PROCESS FOR OPERATION OF A PEM FUEL CELL UNIT

摘要

This invention concerns a process for oper- ating a PEM fuel cell system (2) with at least one PEM fuel cell block (4) and an upstream compres- sor (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 I SN, in a first step, the rotational speed (n) of the compressor (8) is set at a maximum value n M and, in a second step, re- duced to a rotational speed n SN which corresponds to the new set value I SN. These measure provide improved dynamics for brief and rapid changes in load.