Surge protection and failsafe circuit for DC-DC converter
AssigneeHamilton Sundstrand Corporation
InventorsRajkumar Sengodan, Ann Freida F
Life of this patent
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Abstract
A Direct Current (DC)-DC converter includes an input capacitor connected across a positive input terminal and a return input terminal. A DC-DC converter circuit is connected across the positive input terminal and the return input terminal. A current limiting failsafe circuit includes a current limiting portion connected across the positive input terminal and the return input terminal and a failsafe portion connected to a sensed voltage output. The failsafe portion is configured to control a current limit function of the current limiting portion and configured to force the DC-DC converter circuit into an off state in response to retripping of the current limiting portion.
Claims18
A Direct Current (DC)-DC converter comprising:
- an input capacitor connected across a positive input terminal and a return input terminal;
- a DC-DC converter circuit connected across the positive input terminal and the return input terminal;
- a current limiting failsafe circuit including a current limiting portion connected across the positive input terminal and the return input terminal, and a failsafe portion connected to a sensed voltage output, the failsafe portion being configured to control a current limit function of the current limiting portion and configured to force the DC-DC converter circuit into an off state in response to retripping of the current limiting portion.
An aircraft power distribution system comprising:
- at least one engine mounted electric generator configured to convert rotational energy within the engine to electrical energy;
- a power distribution controller configured to receive the electrical energy from the electric generator, convert the electrical energy to direct current (DC) energy, provide the DC energy to multiple electric subsystems within the aircraft, wherein at least one of the electric subsystems is configured to convert the received DC power to a different DC voltage and current using a DC-DC converter;
- and
- wherein the DC-DC converter comprises a current limiting failsafe circuit including a current limiting portion connected across the positive input terminal and the return input terminal, and a failsafe portion connected to a sensed voltage output, the failsafe portion being configured to control a current limit function of the current limiting portion and configured to force the DC-DC converter circuit into an off state in response to repeated retripping of the current limiting portion.
Dependencies are inferred from the claim text.