Patent ID: 8104556

Claim:
A drive-control apparatus for an electric-drive vehicle, that drives and controls a vehicle driven by electric power generated from mechanical power produced by an internal combustion engine, the apparatus including: an internal combustion engine for producing mechanical power; a main generator and an auxiliary generator each for generating electricity, being supplied with the mechanical power that the internal combustion engine generates; a main rotating machine for producing mechanical power so as to drive the vehicle, being supplied with electric power that the main generator generates, and for generating electric power during deceleration of the vehicle; an electric power converter for performing conversion of the main-generator-generated electric power to supply the main rotating machine therewith, and for receiving electric power generated by the main rotating machine; a braking resistor for dissipating electric power that is generated by the main rotating machine and supplied through the electric power converter; a fan motor supplied with alternating electric power that is generated by the auxiliary generator and has a frequency proportional to a rotation speed of the internal combustion engine, the fan motor whose pole number is changeable; a fan for making an air flow in order to cool down the electric power converter, being driven by the fan motor; a pole-number-changing switch for changing the pole number of the fan motor; and a controlling unit for controlling the internal combustion engine, the electric power converter, the braking resistor, and the pole-number-changing switch.