Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1981-03-11
1982-09-28
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363 26, 363 80, 363 97, H02P 1322
Patent
active
043521533
ABSTRACT:
A digital controller for a power supply which includes a transformer having primary and secondary windings and switching transistors for switching a current from a D.C. input means through the winding of the transformer to an output circuit. Pulse-width modulated control signals are used to control the switching operation of the transistors. In order to correct for an imbalance in the operation of the transistors, an error signal is developed which alters the value of the duty cycle of the transistors forcing the B-H curve of the transformer to oscillate between upper and lower threshold values.
REFERENCES:
patent: 3859583 (1975-01-01), Reed
patent: 3873903 (1975-03-01), Koetch et al.
patent: 4291366 (1981-09-01), Nelson
Beha Jr. William H.
Cavender J. T.
Hawk Jr. Wilbert
Lavin Richard W.
NCR Corporation
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