SWITCHING DEVICE AND METHOD FOR PROTECTING AN ELECTRICAL LOAD AGAINST OVERCURRENT
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 27, 2024
filing date -
Sep 27, 2024
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Abstract
A switching device protects an electrical load against overcurrent. A load current path from a current source to the load is connected through a semiconductor switch. In the on-state of the switch, the current is permitted to flow. In the off-state, the load current is blocked. A control circuit is configured to switch the semiconductor switch in response to a switching signal. The current in the load current path is measured. A controller execute an individual function or a combination of two or more predefined functions depending on an operating mode of the electrical load. The functions compare a current intensity and/or a temporal current profile of the current through the load current path with defined threshold values. The control circuit is driven by the switching signal that depends on one or more results of the executed functions to selectively switch off the semiconductor switch.
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