日本AEM学会誌
Online ISSN : 2187-9257
Print ISSN : 0919-4452
ISSN-L : 0919-4452
24 巻 , 4 号
選択された号の論文の10件中1~10を表示しています
特集 蓄電とその周辺技術
一般論文[学術論文]
  • 野中 剛, 豊田 昭仁, 大戸 基道
    2016 年 24 巻 4 号 p. 323-330
    発行日: 2016年
    公開日: 2017/05/10
    ジャーナル フリー

     The magnet arrangement of the concentrated flux IPM motor, that concentrates the magnetic flux from the magnet at the air gap, was considered. A prototype motor was experimentally manufactured and evaluated. In this study, it is confirmed that the proposed concentrated flux IPM motor can achieve a torque which is twice that of the existing SPM motor. The problems with manufacturing is identified and the measures to counter those is considered.

  • 村井 正徳, 松岡 秀治, 山中 恭二, 平野 隆司, 山中 義也, 内一 哲哉, 高木 敏行
    2016 年 24 巻 4 号 p. 331-339
    発行日: 2016年
    公開日: 2017/05/10
    ジャーナル フリー

     To eliminate microwave reflections from a rectangular antenna element used to irradiate liquid objects with microwaves, the element needs to be designed optimally. Two design parameters: relative permittivity and thickness of the antenna, were used in the optimization, the objective function to be minimized being power reflection coefficient of the microwaves. An applicable range of relative permittivity for the liquid objects was identified. The characteristics of the antenna were checked in numerical simulation and experiments using water. Also the temperature dependencies of the antennas with existing material were checked in both numerical and experimental tests.

  • 木村 奈津子, 久保田 健, 古屋 泰文
    2016 年 24 巻 4 号 p. 340-345
    発行日: 2016年
    公開日: 2017/05/10
    ジャーナル フリー

     Co-rich Co-Fe alloy is known to possess of high saturation magnetostriction, high Curie temperature and good mechanical property. In this study, the rapidly solidified Co75Fe25 alloy were studied for appearance further large magnetostriction due to change in both of the structure and the texture by a combination of heat treatment and cold-rolling. The Co-Fe alloy ribbons were produced by a single Cu-roller rapid solidification, and subsequently annealed at 973-1023K for 1h in vacuum atmosphere after rolling. For evaluation of the heat treatment effect and the rolling effect, magnetic properties such as magnetization, coercivity, magnetostriction and susceptibility were measured as well as crystal structure. As a result, enhancement of magnetostriction improved due to combination of cold-rolling and annealing because precipitating appearance of fcc phase decreased, and also magnetostrictive susceptibility improved caused by enhancement of magnetostriction reached to about 2 times. Additionally the coercivity of annealed specimens after rolling showed a decreasing tendency compared with that of without rolling.

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