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

摘要

A permanent magnet electrical rotating machine (100) having a permanent magnet rotor (1, 20, 30) and a stator (17), wherein:
a plurality of permanent magnets (3, 4) are disposed in a rotor iron core (2, 21, 22) of the permanent magnet rotor (1, 20, 30) along a periphery of the rotor iron core (2, 21, 22), polarities thereof being alternately changed;
a cooling airflow channel (6) is formed between each pair of adjacent opposite poles on the rotor iron core (2, 21, 22); and the cooling airflow channel (6) has an approximately trapezoidal shape on an outer periphery side of the rotor iron core (2, 21, 22); and extends from an end on a central side in a radial direction of the approximately trapezoidal shape to a radial center.