Active isolation system for fuel cell

Details Active isolation system for fuel cell Active isolation system for fuel cell

2011-03-15

2011-03-15

Lorengo, Jerry (Department: 1731)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

Process or means for control of operation

C429S433000

Reexamination Certificate

active

07906242

ABSTRACT:
A fuel cell system includes a fuel cell having conductive coolant flowing there through and a high voltage direct current (HVDC) bus interconnected with the fuel cell. An active isolation circuit includes coolant fault current sensors that detect a fault current (also called residual current) in the coolant and generates a fault signal when the fault current is detected. A switching circuit compensates and redirects the fault current based on the fault signal, providing active fault current limitation thereby.

REFERENCES:
patent: 7355831 (2008-04-01), Raiser
patent: 2002/0192521 (2002-12-01), Raiser et al.
patent: 2003/0113599 (2003-06-01), Pearson
patent: 2004/0091759 (2004-05-01), Harrington et al.
patent: 2004/0157091 (2004-08-01), Dewey et al.

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