Patent ID: 7567006

Claim:
A rotating electric machine apparatus comprising: a magnetic field pole part and an armature that are opposed to each other concentrically along an axis in a radial direction or in an axial direction and that are disposed to be capable of relatively rotating; wherein the armature has an armature coil, wherein the magnetic field pole part is divided into a surface magnetic pole part and a magnetic excitation part which are composed so as to be capable of being relatively displaced, wherein the surface magnetic pole part has a plurality of magnetic salient poles disposed in a circumferential direction oppositely to the armature and has a plurality of magnetic salient pole extensions and a plurality of bypass magnetic poles disposed oppositely to the magnetic excitation part, wherein the magnetic excitation part has a field magnet that an end thereof opposes the magnetic salient pole extension and the bypass magnetic pole, and the field magnet is disposed so that the adjacent magnetic salient poles are magnetized in different polarities each other, wherein a main magnetic flux pathway in which a magnetic flux from the field magnet circulates through the magnetic salient pole and the armature and a bypass magnetic flux pathway in which a magnetic flux from the field magnet circulates within the magnetic field pole part are connected to the field magnet in parallel, wherein the surface magnetic pole part and the magnetic excitation part are composed so as to be capable of being relatively displaced so that a sum of an area of the field magnet opposed to the magnetic salient pole extension and an area of the field magnet opposed to the bypass magnetic pole is maintained to be constant, and further wherein any one of the surface magnetic pole part and the magnetic excitation part serves as a movable magnetic pole part, and the movable magnetic pole part is relatively displaced with respect to the other one thereof by a displacement control means, and thereby, an amount of the magnetic flux flowing into the main magnetic flux pathway is controlled.