PROCESS FOR OPERATION OF A PEM FUAL CELL UNIT

摘要

This invention concerns a process for operating a PEM fuel cell system (2) with at least one PEM fuel cell block (4) and an upstream compressor (8) the rotational speed of which is controlled. To regulate the electrical current I of the PEM fuel cell block (4) to a new set value ISN, in a first step, the rotational speed (n) of the compressor (8) is set at a maximum value nM and, in a second step, reduced to a rotational speed nSN which corresponds to the new set value ISN. These measure provide improved dynamics for brief and rapid changes in load.