Patent ID: 8823334
Filing Date: 2014-09-02
Classification: H02P

Abstract:
1. A method for operating a machine having a main machine, exciter, and permanent magnet generator (PMG), each having a stator and a rotor, with each rotor mounted to a common shaft, the method comprising: applying a starting current to the stator of the main machine to induce a damper current in a damper winding of the main machine rotor to generate a starting torque that initiates the rotation of the common shaft; inducing a PMG current in the stator of the PMG in response to the rotation of the PMG rotor with the common shaft; supplying the PMG current to the exciter stator to induce an exciter rotor current in the rotor of the exciter; and supplying the exciter rotor current to the rotor of the main machine; wherein the applying of the starting current is terminated prior to the damper winding exceeding its thermal limit.