2層IPMSMのコギングトルクを低減するための溝を設けたロータ形状の設計手法

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門

発行日: 2020/06/01

タイトル(英語): Design Method of a Rotor Structure with Notch for Reducing the Cogging Torque of a Double-Layered IPMSM

著者名: 小林　眞莉香（大阪府立大学），森本　茂雄（大阪府立大学），真田　雅之（大阪府立大学），井上　征則（大阪府立大学）

著者名(英語): Marika Kobayashi (Osaka Prefecture University), Shigeo Morimoto (Osaka Prefecture University), Masayuki Sanada (Osaka Prefecture University), Yukinori Inoue (Osaka Prefecture University)

キーワード: 埋込磁石同期モータ，コギングトルク，溝，エアギャップ磁束密度　　interior permanent synchronous motor，cogging torque，notch，air-gap flux density

要約(英語): Interior permanent magnet synchronous motor (IPMSM) has the disadvantage of many space-harmonic waves in air-gap flux density, leading to a large cogging torque. This study proposed a design method of a rotor structure with the notch for reducing the cogging torque of a double-layered IPMSM. The proposed method focused on the pulsating component of the cogging torque, which depends on the squared air-gap flux density (Bg2) of the motor. First, we analyzed Bg2 of the motor without the notch using finite-element analysis (FEA), and the waveform of Bg2 was approximated by a step waveform. Then, ideal waveform of Bg2 was obtained theoretically so that the major components of the cogging torque can be zero. Based on the ideal waveform of Bg2, we determined the notch position and width. Finally, we determined the optimal notch depth by FEA. The proposed method was applied to two types of IPMSM whose sizes, structures, and PM materials were different. The cogging torques of both the motors with optimal notches reduced significantly. Moreover, it also revealed that the notch hardly affects the maximum torque on load.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.140 No.6 （2020）

本誌掲載ページ: 450-457 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejias/140/6/140_450/_article/-char/ja/