Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Reexamination Certificate
2007-11-21
2010-10-19
Fureman, Jared J (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
Reexamination Certificate
active
07817392
ABSTRACT:
An Insulated Gate Bipolar Transistor (IGBT) fault protection system is provided. The fault protection system includes a GVPA, a gate voltage clamper, and a soft-off unit. The GVPA analyzes a gate voltage pattern of an IGBT to determine whether or not a fault has occurred. The gate voltage clamper prevents an increase in a gate voltage of the IGBT according to an output signal that the GVPA outputs when a fault has occurred. The soft-off unit softly turns off the IGBT according to an output signal that the GVPA outputs when a fault has occurred.
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Jun-Bae Lee et al., “Gate Voltage Pattern Analyzer for Short-Circuit Protection in IGBT Inverters,” 4 pages, Bucheon-Si, Korea.
Chung Dae-Woong
Lee Jun-Bae
Suh Bum-Seok
Fairchild Korea Semiconductor Ltd.
Fureman Jared J
Hoang Ann T
Sidley Austin LLP
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