Electric power conversion systems – Current conversion – With starting arrangement
Patent
1978-12-19
1980-07-29
Shoop, William M.
Electric power conversion systems
Current conversion
With starting arrangement
363 41, H02M 700
Patent
active
042153921
ABSTRACT:
A high frequency inverter power supply including a transformer having a primary and a secondary with the secondary having a first winding and a plurality of second windings to suppy D.C. output voltages to a load. Switching transistors are used to switch a current from a D.C. input means through the primary to produce an alternating voltage across the first winding and the plurality of second windings. A rectifier coupled to the first winding of the secondary supplies power to a control means which generates first and second outputs for controlling the switching transistors, respectively. A start-up circuit provides temporary power to the control means until the rectifier supplies the power after which the start-up circuit is shut off. The control means (which is essentially a pulse width modulator) has an input thereto which is coupled to one of the output voltages for regulating these voltages. A photocoupler provides isolation between secondary and primary of the transformer.
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IBM Technical Disclosure Bulletin, "Power Supply with Optical Isolator", A. J. Bowen, G. M. Heiling, L. T. Lemke, vol. 14, No. 11, Apr. 1972, p. 3220.
IBM Technical Disclosure Bulletin, "Inverter Start Circuit", W. S. Duspiva, vol. 17, No. 3, Aug. 1974, pp. 915-916.
"Simplifying Converter Design with a New Integrated Regulating Pulse Width Modulator", Bob Mammano, Published by Silicon General Inc., Jun. 1976, (Westminster, California).
Cavender J. T.
NCR Corporation
Sessler Jr. Albert L.
Shoop William M.
Wargo Elmer
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