in symmetrical six-phase drives with any resistance asymmetry. The optimum references are found online depending on the resistances, without lookup tables. The phase currents are individually limited by an iterative algorithm, so that minimum stator copper loss (SCL) is achieved over the maximum admissible torque range. In this manner, unlike the conventional FRMLS, minimum SCL and maximum torque range are attained even for finite resistance imbalance. The currents in phases affected by high resistances are suitably reduced. Experimental results are provided. |
format |
Article |
author |
Yepes, Alejandro G. Abdel-Azim, Wessam E. Shawier, Abdullah Abdel-Majeed, Mahmoud Said Che, Hang Seng Abdel-Khalik, Ayman Samy Ahmed, Shehab Doval-Gandoy, Jesus |
author_facet |
Yepes, Alejandro G. Abdel-Azim, Wessam E. Shawier, Abdullah Abdel-Majeed, Mahmoud Said Che, Hang Seng Abdel-Khalik, Ayman Samy Ahmed, Shehab Doval-Gandoy, Jesus |
author_sort |
Yepes, Alejandro G. |
title |
Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives |
title_short |
Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives |
title_full |
Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives |
title_fullStr |
Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives |
title_full_unstemmed |
Online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase AC drives |
title_sort |
online control strategy for tolerating resistance asymmetry with minimum copper loss in the full torque range for symmetrical six-phase ac drives |
publisher |
Institute of Electrical and Electronics Engineers |
publishDate |
2023 |
url |
http://eprints.um.edu.my/39139/ |
_version_ |
1783945857297547264 |
score |
13.18916 |