Hitachi, Ltd.

Shuji Aizawa

Mamoru Kimura

Daisuke Kori

Hiroyuki Mikami

Motonobu Iizuka

Tetsuo Fujigaki

Yasushi Iwai

A permanent magnet electrical rotating machine having a permanent magnet rotor and a stator, wherein:

Permanent magnet electrical rotating machine, wind power generating system, and a method of magnetizing a permanent magnet

A permanent magnet electrical rotating machine having a permanent magnet rotor and a stator, wherein: a plurality of permanent magnets are disposed in a rotor iron core of the permanent magnet rotor along a periphery of the rotor iron core, polarities thereof being alternately changed; a cooling airflow channel is formed between each pair of adjacent opposite poles on the rotor iron core; and the cooling airflow channel has an approximately trapezoidal shape on an outer periphery side of the rotor iron core; and extends from an end on a central side in a radial direction of the approximately trapezoidal shape to a radial center.

Growing community of inventors

Hitachi, Japan

Shuji Aizawa