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Performance Comparison of Conventional Synchronous Reluctance Machines and PM-Assisted Types with Combined Star–Delta Winding

Author

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  • Mohamed Nabil Fathy Ibrahim

    (Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Ghent University, 9000 Ghent, Belgium
    Electrical Engineering Department, Kafrelshiekh University, Kafr El-Sheikh 33511, Egypt)

  • Essam Rashad

    (Electrical Power and Machines Department, Tanta University, Tanta 31527, Egypt)

  • Peter Sergeant

    (Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Ghent University, 9000 Ghent, Belgium
    Flanders Make, The Strategic Research Center for the Manufacturing Industry, B-8500 Kortrijk, Belgium)

Abstract

This paper compares four prototype Synchronous Reluctance Motors (SynRMs) having an identical geometry of iron lamination stacks in the stator and rotor. Two different stator winding layouts are employed: a conventional three-phase star connection and a combined star–delta winding. In addition, two rotors are considered: a conventional rotor without magnets and a rotor with ferrite magnets. The performance of the four SynRMs is evaluated using a two-dimensional (2D) Finite Element Model (FEM). For the same copper volume and current, the combined star–delta-connected stator with Permanent Magnets (PMs) in the rotor corresponds to an approximately 22% increase in the output torque at rated current and speed compared to the conventional machine. This improvement is mainly thanks to adding ferrite PMs in the rotor as well as to the improved winding factor of the combined star–delta winding. The torque gain increases up to 150% for low current. Moreover, the rated efficiency is 93.60% compared to 92.10% for the conventional machine. On the other hand, the impact on the power factor and losses of SynRM when using the star–delta windings instead of the star windings is merely negligible. The theoretical results are experimentally validated using four identical prototype machines with identical lamination stacks but different rotors and winding layouts.

Suggested Citation

  • Mohamed Nabil Fathy Ibrahim & Essam Rashad & Peter Sergeant, 2017. "Performance Comparison of Conventional Synchronous Reluctance Machines and PM-Assisted Types with Combined Star–Delta Winding," Energies, MDPI, vol. 10(10), pages 1-18, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1500-:d:113431
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    Citations

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    Cited by:

    1. Hamidreza Heidari & Anton Rassõlkin & Ants Kallaste & Toomas Vaimann & Ekaterina Andriushchenko & Anouar Belahcen & Dmitry V. Lukichev, 2021. "A Review of Synchronous Reluctance Motor-Drive Advancements," Sustainability, MDPI, vol. 13(2), pages 1-37, January.
    2. Duc-Kien Ngo & Min-Fu Hsieh, 2019. "Performance Analysis of Synchronous Reluctance Motor with Limited Amount of Permanent Magnet," Energies, MDPI, vol. 12(18), pages 1-20, September.
    3. Mariusz Korkosz & Jan Prokop & Bartlomiej Pakla & Grzegorz Podskarbi & Piotr Bogusz, 2020. "Analysis of Open-Circuit Fault in Fault-Tolerant BLDC Motors with Different Winding Configurations," Energies, MDPI, vol. 13(20), pages 1-27, October.
    4. Chih-Hong Lin & Chang-Chou Hwang, 2018. "High Performances Design of a Six-Phase Synchronous Reluctance Motor Using Multi-Objective Optimization with Altered Bee Colony Optimization and Taguchi Method," Energies, MDPI, vol. 11(10), pages 1-14, October.
    5. Armagan Bozkurt & Ahmet Fevzi Baba & Yusuf Oner, 2021. "Design of Outer-Rotor Permanent-Magnet-Assisted Synchronous Reluctance Motor for Electric Vehicles," Energies, MDPI, vol. 14(13), pages 1-12, June.

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