Emergency power supply system, aircraft having such an emergency power supply system and a method for providing at least electric power and hydraulic power in case of an emergency in an aircraft

摘要

An emergency power supply system (2) for providing at least hydraulic power and electric power in an aircraft comprises a fuel cell (4) having an electric outlet (8) for providing electric power, a conversion unit (6) for conversion of electric power couplable with at least one of an AC bus and a DC bus of the aircraft and the electric outlet (8) of the at least one fuel cell (4), and at least one hydraulic pump (10) having a reconfigurable electric motor (14) and a motor control unit and being couplable with a hydraulic system (12) of the aircraft for providing hydraulic power. The conversion unit (6) is adapted for converting a supply voltage of the electrical outlet (8) of the at least one fuel cell (4) to at least one of an AC voltage matching a predetermined voltage at the AC bus and a DC voltage matching a predetermined voltage at the DC bus. Further, the reconfigurable electric motor (14) is couplable with the at least one fuel cell (4) and the AC bus, wherein the reconfigurable electric motor (14) is adapted for being operated by the supply of electric power either from the at least one fuel cell (4) or the AC bus.