Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1993-09-08
1996-01-16
Sterrett, Jeffrey L.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 95, 363 97, 363134, H02M 3335
Patent
active
054853621
ABSTRACT:
The present invention provides a resonant power converter for changing the magnitude of a DC voltage. The converter includes a common magnetic core with three legs (an "EE" core). The core has primary and secondary windings wound onto a first outside leg, and a tank winding and control windings wound onto a second outside leg. Control switch means are provided for effecting alternate pulses of current flow through the primary winding to effectuate alternate flux flow, the control switch means and the primary winding having a predetermined parasitic capacitance with a predetermined delay time between the termination of a given pulse and initiation of the succeeding pulse. The secondary windings are oriented to conduct alternately in phase with the alternate flux flow, there being inherent in the first leg of the transformer a magnetizing inductance, such that the magnetizing current will be great enough to charge said parasitic capacitance in a controlled fashion.
REFERENCES:
patent: 3365657 (1968-01-01), Webb
patent: 3694726 (1972-09-01), Cielo et al.
patent: 4415959 (1983-11-01), Vinciarelli
patent: 4774649 (1988-09-01), Archer
patent: 4796173 (1989-01-01), Steigerwald
patent: 4823249 (1989-04-01), Garcia
patent: 4864478 (1989-09-01), Bloom
patent: 4930059 (1990-05-01), Rutt
patent: 5073849 (1991-12-01), Morris
patent: 5177675 (1993-01-01), Archer
patent: 5208739 (1993-05-01), Sturgeon
Chryssis, "High-Frequency Switching Power Supplies: Theory And Design", McGraw Hill Book Co, Apr. 1989.
EOS Corporation
Sterrett Jeffrey L.
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