초록 ▼

A process for operating a PEM fuel cell unit containing at least one PEM fuel cell block and a speed-controlled compressor connected upstream. To control changing an electrical current I of the PEM fuel cell block to a new reference value I.sub.SN, a speed n of the compressor is set in a first step

A process for operating a PEM fuel cell unit containing at least one PEM fuel cell block and a speed-controlled compressor connected upstream. To control changing an electrical current I of the PEM fuel cell block to a new reference value I.sub.SN, a speed n of the compressor is set in a first step to a maximum value n.sub.M and in a second step is reduced to a speed n.sub.SN corresponding to the new reference value I.sub.SN. By this expedient improved dynamics for brief and rapid load changes are achieved.

대표청구항 ▼

[ What is claimed is:] [1.] An improved process for operating a polymer electrolyte membrane (PEM) fuel cell unit with at least one PEM fuel cell block and a speed-controlled compressor connected upstream of the at least one PEM fuel cell block, the improvement which comprises:controlling a change o

[ What is claimed is:] [1.] An improved process for operating a polymer electrolyte membrane (PEM) fuel cell unit with at least one PEM fuel cell block and a speed-controlled compressor connected upstream of the at least one PEM fuel cell block, the improvement which comprises:controlling a change of an electrical current of the PEM fuel cell block from a value I to a new larger reference value I.sub.SN in a first step by setting a speed n of the speed-controlled compressor to a stipulated maximum value n.sub.M in the first step, the stipulated maximum value n.sub.M of the speed n being greater than a value n.sub.SN of the speed n corresponding to the new larger reference value I.sub.SN of the electrical current; andreducing the speed n of the speed-controlled compressor in a second step to the value n.sub.SN of the speed corresponding to the new larger reference value I.sub.SN.