Patent ID: 7372222

Claim:
A control device for a motor-driven 4WD vehicle wherein either one of front wheels or rear wheels are driven by an engine and the others are driven by a motor depending upon needs, comprising: a motor-generator driven by the engine to generate a first electric power with a first rated voltage; a single step-up and step-down inverter for stepping down the first electric power to a second electric power with a second rated voltage lower than the first rated voltage; and an electrical equipment supplied with the second electric power outputted from the single step-up and step-down inverter, the electrical equipment including a battery, wherein the motor is driven with the first electric power with the first rated voltage outputted from the motor-generator, the single step-up and step-down inverter has a first function to cause the first electric power to be stepped down to the second electric power and a second function to cause a third electric power with a third rated voltage which is discharged from the battery to be stepped up to a fourth electric power with a fourth rated voltage higher than the third rated voltage.