Electric generating system for automobiles and its control method

The present invention relates to a vehicle driving apparatus capable of providing a sufficient driving force. A driving high-power generator (44) is driven by an engine (20). A DC motor (30) is driven directly by energy from the generator (44). A driving generator output voltage control circuit (60) controls output voltage of the generator (44) in accordance with the demanded driving force from the vehicle (10) to control the motor (30).