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US 2003/0197585 A1Published application
Core structure
AssigneeInnovative Technology Licensing, LLC
InventorsSriram Chandrasekaran, Vivek Mehrotra, Jian Sun
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AssigneeInnovative Technology Licensing, LLC
InventorsSriram Chandrasekaran, Vivek Mehrotra, Jian Sun
Estimating the term…
There is disclosed a core structure with a very low profile, high power density and lower losses. Higher core surface area and improved core utilization in terms of flux density are other desirable feature in the disclosed design. The disclosed design also allowed 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 also be effectively employed in vertically packaged power converters and modules.
A core comprising:
A power converting apparatus having at least two cells, the power converting apparatus comprising:
A power converter, comprising:
Dependencies are inferred from the claim text.
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By static converters: using transformers or inductors only
Cores, Yokes, or armatures: made from powder
Fixed transformers not covered by group H01F19/00: characterised by the structure
Fixed inductances of the signal type: with magnetic core
Term end not estimated
A portion of the disclosure of this patent document contains material which is subject to copyright protection. This patent document may show and/or describe matter which is or may become trade dress of the owner. The copyright and trade dress owner has no objection to the facsimile reproduction by any one of the patent disclosure as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyright and trade dress rights whatsoever.
1. Field of the Invention
The present invention relates to core structures.
The present invention will be described by way of exemplary embodiments, but not limitations, illustrated in the accompanying drawings in which like references denote similar elements.
FIG. 1 is an exploded side elevated view of a core having a rectangular design in accordance with the invention;
FIG. 2 is a top view of the core of FIG. 1;
Throughout this description, the embodiments and examples shown should be considered as exemplars, rather than limitations on the apparatus and methods of the present invention.
A core in accordance with the invention is useful in power modules and power converters. These power modules and power converters are well suited for low voltage, high current DC-DC converter applications. A core in accordance with the invention may have ultra-low profile magnetics, resulting in better utilization, higher inductance, improved efficiency and lower temperature. In typical E-cores, increased compactness results in decreased efficiency. In contrast, in a core of the invention, increased compactness may result in increased efficiency. Improved efficiency is an unexpected benefit of the invention.
Principals of the invention are described below with respect to a half-bridge current doubler rectifier application. The invention is, however, applicable to a wide variety of DC-DC converter topologies and control algorithms. The core of the invention may also be useful in other types of power converters and modules, such as AC-AC and AC-DC. The cellular structure also enables the use of interleaving with multi-phase DC-DC converters to further reduce the current and voltage ripple and higher integration levels for multiple output DC-DC converters with integrated magnetics.