Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1978-07-28
1980-05-20
Miller, J. D.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 26, 363 41, 363132, H02P 1318
Patent
active
042042666
ABSTRACT:
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 applications, and is not to be construed as a limitation on the scope of the claimed subject matter.
REFERENCES:
patent: 3715648 (1973-02-01), Kernick et al.
patent: 3768000 (1973-10-01), Bates
patent: 4002963 (1977-01-01), Hunter
patent: 4051426 (1977-09-01), Wood
patent: 4099225 (1978-07-01), Nygaard
Kammiller Neil
Paradissis Pantelis P.
Granger Louis V.
Lorain Products Corporation
Miller J. D.
Rickin Michael M.
Wong Peter S.
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