Patent ID: 9698651
Date: 2017-07-04
CPC Classifications: B64D,F01D,H01F,H02K

Claim:
1. An electrical power supply comprising: an asynchronous machine having a stator and a rotor and configured to transfer energy from the stator to the rotor at a first efficiency; an arrangement for driving the rotor of the asynchronous machine in rotation by a rotor of an engine; an electrical connection for powering electrical equipment from a winding of the rotor of the asynchronous machine, the transfer of energy from the winding of the rotor of the asynchronous machine to the electrical equipment having a second efficiency; and a controller that regulates the power delivered to the electrical equipment by controlling an amount of AC electrical power provided to a winding of the stator of the asynchronous machine based on a drive speed of the rotor of the asynchronous machine and at least one of the first efficiency and the second efficiency, and when the drive speed of the rotor of the asynchronous machine falls within a predetermined range of drive speeds, the controller controls the amount of AC electrical power provided to the winding of the stator of the asynchronous machine to maximize the first efficiency in transferring electrical power from the stator to the rotor without considering the second efficiency with which power is transferred from the winding of the rotor of the asynchronous machine to the electrical equipment.