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US 8,941,265 B2Granted
Minimal interruption DC power supply
AssigneeHamilton Sundstrand Corporation
InventorsWayne H. Oldenburg, Cecil W. Sims
Life of this patent
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Abstract
A DC power distribution system and method includes a solid state remote power controller that connects a switching power source to a DC bus when the DC bus is switching power sources thereby providing a nearly uninterrupted power supply to the DC bus.
Claims21
A method for minimal interruption power source switching comprising the steps of:
- disconnecting a first power source from a DC bus, thereby removing power from said DC bus;
- connecting a second power source to said DC bus, thereby providing power to said DC bus;
- monitoring at least one power characteristics of the DC bus and a plurality of DC bus inputs;
- determining if a fault condition is present on the DC bus by comparing a DC bus voltage to a low voltage threshold, comparing a DC bus input current to a high current threshold, and determining that a fault condition exists in said DC bus when the DC bus voltage is under the low voltage threshold and the DC bus input current is over the high current threshold;
- and
- activating a solid state remote power controller (SSRPC) during the step of disconnecting the first power source and deactivating the SSRPC during the step of connecting the second power source, thereby providing power to said DC bus during a time period between performance of the steps of disconnecting the first power source from said DC bus and connecting the second power source to said DC bus.
3 more elements
A minimally interruptible power source comprising:
- a DC power bus;
- a controller, coupled to said DC power bus, said controller being capable of controlling power functions of said DC power bus, wherein the controller includes a DC bus voltage measurement input and at least one DC source current input, and wherein the controller is operable to detect a fault when the DC bus voltage input is below a low voltage threshold and at least one DC source current input is above a high current threshold;
- a solid state remote power controller (SSRPC) connecting said DC power bus to a switching power source;
- a plurality of electrical contactors, each of said contactors connecting one of a plurality of primary power sources to said controller;
- and
- a communication line for connecting said controller to at least one other controller within a power system.
3 more elements
A DC power distribution system comprising:
- a plurality of DC power buses, each of said DC power buses having a controller capable of controlling power functions of said DC power bus, a solid state remote power controller (SSRPC) connecting said DC power bus to a switching power source, a plurality of electrical contactors, each of said contactors connecting one of a plurality of primary power sources to said controller, a communication line for connecting said controller to at least one other controller within a power system;
- a plurality of power generators, each of said power generators being capable of providing power to at least one of said plurality of DC power buses;
- and
- wherein each of said controllers includes a DC bus voltage input and at least one DC source current input and wherein each of said controllers is operable to detect a fault when the DC bus voltage input is below a low voltage threshold and at least one DC source current input is above a high current threshold.
1 more element
Dependencies are inferred from the claim text.