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Analysis and Design of Innovative Magnetic Wedges for High Efficiency Permanent Magnet Synchronous Machines

Author

Listed:
  • Lucia Frosini

    (Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Via Ferrata 5, 27100 Pavia, Italy)

  • Marco Pastura

    (Department of Engineering Enzo Ferrari, University of Modena and Reggio Emilia, Via P. Vivarelli 10, 41125 Modena, Italy)

Abstract

The global decarbonization targets require increasingly higher levels of efficiency from the designers of electrical machines. In this context, the opportunity to employ magnetic or semi-magnetic wedges in surface-mounted permanent magnet machines with fractional-slot concentrated winding has been evaluated in this paper, with the aim to reduce the power losses, especially in the magnets. Since an analytical calculation is not sufficient for this evaluation, finite element methods with two different software have been employed, by using a model experimentally validated on a real motor. The effects of wedges with different values of permeability and different magnetization characteristics have been evaluated on flux density, back electromotive force, and inductances, in order to choose the more suitable wedge for the considered motor. Furthermore, a new wedge consisting of different portions of materials with different magnetic permeability values is proposed. The effects of both conventional and unconventional magnetic wedges were assessed to optimize the motor performance in all working conditions.

Suggested Citation

  • Lucia Frosini & Marco Pastura, 2020. "Analysis and Design of Innovative Magnetic Wedges for High Efficiency Permanent Magnet Synchronous Machines," Energies, MDPI, vol. 13(1), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:1:p:255-:d:305257
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    Citations

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    Cited by:

    1. Mitsuhide Sato & Keigo Takazawa & Manabu Horiuchi & Ryoken Masuda & Ryo Yoshida & Masami Nirei & Yinggang Bu & Tsutomu Mizuno, 2020. "Reducing Rotor Temperature Rise in Concentrated Winding Motor by Using Magnetic Powder Mixed Resin Ring," Energies, MDPI, vol. 13(24), pages 1-15, December.
    2. Jonathan Muñoz Tabora & Bendict Katukula Tshoombe & Wellington da Silva Fonseca & Maria Emília de Lima Tostes & Edson Ortiz de Matos & Ubiratan Holanda Bezerra & Marcelo de Oliveira e Silva, 2022. "Virtual Modeling and Experimental Validation of the Line-Start Permanent Magnet Motor in the Presence of Harmonics," Energies, MDPI, vol. 15(22), pages 1-17, November.
    3. Dongming Li & Guihong Feng & Wei Li & Bingyi Zhang & Jiaxu Zhang, 2022. "Effect of Stator Slots on Electromagnetic Performance of a High-Voltage Line-Start Permanent Magnet Synchronous Motor," Energies, MDPI, vol. 15(9), pages 1-18, May.

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