Hitachi, Ltd.

Hitachi Industrial Products, Ltd.

Yasunori Otsuki

Takeshi Nakayama

Masanori Matsumoto

Yasushi Hayasaka

Motonobu Iizuka

Tetsuo Fujigaki

Atsushi Fukunaga

Yoshihiro Yasui

Masaaki Endou

Masaaki Endo

Daisuke Kori

Naoki Kunihiro

Masakatsu Sato

A method for manufacturing a neutral ring includes connecting a cut-off neutral ring to an arc-shaped connection element. The method also includes filling an insulator between the cut-off neutral ring and a connection element. The neutral ring shunts the rotor coil in three phases.

Method for manufacturing a neutral ring for use in rotating electrical machine

A rotating electric machine comprises a field winding provided on a rotor iron core and a neutral ring supported independently of the field winding, wherein: the field winding and the neutral ring are electrically connected to each other through a connecting wire; the neutral ring is disposed spaced with respect to the rotor iron core; and the connecting wire absorbs the stress difference between the field winding and the neutral ring when a centrifugal stress is applied.

Rotating electric machine or wind power generation system

A rotating electrical machine includes a rotor core, a rotor shaft, a coil, a bind, a lead-out wire of which one end is connected to the coil and the other end is connected to a neutral ring. A filling is filled between the coil and the neutral ring. The neutral ring is formed with a plurality of members that are connected with one another to have flexibility.

Neutral ring for use in rotating electrical machine and method for manufacturing the same

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Tokyo, Japan

Yasunori Otsuki