Hitachi, Ltd.

Hitachi Industrial Products, Ltd.

Yoshihiro Yasui

Tetsuo Fujigaki

Masanori Matsumoto

Motonobu Iizuka

Takeshi Nakayama

Yasushi Hayasaka

Atsushi Fukunaga

Yasunori Otsuki

Mamoru Kimura

Masaaki Endo

Daisuke Kori

Masaaki Endou

Masahiro Hori

Akiyoshi Komura

Youichi Matsumoto

Motonobu Iiduka

Naoki Kunihiro

Masakatsu Sato

Shogo Serita

Eiichirou Tokizaki

Ai Nagano

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 permanent magnet electrical rotating machine is provided which is capable of contributing to protected permanent magnets and increased cooling performance during operation. The permanent magnet electrical rotating machine includes: permanent magnets; rotor cores that have the permanent magnets mounted thereto and are laminated in a rotating axis direction; spacers that are placed between adjacent rotor cores; and permanent magnet protection members that are installed between the permanent magnets and the rotor cores and also placed to maintain radial continuity in space partitioned by the spacers between the rotor cores.

Permanent magnet electrical rotating machine with protection members arranged between permanent magnets and rotor cores

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

The permanent magnet rotating electric machine comprising a stator with a stator coil wound on a stator iron core, a rotor with a plurality of permanent magnets disposed in the circumferential direction in a rotor iron core, which is disposed opposite to the stator iron core of the stator with a predetermined spacing therebetween and is fixed to a shaft, a water-cooling unit disposed around the outer circumference of the stator iron core, and a fan fixed to the shaft on the same side as at least one axial end of the rotor iron core to circulate cooling air in the permanent magnet rotating electric machine;

Permanent magnetic rotating electric machine and wind power generating system

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Tokyo, Japan

Yoshihiro Yasui