Hitachi, Ltd.

Hitachi Industrial Products, Ltd.

Kengo Ueda

Kenichi Sugimoto

Kenji Ikeda

Hiroaki Kojima

Kazuo Nishihama

Takayuki Koyama

Masanori Sawahata

Shoichi Maruyama

Makoto Imura

Motonobu Iiduka

Yuuichirou Yoshitake

Daisuke Kamegawa

There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as &#x3bc;, a relationship of ws&#x3e;&#x3bc;&#xd7;I&#xd7;Tr/0.6 is met.

Rotary electric machine and drive system using same

The rotating electrical machine of the present invention includes a stator coil obtained by curing the impregnating resin injected into the whole stator coil unit after an electrically insulated coil unit with a mica tape having been wrapped around a conductor is slotted into stator iron core slots via a slot liner. The high-heat-resistance resin component of the slot liner contains at least an epoxy resin having 3 or more epoxy groups. The high-heat-resistance resin component of the mica tape contains at least an alicyclic epoxy resin. The impregnating resin contains a bifunctional epoxy resin, and an acid curing agent having one acid anhydride skeleton. With the impregnating resin, the high-heat-resistance resin components of the slot liner and the mica tape form a liner cured portion and a mica insulating layer portion as an integral unit of different resin compositions inside the slot.

Rotating electrical machine

Growing community of inventors

Tokyo, Japan

Kengo Ueda