METHOD FOR OPERATING A FAN FOR CONVEYING HYDROGEN IN A FUEL CELL SYSTEM

摘要

Methods are known for operating a fan (12) for conveying hydrogen in a fuel cell system, wherein during operation of the fuel cell system an impeller of the fan (12) is driven by an electric motor (17) and, after the fuel cell system has been shut down, the electric motor (17) continues to operate, at least temporarily, in a shutdown procedure. In order to ensure startup, these generally use either purge gas or a heating arrangement. In order to avoid this additional complexity, it is proposed according to the invention that, after the fuel cell system has been shut down, in a first step the power supply to the electric motor (17) is interrupted over a determined time period, and in a second step the electric motor (17) is energized in order to move the fan (12), wherein the first and second step can be repeated multiple times one after the other.