The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2002
Filed:
Nov. 21, 2000
William Hemena, Raleigh, NC (US);
Thai Quoc Ngo, Rochester, MN (US);
Scott Douglas Strand, Byron, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A dual forward power converter and method of operation thereof. The dual forward power converter includes first and second power transformers, where each of the power transformers has first and second primary windings of opposite polarity and a secondary winding. The dual forward power converter also includes first and second switches that alternatively couple the first primary windings of the first and second power transformers, respectively, to a source of input power. The first and second switches, in an advantageous embodiment, are Field Effect Transistors (FETs) and are driven in a complementary manner with substantially 50% duty cycles. The dual forward power converter further includes first and second coupling capacitors that couple the second primary windings of the first and second power transformers to the second and first switches, respectively, and are utilized to reset the first and second power transformers with minimum losses. In a related embodiment, the dual forward power converter includes third and fourth switches that are coupled to the secondary windings of the second and first power transformers, respectively, and are driven in a substantially identical manner as the second and first switches, respectively.