Electric power conversion systems – Current conversion – Including automatic or integral protection means
Reexamination Certificate
2005-06-21
2005-06-21
Sterrett, Jeffrey (Department: 2838)
Electric power conversion systems
Current conversion
Including automatic or integral protection means
Reexamination Certificate
active
06909620
ABSTRACT:
An inverter phase leg with shoot-through protection that may be used in inverters includes a high side semiconductor switch and a low side semiconductor switch which are connected across DC supply lines and which have an output node between them. A series diode or connector switch is connected between the output node and the low side switch, and the junction between the diode or connector switch and the low side switch is electrically connected directly to the gate of the high side switch. If the low side switch is still conducting at the time that the high side switch receives a command to turn on, the gate of the high side switch will be biased so that the switch is held off until current stops flowing through the low side switch and, conversely, if the high side switch is still on at the time that the low side switch is turned on, the gate of the high side switch will be biased to insure its immediate turn-off, thereby preventing a shoot-through condition under which the high side and low side switches are turned on at the same time.
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Jahns Thomas M.
Park Shihong
Foley & Lardner LLP
Sterrett Jeffrey
Wisconsin Alumni Research Foundation
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