研究等業績 - その他 - 田島 克文
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フェライト磁石を併用したセグメント構造アウターロータ型PMモータのトルク脈動低減に関する検討
櫻井 将, 吉田 征弘, 田島 克文
日本磁気学会論文特集号 ( 公益社団法人 日本磁気学会 ) 9 ( 1 ) 66 - 71 2025年05月
<p> Drones have been used for limited purposes such as aerial photography and pesticide spraying, but now they are expected to be used for logistics and transportation. On the other hand, the drones are operated for a short time about 40 to 60 minutes, and they have a low payload weight of less than 10 kg. To improve these, the battery capacity can be increased, but the weight is also increased and the payload weight is decreased. So, improvement of the motor is necessary. This paper presented a novel outer-rotor-type permanent magnet (PM) motor with a segment-shaped rotor for high power density and low cost. It can be used a magnet flux effectively because it has backyoke iron, and improving output can be expected. However, the torque ripple is increased. So, the improvement of torque ripple is proved using an asymmetry rotor and Ferrite magnet.</p>
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Sm-Fe-Nボンド磁石を用いた射出一体成形IPMSMの開発
吉田 理恵, 吉田 征弘, 上野 泰誠, 山本 宗生, 田島 克文
日本磁気学会論文特集号 ( 公益社団法人 日本磁気学会 ) 9 ( 1 ) 77 - 81 2025年05月
<p> This paper presents the evaluation of an interior permanent magnet synchronous motor (IPMSM) prototype, in which Sm-Fe-N plastic-bonded magnets were injection-molded into the rotor core. The mold design and rotor shape during the injection molding process were clarified through finite element method (FEM) analysis, and the characteristics of the prototype rotor magnets largely matched the designed specifications. Furthermore, to evaluate the motor characteristics, a motor was prototyped, and the induced voltage was measured. The measurement results closely matched the FEM simulation, demonstrating the validity of the proposed motor. Additionally, a comparison with an IPMSM using Nd-Fe-B sintered magnets, conducted through FEM analysis, showed that the proposed motor exhibited comparable torque characteristics, demonstrating its practical utility.</p>
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Evaluation of an IPMSM Featuring a Rotor Core Directly Injection-Molded with Sm-Fe-N Bonded Magnets
Yoshida Y.
2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024 ( 2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024 ) 2636 - 2639 2024年
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Improving Reluctance Torque of Outer-Rotor-type PM Motor with Segmented Rotor Structure
Sakurai S.
2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024 ( 2024 27th International Conference on Electrical Machines and Systems, ICEMS 2024 ) 3122 - 3127 2024年
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Systematical Tuning for Back-phasing Damping of a Stepping Motor
Matsuo Kenshi, Miura Takeshi, Tajima Katsubumi
IEEJ Journal of Industry Applications ( 一般社団法人 電気学会 ) 11 ( 5 ) 713 - 714 2022年09月
<p>The rotor oscillation of a stepping motor occurs during rotor positioning. A novel tuning method can systematically determine the proper exciting times of back-phasing damping to suppress the oscillation without trial and error. The exciting times are automatically determined such that the transfer function zeros of the damping cancel the poles of the motor model. The motor drives sufficiently suppress the oscillation using the exciting times tuned for attached loads.</p>
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田島 克文
電気学会誌 ( 一般社団法人 電気学会 ) 138 ( 12 ) 824 - 824 2018年12月
その他記事 単著
<p>我が国の電機産業はバブル崩壊の直前，自動車産業と並ぶ輸出産業の花形であった。しかし，1991年～1993年のバブル崩壊，2000年のITバブル崩壊，2008年のリーマン</p>
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Demagnetization analysis of ferrite magnet motor based on reluctance network analysis
Momma D.
19th International Conference on Electrical Machines and Systems, ICEMS 2016 ( 19th International Conference on Electrical Machines and Systems, ICEMS 2016 ) 2017年01月