A ferrite permanent magnet axial gap motor with segmented rotor structure for the next generation hybrid vehicle

Takahiko Miura, Shinji Chino, Masatsugu Takemoto, Satoshi Ogasawara, Akira Chiba, Nobukazu Hoshi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

43 Citations (Scopus)

Abstract

Permanent magnet synchronous motors (PMSMs) are a key part of the current hybrid electric vehicle (HEV) drive system, and the sophisticated performance such as small size, high power density, and high efficiency is required to the PMSMs in the HEV drive system. Therefore, rare earth permanent magnet is generally employed in the PMSMs in order to satisfy those demands. However, rare earth materials contained in the rare earth permanent magnet have several concerns caused by uneven distribution, because the rare earth materials such as neodymium and dysprosium depend on China for 90% or more of the world share. Accordingly, the rare earth materials have the undeniable possibility of sudden rise of price or reinforcement of export restriction. On the other hand, the HEVs tend to be promoted rapidly because of growing concern about environmental problems. Therefore, it is very important to develop rare-earth-free motors for the next generation HEV drive system. This paper proposes a ferrite permanent magnet axial gap motor without the rare earth materials for the HEVs. In addition, the proposed motor structure and the analytical results with the 3D-FEA are introduced.

Original languageEnglish
Title of host publication19th International Conference on Electrical Machines, ICEM 2010
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event19th International Conference on Electrical Machines, ICEM 2010 - Rome, Italy
Duration: Sep 6 2010Sep 8 2010

Publication series

Name19th International Conference on Electrical Machines, ICEM 2010

Conference

Conference19th International Conference on Electrical Machines, ICEM 2010
CountryItaly
CityRome
Period9/6/109/8/10

Keywords

  • Axial gap motors
  • Ferrite permanent magnets
  • Hybrid electric vehicles (HEVs)
  • Permanent magnet synchronous motors
  • Rare-earth-free motors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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