Factor Analysis of Torque Ripple Reduction in Synchronous Reluctance Motors Derived from Topology Optimization

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門（英文）

発行日: 2019/11/01

タイトル(英語): Factor Analysis of Torque Ripple Reduction in Synchronous Reluctance Motors Derived from Topology Optimization

著者名: Hiroyuki Kaimori (Sicence Solutions International Laboratory, Inc.), Yoshifumi Okamoto (Department of Electrical and Electronic Engineering, Hosei University), Shinji Wakao (Department of Electrical Engineering and Bioscience, Waseda University)

著者名(英語): Hiroyuki Kaimori (Sicence Solutions International Laboratory, Inc.), Yoshifumi Okamoto (Department of Electrical and Electronic Engineering, Hosei University), Shinji Wakao (Department of Electrical Engineering and Bioscience, Waseda University)

キーワード: synchronous motor，topology optimization，torque ripple，flux barrier，finite element analysis

要約(英語): Recently, from the viewpoint of vibration and noise reductions, torque ripple reduction of motor-equipped electrical machines is the need of the hour. The authors have already proposed to improve torque characteristics of a synchronous reluctance motor using the topology optimization method. The evaluated rotor structure succeeded in substantial torque ripple reduction, but the cause for this reduction was unknown. In this paper, we investigate the reason for torque ripple reduction using the improved rotor structure of the motor by a topology optimization method known as R-SLP, by comparing it to the reference model using finite element analysis. A calculation method is proposed to analyze the circumferential magnetic force density of spatial and time harmonic orders using the magnetic density in the air gap. By focusing on the time order at which the torque waveform was evaluated, we estimate which circumferential magnetic force density orders affect torque ripple reduction. Then, we clarify the reason for torque ripple reduction to examine the influence of local shape of rotor structure using 12th time-harmonic magnetic fields. As a result, the modified flux barrier rotor structure is obtained, which further reduces the torque ripple in comparison to the previous structure.

本誌: IEEJ Journal of Industry Applications Vol.8 No.6 （2019）

本誌掲載ページ: 1007-1014 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/8/6/8_1007/_article/-char/ja/