Patent ID: 7990085

Claim:
A generator control unit used for a power generation drive system, the system comprising: a power generation unit which includes a field-winding-type three-phase synchronous generator and a diode rectifier which rectifies a three-phase AC voltage outputted from the three-phase synchronous generator to a DC voltage; and a three-phase synchronous motor directly driven by an output of the power generation unit; wherein the generator control unit comprises: a PWM signal generation unit which generates a field voltage to be applied to a field winding terminal of the power generation unit in order to control the DC voltage of the DC voltage output terminal in a state where an electric load is connected to the DC voltage output terminal of the power generation unit; and a feedback control unit which calculates a field voltage command value to be given to the PWM signal generation unit; wherein the feedback control unit includes a PI control unit which calculates a voltage deviation between a DC voltage detection value and a DC voltage command value to generate the field voltage command value through a PI operation based on the voltage deviation; and wherein the feedback control unit includes a compensation unit which generates the field voltage command value after compensating the output of the PI control unit for the voltage deviation based on input/output transfer characteristics of the generator from the field voltage to the DC voltage.