Patent ID: 7405503
Filing Date: 2008-07-29
Classification: H02K

Abstract:
1. A permanent magnet rotating electric machine which is applicable to operation at not less than 240° C., comprising: a stator having a plurality of salient stator poles wound with windings; and a rotor separated from the stator by a rotation air gap and held rotatably, wherein the rotor comprises: a rotor iron core having therein a plurality of permanent magnet insertion holes annularly arranged side by side at a distance from one another along a circumferential direction of the rotor, wherein the permanent magnet insertion holes have opposing open ends; permanent magnets inserted into the plurality of permanent magnet insertion holes such that the permanent magnets in the insertion holes adjacent to each other along the circumferential direction of the rotor have different magnetic pole directions from each other; and wherein the permanent magnets each comprise a plurality of magnet pieces arranged side by side and have a structure in which nothing is interposed between the magnet pieces, with a removable rotor lid capping each opposing end of the permanent magnet insertion holes.