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:
May. 16, 2006
Filed:
Nov. 21, 2002
Jian Sun, Clifton Park, NY (US);
Xiukuan Jing, Camarillo, CA (US);
Sriram Chandrasekaran, Burbank, CA (US);
Vivek Mehrotra, Newbury Park, CA (US);
Jian Sun, Clifton Park, NY (US);
Xiukuan Jing, Camarillo, CA (US);
Sriram Chandrasekaran, Burbank, CA (US);
Vivek Mehrotra, Newbury Park, CA (US);
ColdWatt, Inc., Austin, TX (US);
Abstract
There is disclosed a core structure with a very low profile, high power density and lower losses. The disclosed design allows for a larger core area where the DC fluxes are added, thereby reducing the air-gap requirements in the cores derived from low saturation density materials such as ferrites. The cellular nature of the design can be effectively employed in vertically packaged power converters and modules. Also disclosed is a DC-DC converter topology which preferably employs the disclosed core. N AC drive voltages drive N current doubler rectifiers (CDRs) in accordance with the symmetric modulation scheme; each CDR provides two rectified output currents to an output node. Each AC drive voltage has a switching period T. The drive voltages are phase-shifted by T/(2*N), such that the rectified output currents of the CDRs are interleaved, thereby reducing output voltage ripple.