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US 2019/0199081 A1Published application
Arc detection based on variance of current flow
AssigneeLittelfuse, Inc.
InventorsMohamed Ayeb, Ludwig Brabetz, Leonard Gysen, Markus Horn, Tobias Kerner, Carsten Fock
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Abstract
Arc fault detection devices and methods are described current between a source and a load is periodically measured. A variance of the periodically measured current values is derived and an arc fault can be detected abased on the derived variance. A variance interval signal can be incremented based on the derived variance increasing above a threshold level and a low pass filter arranged to detect an arc based on the incremented variance interval signal.
Claims20
An apparatus comprising:
- a processor;
- and
- memory comprising instructions, which when executed by the processor cause the processor to:
- receive, from a current sensor, a plurality of sensed current values;
- derive a variance between the plurality of sensed current values;
- and
- generate a signal indicative of an arc fault based in part on the variance.
4 more elements
A system comprising:
- a current sensor to couple to a source and at least one load;
- logic, at least a portion of which is in hardware, the logic to:
- receive, from the current sensor, a plurality of current values corresponding to current between the source and the at least one load;
- derive a variance between the plurality of sensed current values;
- and
- generate a signal indicative of an arc fault based in part on the variance.
3 more elements
A method comprising:
- measuring, via a current sensor coupled to a source and at least one load, a plurality of sensed current values;
- deriving a variance between the plurality of current values;
- and
- generating a signal indicative of an arc fault based in part on the variance.
1 more element
Dependencies are inferred from the claim text.