Patent ID: 7253591

Claim:
An electric power generation control apparatus comprising: a bridge circuit comprising a pair of power transistors as oppose to each other and a pair of diodes as oppose to each other, the bridge circuit configured to supply a field current to a vehicle alternator; a voltage detection circuit configured to generate and output a control signal indicating ON and OFF operation for supplying the field current in order to set an output voltage generated by the vehicle alternator to an adjusting voltage; an electric generation control circuit configures to control ON and OFF operation of the power transistors according to the control signal transferred from the voltage detection circuit; and an operation mode setting circuit configured to select one of a fly wheeling mode and a regenerative mode, and to select the regenerative mode when receiving an external instruction, transferred from an external device, indicating to halt the generation of the electric power, where in the fly wheeling mode, the voltage control circuit controls one of a pair of the power transistors into ON state and the other power transistor into OFF state, and in the regenerative mode, the voltage control circuit controls a pair of the power transistors into OFF state simultaneously.