Hybrid magnet configuration to reduce the content of rare earth elements in a PM-synrel machine

R. M. Ram Kumar, Gaurang Vakil, David Gerada, Chris Gerada, Krzysztof Paciura, B. G. Fernandes, Liang Yan

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

An electric drive with reduced content of rare earth magnets is sought after by the manufacturers of electric vehicles (EVs). A ferrite based permanent magnet assisted synchronous reluctance (PM-SynRel) machine has emerged as a viable alternative to curtail the dependence on NdFeB PM. However, inadequate torque density and demagnetization withstand capability of these machines prevent them from being used in EVs. This paper aims at identifying topologies of PM-SynRel machine which exhibits adequate torque density and demagnetization withstand capability with reduced rare earth content. Tandem arrangement of NdFeB and ferrite PMs in the flux barriers reduces rare earth content and improves demagnetization withstand capability without a significant change in output torque. Based on this, NdFeB-Ferrite-NdFeB (NFN) and FNN topologies of PM-SynRel machine are deduced as favourable choices for the EV sector. Finally, a multiphysics optimization is implemented to ascertain the performance of both NFN and FNN topologies.

Original languageEnglish
Title of host publication2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages352-357
Number of pages6
ISBN (Electronic)9781728146294
DOIs
Publication statusPublished - Jun 2020
Externally publishedYes
Event2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020 - Chicago, United States
Duration: 23 Jun 202026 Jun 2020

Publication series

Name2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020

Conference

Conference2020 IEEE Transportation Electrification Conference and Expo, ITEC 2020
Country/TerritoryUnited States
CityChicago
Period23/06/2026/06/20

Keywords

  • Demagnetization
  • Ferrite PM
  • Hybrid PM-SynRel
  • NdFeB

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Automotive Engineering
  • Transportation

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