VOLTAGE REGULATOR OF GENERATOR POWER SUPPLY Russian patent published in 1998 - IPC

FIELD: voltage regulators for AC and DC generators including those used for automotive vehicles. SUBSTANCE: newly introduced in voltage regulator are protective transistor, first and second control transistors, control transistor switch and transistor switch which form, together with first, second, and third transistors, relaxation circuit for generator operating in self-excited oscillation mode in case of short circuit in field winding of generator power supply. During self-excited oscillation mode, power transistor switches carry pulse currents whose mean value is negligible provided values of protective gear resistor and resistive voltage divider determining time constants of capacitor charge and discharge are adequately chosen. Upon clearing short circuit in field winding of generator power supply, voltage regulator is reclosed automatically. EFFECT: improved reliability due to protection of power transistor switches in case of short circuit in field winding of generator power supply. 2 dwg