Process and system for emergency control of the switching of a power transistor
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United States of America Patent
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Issued Date -
Dec 23, 2004
app pub date -
Apr 6, 2004
filing date -
Apr 9, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
This invention relates to a process for emergency control of the switching of a power transistor in the case of dysfunction of this transistor, which comprises: a step for measuring a voltage between the collector and emitter of the power transistor, a step for temporal filtering of the measured signal, a step for detecting the abnormal operational state carried out from the values of the filtered signal, and a step for controlling the switching of the power transistor towards a safe state, triggered off immediately when an abnormal operational state is detected.
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