Core structure
First Claim
Patent Images
1. A core comprising:
- a base having an outer edge and a top region, a first post disposed on the top region of the base at the outer edge, a second post disposed on the top region of the base at the outer edge, a third post disposed on the top region of the base at the outer edge, a shared common center portion disposed on the base, and a top disposed on the posts and opposite the base, wherein the first post and the center portion are separated on the base to thereby define a first window, the second post and the center portion are separated on the base to thereby define a second window, the third post and the center portion are separated on the base to thereby define a third window, and the top and center portions are spaced apart to thereby define an air gap.
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Abstract
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.
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Citations
37 Claims
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1. A core comprising:
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a base having an outer edge and a top region, a first post disposed on the top region of the base at the outer edge, a second post disposed on the top region of the base at the outer edge, a third post disposed on the top region of the base at the outer edge, a shared common center portion disposed on the base, and a top disposed on the posts and opposite the base, wherein the first post and the center portion are separated on the base to thereby define a first window, the second post and the center portion are separated on the base to thereby define a second window, the third post and the center portion are separated on the base to thereby define a third window, and the top and center portions are spaced apart to thereby define an air gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A power converting apparatus having at least two cells, the power converting apparatus comprising:
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a core having a base, a top, a center portion and a first post, a second post and a third post, first and second windings around the first post, a third winding around the second post, a fourth winding around the third post, and a control circuit connected to said windings and having a first phase and a second phase adapted to provide current, wherein a first cell is defined by the first winding, the first post, the third winding, the second post, the base and the center portion, and a second cell is defined by the second winding, the first post, the fourth winding, the third post, the base and the center portion. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A power converter, comprising:
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a core having eight primary windings and eight secondary windings in an arrangement on the core, the arrangement defining four cells each comprising two primary windings and two secondary windings, and a control circuit having an output connected to the primary windings, the control circuit having at least two phases in which current runs from the output in a first direction during a first phase and a second direction in a second phase, two of the cells being powered by the control circuit during the first phase and the other two cells being powered by the control circuit during the second phase.
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Specification