Rotor structure suppressing suspension force ripple in an IPM type bearingless motor with 2-pole motor windings and 4-pole suspension windings

Tatsuya Matsuzaki, Masatsugu Takemoto, Satoshi Ogasawara, Satoru Ota, Kazunobu Oi, Daiki Matsuhashi

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

3 Citations (Scopus)

Abstract

A bearingless motor has integrated characteristics of an electrical motor and a magnetic bearing. In general, surface permanent magnet (SPM) type rotor structure with a ring magnet magnetized in parallel is employed in high-speed PM type bearingless motors. However, in case of increasing motor size for high output, this rotor structure has problems of insufficient suspension force due to a wide air gap and high cost by using the large-diameter ring magnet magnetized in parallel. Therefore, this paper discusses a novel interior permanent magnet (IPM) type rotor structure for the high-speed and high-output bearingless motor. In the novel IPM type rotor structure, suspension force ripple is suppressed by means of arranging flux barriers at the suitable position in a rotor. It is confirmed with 2D-FEM that the proposed rotor structure using the flux barriers is effective in suppressing the suspension force ripple.

Original languageEnglish
Title of host publicationProceedings - 2012 20th International Conference on Electrical Machines, ICEM 2012
Pages744-750
Number of pages7
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 20th International Conference on Electrical Machines, ICEM 2012 - Marseille, France
Duration: Sep 2 2012Sep 5 2012

Publication series

NameProceedings - 2012 20th International Conference on Electrical Machines, ICEM 2012

Conference

Conference2012 20th International Conference on Electrical Machines, ICEM 2012
Country/TerritoryFrance
CityMarseille
Period9/2/129/5/12

Keywords

  • Bearingless motors
  • highspeed machines
  • magnetic bearings
  • magnetic levitation
  • magnetic suspension
  • suspension force ripple

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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