| 摘要 |
PROBLEM TO BE SOLVED: To make permanent magnets less likely to be demagnetized.SOLUTION: A rotor core has a pair of magnet holes into which a pair of permanent magnets are inserted that are arranged, at increasing intervals toward an outer edge of the rotor core, with magnetic poles thereof in an identical orientation with respect to a radial direction. Each magnet hole is in the shape of a first hole and a second hole being coupled to each other. The first hole is formed along the shape of each permanent magnet. The second hole covers a corner, of one of the pair of permanent magnets as inserted in the first hole, nearest to the other of the pair of permanent magnets through an air gap. A rectangular bridge portion with a longitudinal direction thereof directed in the radial direction is formed between the respective second holes of the pair of magnet holes. |
