ELECTRIC CONVERTER FOR FUEL CELL

摘要

The invention relates to an electric converter for a fuel cell (P) comprising current inverter means (2). The inventive electric converter comprises a voltage step-down chopper (1) which is mounted between the fuel cell (P) and the current inverter means (2). According to the invention, when a control signal is applied to the voltage step-down chopper (1), (i) the value of the average input voltage of the current inverter means is lowered to a threshold value (Vs) in the electrode activation zone of the cell, (ii) the value of the average input voltage of the current inverter means (2) is maintained at the voltage value at the cell terminals (Vp) in the resistance zone of the cell, and (iii) the output current from the converter is limited when the output current of the current inverter means (2) reaches a maximum reference value (Imax).