Title:
高効率燃料電池電力調整器(powerconditioner)
Document Type and Number:
Japanese Patent JP2004508689
Kind Code:
A
Abstract:
A power conditioner interfaces a load to a fuel cell 10 that produces a low voltage that varies with the load. A dc-to-ac inverter 16 operates with a low voltage input provided by a dc bus 14. When a positive step load change occurs, a low voltage battery 22 provides power equal to the step change until the fuel cell 10 is able to provide enough power to support the entire load. The power from the battery 22 is supplied to the varying dc bus 14 through a boost converter 12. When very large positive load step changes occur, the battery can feed power to the dc bus through diode D1, rather than through the boost converter. Diode D1 does not need to be used, but its use allows the boost converter to be sized for common load changes rather than for the maximum possible load change (such as might be seen during a faulted output). A buck converter converts the variable voltage on the dc bus 14 to the appropriate float charging voltage of the battery. The buck converter also supplies power for auxiliary equipment when available from the fuel cell. If the fuel cell is unable to provide the auxiliary power (such as during startup or load transients), then the auxiliary power can come directly from the battery.
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Inventors:
The Young Wraith, Aaron M
Vinato, Bhapato
Vinato, Bhapato
Application Number:
JP2002525966A
Publication Date:
March 18, 2004
Filing Date:
August 17, 2001
Export Citation:
Assignee:
ABB Inc.
International Classes:
H01M8/04; H01M16/00; H02J1/10; H02J7/34; (IPC1-7): H01M8/04; H02J7/34
Attorney, Agent or Firm:
Heikichi Odashima