Patent ID: 8594874

Claim:
A fuel cell system comprising: a fuel cell that generates electricity using a fuel gas and an oxidizing gas; a vehicle-driving motor inverter that is supplied with direct-current electric power and supplies alternating-current electric power to a vehicle-driving motor; an accessory motor inverter that is supplied with direct-current electric power and supplies alternating-current electric power to an accessory motor; a converter that is provided between the fuel cell and both the vehicle-driving motor and accessory motor, and that boosts output voltage of the fuel cell and supplies the output voltage boosted to the vehicle-driving motor inverter and the accessory motor inverter; a voltage acquisition device that acquires a required voltage of the accessory motor according to a target accessory motor torque based on an acceleration demand of the accessory motor; and a converter control device that sets a voltage boost ratio of the converter and controlling the converter by comparing the acquired required voltage of the accessory motor and a required voltage of the vehicle-driving motor.