Investigation of Enhancing Output Power Density in Ultra-High-Speed Motors with Concentrated Winding Structure

Takayuki Iida, Masatsugu Takemoto, Satoshi Ogasawra, Koji Orikawa, Ikuya Sato, Hiroyuki Kokubun, Akio Toba, Masao Syuto

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

Abstract

Ultra-high-speed motors has frequently been considered for many applications because to increase rotational speed of motors is effective in improving output power density and reducing motor size. In this paper, a 4-pole ultra-high-speed motor with concentrated winding structure is discussed in order to achieve even higher output power density. However, applying 4-pole magnetization to conventional ultra-high-speed motors using Nd sintered permanent magnet (PM) and concentrated winding structure will extremely increase total loss, total loss density, and especially rotor loss density. Therefore, from the viewpoint of cooling and continuous operation, it is important to propose a 4-pole ultra-high-speed motor with concentrated winding structure that can achieve even higher power density without increasing the total loss density and the rotor loss density. This paper shows that there are four important key points in the motor design to realize the proposed motor. It is found that the proposed motor can accomplish 1.5 times higher output power density without increasing the total loss density and the rotor loss density than the conventional 2-pole ultra-high-speed motor with Nd sintered PM and concentrated winding structure.

Original languageEnglish
Title of host publicationECCE 2020 - IEEE Energy Conversion Congress and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages262-269
Number of pages8
ISBN (Electronic)9781728158266
DOIs
Publication statusPublished - Oct 11 2020
Event12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States
Duration: Oct 11 2020Oct 15 2020

Publication series

NameECCE 2020 - IEEE Energy Conversion Congress and Exposition

Conference

Conference12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
CountryUnited States
CityVirtual, Detroit
Period10/11/2010/15/20

Keywords

  • High output power density
  • Nd bonded magnet
  • Rotor back core
  • Straight teeth structure
  • Ultra-high-speed motors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology

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