| 摘要 |
<p>A permanent magnet motor (1) is provided with: a permanent magnet (23) embedded into a rotor (20) so as to come close to the outer circumferential surface of the rotor (20) at two locations on the edge said locations corresponding to each side of a square in which the axial center of the rotor (20) functions as the center; and slits (26) which are disposed between the permanent magnet (23) and the outer circumferential surface of the rotor (20) and are arranged at an interval along the permanent magnet (23) and of which the cross sectional shape forming a right angle with the axial line direction of the rotor is a lengthwise shape extending from the side of the permanent magnet towards the outer circumferential surface of the rotor. With regard to the slits (26a 26b) in the vicinity of the edges including the slits disposed in correspondence with the edges of the permanent magnet (23) the lengthwise directions of the cross section of the slits are roughly parallel to one another and the distances (Xa Xb) between the outer circumferential surface of the rotor (20) and the edge of the slits on the side of the outer circumferential surface of the rotor are different.</p> |
