FUEL CELL SYSTEM HAVING AN AIR COMPRESSOR AND A DRIVING CONTROL METHOD FOR A MOTOR OF THE AIR COMPRESSOR

A driving control method for a motor of an air compressor is provided and includes: controlling driving of the motor based on a speed command for the motor of the air compressor and a current rotational speed of the motor; and controlling driving of the motor based on the speed command and an expected rotational speed of the motor when an anomaly occurs in determining the current rotational speed. In particular, the expected rotational speed is determined based on a rotational speed map regarding the motor, an air flow rate sensing value and an air pressure sensing value.