Emergency power units
AssigneeHamilton Sundstrand Corporation
InventorMalcolm P. MacDonald
Life of this patent
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Abstract
In accordance with at least one aspect of this disclosure, an emergency power unit system for an aircraft includes, a fuel cell system configured to generate power using a fuel and an oxidizer and to supply electrical power to an aircraft electrical bus in at least a fuel cell operational mode. An electrical storage is operatively connected to the aircraft electrical bus and directly connected to the fuel cell system to provide electrical power to the aircraft electrical bus and to the fuel cell system in a fuel cell start up mode.
Claims19
An emergency power unit system for an aircraft, comprising:
- a fuel cell system configured to generate power using a fuel and an oxidant and to supply electrical power to an aircraft electrical bus in at least a fuel cell operational mode;
- and
- an electrical storage operatively connected to the aircraft electrical bus and directly connected to the fuel cell system to provide electrical power to the aircraft electrical bus and to the fuel cell system in at least a fuel cell start up mode.
A method, comprising:
- supplying power from an electrical storage to an aircraft electrical bus;
- and
- directly supplying power from the electrical storage to a fuel cell system to power the aircraft electrical bus and the fuel cell system before supplying power to the aircraft electrical bus with only the fuel cell system.
Dependencies are inferred from the claim text.