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US 12,399,231 B2Granted
Fault detection method and system therefor
AssigneeHamilton Sundstrand Corporation
InventorsRajkumar Sengodan, Saravanan Munusamy
Life of this patent
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Abstract
Fault detection system and method each includes a positive input line configured to connect between a voltage input and a load and a negative input line configured to connect between the voltage input and the load. A logic module is operatively connected to and/or configured to detect a fault (e.g., a short circuit) in either of the positive input line or the negative input line between the voltage input and the load.
Claims20
A fault detection system, comprising:
- a positive input line configured to connect between a voltage input and a load;
- a negative input line configured to connect between the voltage input and the load;
- a logic module configured to detect a fault in either of the positive input line or the negative input line between the voltage input and the load, the logic module including:
- a voltage bias input operatively connected to the positive input line configured to invert voltage from the positive input line if the fault has occurred;
- and
- a sensing network configured to sense a voltage of the positive input line and the negative input line at an input of the logic module, wherein the sensing network is configured to output a fault trigger to a control module to disconnect the voltage input from the positive input line and the negative input line if the fault is detected;
- a rectifier disposed between the voltage input and the logic module;
- and
- a contactor block disposed between the voltage input and the rectifier and operatively connected to the control module, the contactor block comprising one or more contactors for one or more phases, wherein one contactor is included for each phase.
6 more elements
A method for fault detection, comprising:
- detecting a fault in one or more of a positive input line or a negative input line using one or more current sense resistors, wherein:
- the positive input line is configured to connect between a voltage input and a load;
- the negative input line is configured to connect between the voltage input and the load;
- and
- a logic module is configured to detect the fault in either of the positive input line or the negative input line between the voltage input and the load, the logic module including:
- a voltage bias input operatively connected to the positive input line configured to invert voltage from the positive input line if the fault has occurred;
- and
- a sensing network configured to sense a voltage of the positive input line and the negative input line at an input of the logic module;
- outputting a fault trigger signal to a control module, using the sensing network, to disconnect the voltage input from the positive input line and the negative input line if the fault is detected;
- and
- controlling, with the control module, a contactor block disposed between the voltage input and the load to disconnect the voltage input from the positive input line and the negative input line based at least in part on the fault trigger signal by disconnecting a rectifier disposed between the contactor block and the load, the contactor block comprising one or more contactors for one or more phases, wherein one contactor is included for each phase.
8 more elements
Dependencies are inferred from the claim text.