Patent ID: 6025700
Filing Date: 2000-02-15
Classification: G05B,H02P

Abstract:
A regulator for a brushless synchronous alternator that has a rotary exciter with a stationary excitation inductor comprising:a power stage connected to the alternator to control said alternator excitation;an analog regulator circuit that is selectively connected to said power stage under fault conditions and regulates said excitation current by receiving inputs of an alternator output voltage, an open circuit voltage, and a power factor;a digital regulator circuit that is selectively connected to said power stage and under normal conditions regulates said excitation current by receiving inputs of an alternator output voltage, an open circuit voltage, and a power factor, where said digital regulator circuit being arranged and constructed to be isolated from mechanical vibrations of the alternator; anda control circuit that is connected to said digital regulator circuit and to said analog regulator circuit, said control circuit being arranged and constructed to operate in a normal mode when said digital regulator circuit is operational, and in a fault mode when said analog circuit is operational, where said control circuit selectively connecting said digital regulator circuit to said power stage in said normal mode and said analog regulator circuit to said power stage in said fault mode by receiving a system fault signal.