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Quantitative comparisons of six-phase outer-rotor permanent-magnet brushless machines for electric vehicles

  • Yuqing Yao
  • , Chunhua Liu*
  • , Christopher H.T. Lee
  • *Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

72 Downloads (CityUHK Scholars)

Abstract

Multiphase machines have some distinct merits, including the high power density, high torque density, high efficiency and low torque ripple, etc. which can be beneficial for many industrial applications. This paper presents four different types of six-phase outer-rotor permanent-magnet (PM) brushless machines for electric vehicles (EVs), which include the inserted PM (IPM) type, surface PM (SPM) type, PM flux-switching (PMFS) type, and PM vernier (PMV) type. First, the design criteria and operation principle are compared and discussed. Then, their key characteristics are addressed and analyzed by using the finite element method (FEM). The results show that the PMV type is quite suitable for the direct-drive application for EVs with its high torque density and efficiency. Also, the IPM type is suitable for the indirect-drive application for EVs with its high power density and efficiency.
Original languageEnglish
Article number2141
Number of pages18
JournalEnergies
Volume11
Issue number8
Online published16 Aug 2018
DOIs
Publication statusPublished - Aug 2018

Research Keywords

  • Brushless machine
  • Electric vehicle
  • Flux switching machine
  • Multiphase machine
  • Outer rotor
  • Permanent-magnet machine
  • Vernier machine

Publisher's Copyright Statement

  • This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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