A Rewound Five-Phase Synchronous Reluctance Machine: Operating Voltage, Inductance Analysis and Comparison with Conventional Multiphase Machines

In the recent literature, a rewinding approach was proposed to construct a rewound five-phase machine with either star-connected or combined star-pentagon winding using existing off-the-shelf three-phase stator frames. The power per phase drops by a factor of 3/5 in the five-phase machine compared t...

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Veröffentlicht in:IEEE transactions on industry applications 2024-01, Vol.60 (1), p.1-15
Hauptverfasser: Tawfiq, Kotb B., Abdel-Khalik, Ayman S., Ibrahim, Mohamed N., EL-Refaie, Ayman M., Sergeant, Peter
Format: Artikel
Sprache:eng
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Zusammenfassung:In the recent literature, a rewinding approach was proposed to construct a rewound five-phase machine with either star-connected or combined star-pentagon winding using existing off-the-shelf three-phase stator frames. The power per phase drops by a factor of 3/5 in the five-phase machine compared to the three-phase machine. This indicates that either the rated current or voltage must be rescaled. The two options are compared in terms of drive cost and performance. The constant current - reduced voltage option is analytically investigated to determine whether reducing the operating voltage affects the operating speed/output power or not. The second contribution of this work is to determine the optimal slot/pole combinations of the existing off-the-shelf three-phase stators that ensure balanced five-phase star-connected and/or combined star-pentagon windings. This has been done by comparing the harmonic mapping of the rewound machines for different slots/poles combination with the conventional five-phase machines using standard vector-space-decomposition. In addition, the leakage inductance mismatch for different slots/poles combinations of the rewound five-phase machines has been compared to the standard conventional five-phase machines. The last contribution of this paper is to compare the performance of the rewound combined star-pentagon winding with an optimally designed conventional symmetrical one (60-slots/4-poles). This has been done using 2D Ansys Maxwell transient simulation. Finally, experimental results are used to support the theoretical and analytical conclusions.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2023.3275127