Patent · US Expired

Process for operation of a PEM fuel cell unit

US6110611A · kind A · utility

21Cited by

4References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Walter Stuhler · Hirschaid, DE
Herbert Stenger · Burgthann, DE
Martin Keim · Möhrendorf, DE

Key dates

Filing date	Apr 1, 1999
Grant date	Aug 29, 2000
Priority date	—
Expiry date	Apr 1, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T90/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.