H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/55
H02M 7/537 (2006.01)
Patent
CA 1157519
Abstract of the Disclosure An inverter drive circuit is disclosed wherein the _, inverter is a pulse width modulated inverter. The inverter includes a regulator circuit to regulate the width of the pulses which control the conduction of first and second controllable semiconductors in the inverter. The regulator is controlled by the output of the inverter in a feedback arrangement with a current limit circuit as well as an instant current limit to limit the output. A turn-on circuit is utilized to act through a drive transformer to turn on the controllable semiconductors as required. A turn-off circuit acts on the drive transformer and turns off the turn-on signal. A set and reset circuit is provided using first and second drive transformers for first and second controllable semiconductors in the inverter. One transformer is set in order to provide the turn-on and then this transformer is energized in the opposite direction to saturation to obtain a reset. A decoupling diode is provided between the drive transformer and the control electrode of the semiconductor so that when the decoupling diode ceases conduction then reverse voltage developed by the drive transformer is not applied to the control electrode of the semiconductor. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applica- tions, and is not to be construed as a limitation on the scope of the claimed subject matter.
409889
Kamiller Neil
Paradissis Pantelis P.
Reliance Electric Company
Ridout & Maybee Llp
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