Patent ID: 9143076
Filing Date: 2015-09-22
Classification: H02J,H02P,Y02B,Y04S

Abstract:
1. A method comprising: determining an applied armature voltage supplied to a polyphase synchronous machine having a pull-out torque, the armature voltage supplied from a power source via one of a plurality of taps of a regulating transformer, a first tap of the plurality of taps configured to supply a voltage at a different level than a second tap of the plurality of taps; selecting the second tap to supply the armature voltage based on the determined applied armature voltage, power consumption of the machine, and a confidence level that the pull-out torque is not exceeded, wherein the confidence level corresponds to a probability distribution indicative of at least one operating characteristic of the polyphase synchronous machine; and responsive to a slip of the polyphase synchronous machine, increasing a margin of the pull-out torque.