A Proposal of Ultra-Flat Axial Gap Motor Employing C-type SMC Core

Ren Tsunata, Masatsugu Takemoto, Satoshi Ogasawara, Tomoyuki Ueno, Tatsuya Saitoh

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

Abstract

In recent years, permanent magnet synchronous motors (PMSMs) are used for many applications because of their high output density and high efficiency. On the other hand, PMSMs having low aspect ratio like flat disk are desired depending on applications. In general, PMSMs employ radial gap structure which has the air gap in radial direction. However, in flat shape, radial gap motors have relatively low torque because their effective surface area of permanent magnet (PM) is small and their coil ends occupy most of the motor volume. Therefore, in flat shape, axial gap structure which has the air gap in axial direction is frequently employed instead of radial gap motors. Since axial gap motors don't have the coil ends in axial direction, they can reduce axial length. Meanwhile, conventional axial gap motors frequently employ double stator structure. Hence, in flatter shape like 'ultra-flat shape', conventional axial gap motors are not suitable because stator back yoke and PM become extremely thin. Instead of those, an axial gap motor employing C-type SMC core is proposed in this paper. Advantages of the proposed axial gap motor using C-type core in ultra-flat shape is illustrated, and then, the proposed motor is analyzed by three-dimensional finite element analysis (3D-FEA).

Original languageEnglish
Title of host publicationProceedings
Subtitle of host publicationIECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society
PublisherIEEE Computer Society
Pages874-879
Number of pages6
ISBN (Electronic)9781728148786
DOIs
Publication statusPublished - Oct 2019
Externally publishedYes
Event45th Annual Conference of the IEEE Industrial Electronics Society, IECON 2019 - Lisbon, Portugal
Duration: Oct 14 2019Oct 17 2019

Publication series

NameIECON Proceedings (Industrial Electronics Conference)
Volume2019-October

Conference

Conference45th Annual Conference of the IEEE Industrial Electronics Society, IECON 2019
CountryPortugal
CityLisbon
Period10/14/1910/17/19

Keywords

  • C-type core
  • Manufacturability
  • axial flux machine
  • axial gap motor
  • eddy current loss
  • neodymium bonded permanent magnet (PM)
  • radial gap motor
  • soft magnetic composite (SMC)
  • torque ripple
  • ultra-flat shape

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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