Windmill brake for an auxiliary power unit
AssigneeHamilton Sundstrand Corporation
InventorsDhaval S. Patel, Kyle Ives
Life of this patent
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Abstract
A power generation system for an aircraft. The system includes an auxiliary power unit (APU), an APU generator mechanically linked to the APU, a generator control unit controllably coupled to the APU and an electromagnetic windmilling brake connected to APU generator. The electromagnetic windmilling brake includes a number of switched phase connections equal to a number of phases and the switched phase connections are configured to connect each output phase to an adjacent phase.
Claims17
A power generation system for an aircraft comprising:
- an auxiliary power unit (APU);
- an APU generator mechanically linked to the APU;
- a generator control unit coupled to the APU and configured to the control the APU generator;
- and
- an electromagnetic windmilling brake connected to the APU generator, wherein the electromagnetic windmilling brake includes a number of switched phase connections equal to a number of phases and wherein the switched phase connections are configured to connect each output phase to an adjacent phase of the APU generator when the electromagnetic windmilling brake is engaged.
A method for preventing windmilling in an auxiliary power unit (APU) that is operatively connected to an APU generator, the method comprising:
- responding to transitioning the APU from off to on by connecting each output phase of APU generator to an adjacent phase of the APU generator using a switched connection.
Dependencies are inferred from the claim text.