Patent ID: 8207645

Claim:
A rotating electric machine system having a rotor and an armature facing radially each other, the rotating electric machine system comprising: the rotor having island-shaped magnetic poles and magnetic salient poles alternately disposed in a circumferential direction on its plane facing the armature; the armature having armature coils disposed in a circumferential direction on its plane facing the rotor, and a magnetic excitation part for magnetizing the island-shaped magnetic poles and the magnetic salient poles collectively in the same direction; wherein the rotor has an isolation member including a permanent magnet and/or a non-magnetic member at least within the island-shaped magnetic poles to prevent passage of magnetic flux coming from outside, thickness of the isolation member within the island-shaped magnetic pole is larger than a thickness of the isolation member within the magnetic salient pole so that magnetic flux coming from the magnetic excitation part should be hard to flow through the island-shaped magnetic pole; the island-shaped magnetic poles are configured so as to be magnetized in about a same axial direction by at least one of a permanent magnet adjacent to the island-shaped magnetic pole and a permanent magnet within the island-shaped magnetic pole; the armature coils are grouped into a first armature magnetic pole group and a second armature magnetic pole group, and in an armature coil pair of the same phase in the first armature magnetic pole group and the second armature magnetic pole group which armature coils are supplied with driving current simultaneously, the armature coils of the armature coil pair are arranged such that the armature coil of one of the armature coil pair opposes the island-shaped magnetic pole when the armature coil of the other one of the armature coil pair opposes the magnetic salient pole, and the armature coils of the armature coil pair are connected to generate magnetic fluxes of mutually opposite directions when current flows; the magnetic excitation part has either one of an excitation coil and a field magnet at least; both ends of the magnetic excitation part are magnetically coupled respectively with one of the rotor and the armature arranged at an outermost circumference and one of the rotor and the armature arranged at an innermost circumference so that a magnetic flux from one end of the magnetic excitation part may return to the other end thereof through the armature and the magnetic salient poles; and an amount of magnetic flux flowing through the armature is controlled by changing an amount of magnetic flux supplied from the magnetic excitation part in accordance with an output of the rotating electric machine system so that the output is optimized.