Inverter bridge controller implementing short-circuit protection scheme
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United States of America Patent
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Sep 19, 2006
Grant Date -
Dec 22, 2005
app pub date -
Jun 22, 2004
filing date -
Jun 22, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A fault handling system for short circuit recovery in three-phase multiple-level inverter bridges, used to drive inductive loads, which waits for either desaturation of switches or expiration of a delay period based upon an amount of time before saturated switches are damaged before commanding off switches that are saturated, and which artificially creates a dead-short across the three-phase output to force switches conducting a fault current to desaturate. By delaying the switching-off of the inverter bridge during a fault, waiting for desaturation to occur, the statistical likelihood of switch survival is improved.
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