Keiji Noma
Hitachi
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Publication
Featured researches published by Keiji Noma.
the international power electronics conference - ecce asia | 2010
Ryoichi Takahata; Shinichi Wakui; Kenji Miyata; Keiji Noma; Masaharu Senoo
This paper describes the influence of rotor eccentricity on permanent magnet synchronous motor characteristics by a magnetic field analysis and several experiments. The rotor eccentricity unbalances the magnetic force and thus increases the mechanical loss. Furthermore, a circulating current generated in two three-phase windings connected in parallel results in an increase of electric power loss in the permanent magnet synchronous motor. Therefore, we presented that the flux barrier rotor is effective to reduce the harmful effect of the rotor eccentricity.
international conference on electrical machines and systems | 2009
Ryoichi Takahata; Shinichi Wakui; Kenji Miyata; Keiji Noma; Masaharu Senoo
This paper describes the influence of rotor eccentricity on permanent magnet synchronous motor characteristics. Specifically, we studied the influence of rotor eccentricity on permanent magnet synchronous motor characteristics by conducting a magnetic field analysis and several experiments. The rotor eccentricity unbalances the magnetic force and thus increases the mechanical loss. Furthermore, a circulating current generated in two three-phase windings connected in parallel results in an increase in electric power loss in the permanent magnet synchronous motor.
Archive | 2010
Ryoichi Takahata; Satoshi Kikuchi; Shinichi Wakui; Keiji Noma; Masaharu Senoo
Archive | 2003
Haruo Koharagi; Masaharu Senoh; Keiji Noma; Kohei Ishii; Kazuo Sato; Satoshi Kikuchi; Miyoshi Takahashi; Kouki Yamamoto
Archive | 2001
Keiji Noma; Toru Sakai; Akihiro Sekine; Masaharu Senoo; Keisuke Yamanaka; 正治 妹尾; 桂介 山中; 亨 酒井; 啓二 野間; 昭裕 関根
Archive | 1998
Satoshi Kikuchi; Kouchiyuu Kin; Keiji Noma; Haruo Oharagi; Manabu Sasaki; Kazuo Sato; Masaharu Senoo; Kazuo Tawara; 学 佐々木; 和雄 佐藤; 正治 妹尾; 春雄 小原木; 和雄 田原; 菊地 聡; 啓二 野間; 金 弘中
Ieej Transactions on Industry Applications | 2012
Ryoichi Takahata; Shinichi Wakui; Kenji Miyata; Keiji Noma; Masaharu Senoo
Archive | 2002
Satoshi Kikuchi; Keiji Noma; Haruo Oharagi; Ryoichi Takahata; Shinichi Wakui; 小原木 春雄; 湧井 真一; 菊地 聡; 野間 啓二; 高畑 良一
Archive | 2000
Kohei Ishii; Satoshi Kikuchi; Keiji Noma; Haruo Oharagi; Kazuo Sato; Masaharu Senoo; Miyoshi Takahashi; Koki Yamamoto; 和雄 佐藤; 正治 妹尾; 春雄 小原木; 弘毅 山本; 公平 石井; 菊地 聡; 啓二 野間; 身佳 高橋
Archive | 2010
Ryoichi Takahata; So Kikuchi; Masaharu Imoo; Keiji Noma; Shinichi Wakii
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