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Finite element analysis and experimental validation of loss reduction strategies in synchronous reluctance motors with combined star delta winding

Finite Elemente-Analyse und experimentelle Überprüfung von Verlust-Reduktionsstrategien in Synchronreluktanz-Motoren mit kombinierter Stern Dreieck-Wicklung

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Abstract

This paper investigates a combined star delta winding for a synchronous reluctance motor and compares it with a standard star winding. Finite element analysis shows that with this winding d‑ and q‑axes inductances increase, which leads to a higher torque density and offers different possibilities to reduce losses. A test method for loss separation to verify the theoretical findings is presented and corresponding results are shown. Furthermore, the problem of circulating currents in the delta part of the winding is discussed.

Zusammenfassung

Dieser Beitrag untersucht eine kombinierte Stern Dreieck-Wicklung eines Synchronreluktanz-Motors und vergleicht diese mit einer Standardwicklung in Sternschaltung. Finite Elemente-Analysen zeigen, dass mit dieser Wicklung die d‑ und q‑Achsen-Induktivitäten steigen, was zu einer höheren Drehmomentdichte führt und verschiedene Möglichkeiten eröffnet, um Verluste zu reduzieren. Ein Messverfahren zur Verifikation der theoretischen Erkenntnisse wird präsentiert und entsprechende Ergebnisse werden gezeigt. Außerdem wird das Problem von Kreisströmen in der Teilwicklung in Dreieckschaltung diskutiert.

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Acknowledgements

The authors thank Deutsche Forschungsgemeinschaft (DFG) for the generous support under project number HO1483/71‑2 and Herbert Krug Elektromotoren for manufacturing the prototype.

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  1. ETI, Elektrische Maschinen und Antriebe, Technische Universität Dresden, Helmholtzstraße 9, 01069, Dresden, Germany

    Tobias Knapp & Wilfried Hofmann

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  1. Tobias Knapp
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  2. Wilfried Hofmann
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Correspondence to Tobias Knapp.

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Knapp, T., Hofmann, W. Finite element analysis and experimental validation of loss reduction strategies in synchronous reluctance motors with combined star delta winding. Elektrotech. Inftech. 141, 113–123 (2024). https://doi.org/10.1007/s00502-024-01208-x

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  • DOI: https://doi.org/10.1007/s00502-024-01208-x

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