Optimal design of outer rotor interior permanent magnet synchronous machine with hybrid permanent magnet

Dong Yu, Xiaoyan Huang, Xiaochen Zhang, Jian Zhang, Qinfen Lu, Youtong Fang

Research output: Journal PublicationArticlepeer-review

9 Citations (Scopus)

Abstract

In this paper, an outer rotor interior permanent magnet synchronous machine (IPMSM) with hybrid permanent magnet (PM) material is proposed. The key is to adopt the outer rotor structure with two-layer crescent barriers and hybrid PM material to maximize the output torque and reduce the usage of high-cost rare-earth PM. The ferrite PMs are filled in the middle of the crescent barriers with thicker thickness, while the rare-earth PMs are filled into the bilateral of the crescent barriers with thinner thickness. To verify the effectiveness of the proposed rotor structure, optimizations are first carried out among the conventional rotor structures with single kind of PM material and the proposed rotor structure with hybrid PMs. Then, detailed comparisons have been investigated. Results indicate that the proposed machine has higher torque density than the machine with only ferrite PM and can reduce almost half the usage of rare-earth PM in comparison to the machine with only rare-earth PM. Moreover, the proposed rotor structure is further optimized considering productivity.

Original languageEnglish
Article number8626473
JournalIEEE Transactions on Applied Superconductivity
Volume29
Issue number2
DOIs
Publication statusPublished - Mar 2019
Externally publishedYes

Keywords

  • hybrid PM
  • IPMSM
  • optimization
  • Outer rotor
  • PM usage
  • power factor
  • reluctance torque

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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