Patent ID: 6486639
Filing Date: 2002-11-26
Classification: H02P

Abstract:
A method of controlling a stand-alone electrical generator including an asynchronous rotating machine whose wound rotor is driven mechanically at a particular voltage and with a particularly frequency, a stator and said rotor being excited by an inverter controlled by a pulse width modulation control circuit and supplied by a constant DC voltage source, said method comprising the steps of:generating a signal representing a stator frequency set point, generating a signal representing a rotor frequency set point, as a function of the stator frequency set point and a rotation speed of said machine, generating a signal representing a stator voltage rms set point value, generating an error signal as a function of a difference between said stator voltage rms set point value and a rms value of an actual stator voltage, and imposing on said control circuit a rotor voltage set point which is a function of said error signal and said rotor frequency set point.