Patent ID: 9318937
Filing Date: 2016-04-19
CPC Classification: H02K,H02P

Claim Text:
1. A permanent magnet machine comprising: an excitation controller; a wound field stator exciter configured to receive a control current from the excitation controller; stator armature windings; rotating exciter windings that develop an alternating current (AC) voltage in response to excitation provided by the wound field stator exciter; a rotating rectifier that rectifies the AC voltage developed in the rotating exciter windings to a direct current (DC) voltage; a control winding configured to receive winding current using the DC voltage; and rotating permanent magnets embedded within a ferromagnetic yoke; wherein the rotating permanent magnets are configured such that magnetic flux of the rotating permanent magnets flows through the ferromagnetic yoke and is only received by the stator armature windings when the winding current is received by the control winding; wherein the control winding is configured to saturate the ferromagnetic yoke to direct the magnetic flux of the rotating permanent magnets to the stator armature windings when the control current is received by the control winding.