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Loss mitigation techniques for a novel toroidal permanent magnet motor

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1109/ECCE47101.2021.9595226
AuthorSearch for: 1; Search for: 1; Search for: 1
Affiliation
  1. National Research Council Canada. Automotive and Surface Transportation
FormatText, Article
Conference2021 IEEE Energy Conversion Congress and Exposition (ECCE), October 10-14, 2021, Vancouver, BC, Canada
Subjectpermanent magnet motor; high torque density motor; high power density motor; aerospace motor; spoke type permanent magnet motor; concentrated windings; soft magnetic composite; SMC; 3D finite element analysis; magnetic flux; torque; windings; toroidal magnetic fields; stator windings; rotors
Abstract
This paper analyzes the losses of a high torque density toroidal permanent magnet motor has. The motor has a rotor wrapping around the stator in a circular shape in order to maximize the electromagnetic interaction with in the motor volume. The toroidal motor is simulated using 3D finite element analysis and the results show that the proposed configuration can achieve torque densities higher than radial and axial flux permanent magnet machines. However, it also has high magnet eddy current losses that could potentially limit the machine efficiency and reliability. Several techniques for magnet loss reduction are proposed including magnet orientation, material composition, position, and segmentation as well as winding configuration. These modifications led to a high efficiency - high torque density toroidal motor with only 1.3% of the magnet eddy current loss of the original design.
Publication date
PublisherIEEE
In
  • 2021 IEEE Energy Conversion Congress and Exposition (ECCE), 9595226 (10 October 2021): 3881–3886.
LanguageEnglish
Peer reviewedYes
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Record identifieraac0afd3-13fb-4ef6-8e40-5f266e612626
Record created2023-01-23
Record modified2023-01-23
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