Reduction in Eddy Current Loss of Concentrated Windings in High-power Density IPMSM Using Rectangular Windings

Shinnosuke Kajii, Masatsugu Takemoto, Takehiro Jikumaru, Fuminori Suzuki, Satoshi Ogasawara, Koji Orikawa

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

Abstract

Researches on more electric aircraft (MEA) are actively conducted. It is necessary for realizing MEA to meet aircraft application requirements: high ability, high availability, and high-power density, while aiming to reduce weight and environmental impact. For example, interior permanent magnet synchronous motors (IPMSMs) are expected to be used for aircraft applications of MEA, because IPMSMs can achieve both high-power density and high efficiency at high speed and high torque area compared to other types such as induction motors. In general, IPMSMs with concentrated winding structure are available to utilize limited space effectively. Rectangular windings allow high winding factor and realizing more high-power density motors, whereas eddy current loss in rectangular windings is much higher than that in round windings. In this paper, high-power density concentrated winding IPMSMs that employ rectangular windings are discussed. We have examined three improvements for a reduction of the eddy current loss in the rectangular windings to attain continuous operation with high-power density in this motor. In order to reduce the eddy current loss in the windings situated in front of the rotor, we adopted an asymmetric tooth-tip. Moreover, an adequate groove shape between tooth and stator yoke allows to reduce the eddy current loss in stator yoke side windings. Windings, which have optimized unequal cross-sectional area, offer to reduce whole winding loss. Finally, we present a proposed motor employing the three improvements.

Original languageEnglish
Title of host publicationProceedings - 2021 22nd IEEE International Conference on Industrial Technology, ICIT 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages221-227
Number of pages7
ISBN (Electronic)9781728157306
DOIs
Publication statusPublished - Mar 10 2021
Event22nd IEEE International Conference on Industrial Technology, ICIT 2021 - Valencia, Spain
Duration: Mar 10 2021Mar 12 2021

Publication series

NameProceedings of the IEEE International Conference on Industrial Technology
Volume2021-March

Conference

Conference22nd IEEE International Conference on Industrial Technology, ICIT 2021
Country/TerritorySpain
CityValencia
Period3/10/213/12/21

Keywords

  • asymmetric tooth-tip
  • high power density motor
  • IPMSM
  • rectangular winding

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

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