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Optimal Design of an Interior Permanent Magnet Synchronous Motor with Cobalt Iron Core

Author

Listed:
  • Pedro P. C. Bhagubai

    (IDMEC, Instituto Superior Técnico, University of Lisboa, 1049-001 Lisboa, Portugal)

  • Luís F. D. Bucho

    (IDMEC, Instituto Superior Técnico, University of Lisboa, 1049-001 Lisboa, Portugal)

  • João F. P. Fernandes

    (IDMEC, Instituto Superior Técnico, University of Lisboa, 1049-001 Lisboa, Portugal)

  • P. J. Costa Branco

    (IDMEC, Instituto Superior Técnico, University of Lisboa, 1049-001 Lisboa, Portugal)

Abstract

The use of a cobalt-iron (VaCoFe) core is investigated as an alternative to silicon-iron (FeSi) in the design of interior permanent magnet synchronous motors (IPMSM). Considering VaCoFe and FeSi cores, a spoke-type IPMSM geometry is optimized for a torque range up to 40 N·m, providing a general comparative analysis between materials. This is done considering the application of a four-motor competition vehicle’s powertrain. A genetic optimization algorithm is coupled to the motor’s electromagnetic and thermal hybrid analytical/finite-element model to provide sufficiently accurate results within a feasible time. VaCoFe allows an estimated increase of up to 64% in torque for the same efficiency level, or up to 5% in efficiency for the same torque. After optimization and using a detailed time-dependent model, a potential 3.2% increase in efficiency, a core weight reduction of 4.1%, and a decrease of 9.6% in the motor’s core volume were found for the VaCoFe at 20 N·m. In addition, for the same motor volume, the VaCoFe allows an increase of 51.9% in torque with an increase of 1.1% in efficiency when compared with FeSi.

Suggested Citation

  • Pedro P. C. Bhagubai & Luís F. D. Bucho & João F. P. Fernandes & P. J. Costa Branco, 2022. "Optimal Design of an Interior Permanent Magnet Synchronous Motor with Cobalt Iron Core," Energies, MDPI, vol. 15(8), pages 1-21, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:8:p:2882-:d:794153
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    References listed on IDEAS

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    1. Pedro P. C. Bhagubai & João G. Sarrico & João F. P. Fernandes & P. J. Costa Branco, 2020. "Design, Multi-Objective Optimization, and Prototyping of a 20 kW 8000 rpm Permanent Magnet Synchronous Motor for a Competition Electric Vehicle," Energies, MDPI, vol. 13(10), pages 1-24, May.
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