Abstract: Disclosed herein is a method for generating an injected current of a fuel cell stack performed in an apparatus for generating an injected current of a fuel cell stack, the method including: extracting a first frequency current and a second frequency current by passing alternating currents of different frequencies through a plurality of filters, respectively; generating a summed frequency current by summing the first frequency current and the second frequency current; and applying the summed frequency current to the fuel cell stack. Therefore, it is possible to operate the fuel cell stack by applying the summed current obtained by summing the alternating current for calculating the total harmonic distortion (THD) and the alternating current for calculating the impedance to the fuel cell stack.

Abstract: The present invention relates to an electric vehicle and a control method thereof. According to the inventive electric vehicle and control method thereof, the state of a fuel cell that is a driving power of the electric vehicle can be sensed to determine whether the fuel cell system is normal or not, and output different sound sources according to the states of the fuel cell system so that the sound outputted as a driving sound while the electric vehicle runs may vary to allow a driver to recognize the state of the electric vehicle and a change in state of the fuel cell. Also, the awareness of difference in driving of the motor can be decreased through the sound outputted as the driving sound of the electric vehicle to improve the driver's satisfaction and allow pedestrians to more easily recognize approach of the electric vehicle.

Abstract: Disclosed herein is a method for generating an injected current of a fuel cell stack performed in an apparatus for generating an injected current of a fuel cell stack, the method including: extracting a first frequency current and a second frequency current by passing alternating currents of different frequencies through a plurality of filters, respectively; generating a summed frequency current by summing the first frequency current and the second frequency current; and applying the summed frequency current to the fuel cell stack. Therefore, it is possible to operate the fuel cell stack by applying the summed current obtained by summing the alternating current for calculating the total harmonic distortion (THD) and the alternating current for calculating the impedance to the fuel cell stack.

Abstract: The present invention relates to an electric vehicle and a control method thereof. According to the inventive electric vehicle and control method thereof, the state of a fuel cell that is a driving power of the electric vehicle can be sensed to determine whether the fuel cell system is normal or not, and output different sound sources according to the states of the fuel cell system so that the sound outputted as a driving sound while the electric vehicle runs may vary to allow a driver to recognize the state of the electric vehicle and a change in state of the fuel cell. Also, the awareness of difference in driving of the motor can be decreased through the sound outputted as the driving sound of the electric vehicle to improve the driver's satisfaction and allow pedestrians to more easily recognize approach of the electric vehicle.