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The Influence of Permanent Magnet Material Properties on Generator Rotor Design

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  • Petter Eklund

    (Division of Electricity, Uppsala University, SE-751 05 Uppsala, Sweden)

  • Sandra Eriksson

    (Division of Electricity, Uppsala University, SE-751 05 Uppsala, Sweden)

Abstract

Due to the price and supply insecurities for rare earth metal-based permanent magnet (PM) materials, a search for new PM materials is ongoing. The properties of a new PM material are not known yet, but a span of likely parameters can be studied. This paper presents an investigation on how the remanence and recoil permeability of a PM material affect its usefulness in a low speed, multi-pole, and PM synchronous generator. Demagnetisation is also considered. The investigation is carried out by constrained optimisation of three different rotor topologies for maximum torque production for different PM material parameters and a fixed PM maximum energy. The rotor topologies used are surface mounted PM rotor, spoke type PM rotor and an interior PM rotor with radially magnetised PMs. The three different rotor topologies have their best performance for different kinds of materials. The spoke type PM rotor is the best at utilising low remanence materials as long as they are sufficiently resistant to demagnetisation. The surface mounted PM rotor works best with very demagnetisation resistant PM materials with a high remanence, while the radial interior PM rotor is preferable for high remanence materials with low demagnetisation resistance.

Suggested Citation

  • Petter Eklund & Sandra Eriksson, 2019. "The Influence of Permanent Magnet Material Properties on Generator Rotor Design," Energies, MDPI, vol. 12(7), pages 1-19, April.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:7:p:1314-:d:220362
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    References listed on IDEAS

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    1. Marcel Torrent & José Ignacio Perat & José Antonio Jiménez, 2018. "Permanent Magnet Synchronous Motor with Different Rotor Structures for Traction Motor in High Speed Trains," Energies, MDPI, vol. 11(6), pages 1-17, June.
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    Cited by:

    1. Sofia Kontos & Anar Ibrayeva & Jennifer Leijon & Gustav Mörée & Anna E. Frost & Linus Schönström & Klas Gunnarsson & Peter Svedlindh & Mats Leijon & Sandra Eriksson, 2020. "An Overview of MnAl Permanent Magnets with a Study on Their Potential in Electrical Machines," Energies, MDPI, vol. 13(21), pages 1-14, October.
    2. Liyan Guo & Zhongyuan Hao & Jiaqi Xu & Huimin Wang & Xinmin Li & Shuang Wu, 2022. "Design and Analysis of Modulated Magnetic Pole for Dual Three-Phase Surface-Mounted Permanent Magnet Synchronous Motor," Energies, MDPI, vol. 15(13), pages 1-19, June.
    3. Reza Jafari & Pedram Asef & Mohammad Ardebili & Mohammad Mahdi Derakhshani, 2022. "Linear Permanent Magnet Vernier Generators for Wave Energy Applications: Analysis, Challenges, and Opportunities," Sustainability, MDPI, vol. 14(17), pages 1-35, September.
    4. Sandra Eriksson, 2019. "Permanent Magnet Synchronous Machines," Energies, MDPI, vol. 12(14), pages 1-5, July.
    5. Jonathan Sjölund & Sandra Eriksson, 2021. "Effect of Pole Shoe Design on Inclination Angle of Different Magnetic Fields in Permanent Magnet Machines," Energies, MDPI, vol. 14(9), pages 1-15, April.
    6. Amina Bensalah & Georges Barakat & Yacine Amara, 2022. "Electrical Generators for Large Wind Turbine: Trends and Challenges," Energies, MDPI, vol. 15(18), pages 1-36, September.
    7. Anna Przybył & Piotr Gębara & Roman Gozdur & Krzysztof Chwastek, 2022. "Modeling of Magnetic Properties of Rare-Earth Hard Magnets," Energies, MDPI, vol. 15(21), pages 1-18, October.

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