Means for producing and controlling dead-time of the switching t

Details Means for producing and controlling dead-time of the switching t Means for producing and controlling dead-time of the switching t

1978-03-23

1980-01-29

Shoop, William M.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 97, 363134, H02M 3335

Patent

active

041864344

ABSTRACT:
A driver circuit is provided for producing and controlling the dead-time of witching transistors in DC-to-DC or DC-to-AC converter circuits to prevent cross conduction and/or to control the output voltage as a function of that dead-time. Driver transistors are switched alternately ON and OFF and drive the switching transistors through a capacitor-shunted transformer primary having a charging current applied to a center tap thereon to predictably control the gradual application to and removal of base drive from the switching transistors, thereby predictably controlling the dead-time of the switching transistors and in some applications, the output voltage of the converter circuit also. The charging current may be either manually or automatically varied to vary the dead-time as desired.

REFERENCES:
patent: 3351840 (1967-11-01), Yearley
patent: 3417311 (1968-12-01), Logan
patent: 3506908 (1970-04-01), Resch
patent: 3670234 (1972-06-01), Joyce

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