Patent ID: 8373325

Claim:
A rotating electric machine system comprising: a rotor having a rotor plane; an armature having an armature plane facing the rotor plane and being relatively rotatable with respect to the rotor; the rotor comprising magnetic salient poles in a circumferential direction on the rotor plane, adjacent magnetic salient poles being magnetized in different polarities from each other by a permanent magnet arranged in the magnetic salient pole and or by a permanent magnet arranged between the magnetic salient poles; and the armature comprising: magnetic teeth in the circumferential direction on the armature plane; and armature coils wound around the magnetic teeth; wherein a control magnet is arranged in an inside part of at least one of the adjacent magnetic salient poles in circumferential direction that is away from the armature, wherein an excitation flux path member and an excitation coil are provided, the excitation coil being placed so as to generate an excitation flux collectively in a magnetic flux path including the excitation flux path member, the armature, and the rotor, wherein product of a magnetization direction length and coercivity is set up so that a magnetization state of the control magnet is not changed only depending on a magnetic flux from the armature coils, wherein the rotating electric machine is constituted so that the magnetization state of the control magnet where the magnetic flux by the armature coils and the excitation flux flow in a same direction is changed irreversibly, and wherein an amount of the magnetic flux flowing through the armature coils is controlled by changing the magnetization state of the control magnet in accordance with an output of the rotating electric machine system so that the output is optimized.