Patent ID: 6885122

Claim:
A motor/generator comprising: a stator that generates magnetic fluxes; a rotor that generates magnetic fluxes reacting with the magnetic fluxes of the stator to rotate; and a plurality of permanent magnets that are disposed in either the stator or the rotor, wherein the permanent magnets are placed around either an inner side of the stator or an outer side of the rotor, with alternating right direction of magnetic flux and an opposite direction of magnetic flux, wherein a pole of each permanent magnet comprises a plane facing a clearance formed by the stator and the rotor and perpendicularly intersecting with a center plane, and an opponent surface, wherein the center plane passes a rotation axis of the motor/generator and splits each permanent magnet into two equal parts, the opponent surface being formed by two or more planes, at least two of the planes forming angles of less than 90 degrees, as measured on the side of the clearance, with the center plane, and each having a size bigger than a half of the plane facing the clearance formed by the stator and the rotor, and wherein a direction of the magnetic flux generated by the permanent magnets is parallel to the center plane.