著者

十時 詠吾 山口 信一 田中 敏則 伊藤 一将 大穀 晃裕 森本 茂雄

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.141, no.10, pp.763-770, 2021-10-01 (Released:2021-10-01)

参考文献数

34

被引用文献数

1

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This paper presents a new configuration for the concentrated windings of permanent magnet motors in order to reduce the torque ripple. There are limited choices for the concentrated windings in conventional permanent magnet motors when selecting the numbers of poles and slots, which results in winding factors for harmonics that cannot be zero and the corresponding torque ripple remains. Unlike conventional concentrated-winding motor, whose teeth are all wound with one coil, the proposed concentrated-winding motor has some teeth with multiple coils wound around. The number of turns for each coil can be optimized to reduce its winding factors for harmonics to nearly zero so that the corresponding torque ripple could be significantly reduced. Prototypes of the conventional and proposed motors were constructed, and the experimental results are compared. Simulation and experimental results confirm the torque reduction effect of the proposed concentrated-winding motor.

著者

寺家 尚哉 深見 正 小山 正人 満田 宇宙 伊藤 一将 山田 正樹

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.140, no.7, pp.542-549, 2020-07-01 (Released:2020-07-01)

参考文献数

16

被引用文献数

6

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This paper presents a new type of axial gap motor, called the flux-modulating hybrid field motor (FHM). For flux modulation, the FHM has rotor iron pieces sandwiched between two stators, the armature and field poles. The field poles comprise permanent magnets and electromagnets, and the magnetic flux of the electromagnets can be adjusted by changing the field current. To validate the principle of this FHM, a 0.8-kW prototype machine was fabricated, and the basic characteristics of the prototype machine were investigated through experiments and three-dimensional finite element analysis. The results show that the torque can be varied in a wider range by changing the armature current vector and field current.