Patent ID: 8609289

Claim:
A fuel cell system having a voltage converter, the system comprising: a plurality of power detection units, each unit detecting a power passing through the voltage converter, a control unit programmed to compare the power detected by each of the plurality of power detection units being compared with each other, so as to judge whether or not any of the power detection units is in an abnormal condition; the control unit further programmed to prohibit dead time correction for correcting a dead time that changes according to a direction of a reactor current in the voltage converter if it is judged that any of the power detection units is in an abnormal condition; and the powers detected by the plurality of power detection units being: a primary side passing power detected by a power detection sensor provided on a primary side of the voltage converter; a secondary side passing power detected by a power detection sensor provided on a secondary side of the voltage converter; and a reactor passing power that is estimated based on the reactor current detected by a current detection sensor serially connected to a reactor of the voltage converter.