Printed circuit transformer
First Claim
1. An apparatus comprising:
- a circuit board having apertures;
separate magnetic flux paths each forming a closed loop that passes through at least one of the apertures and surrounds an interior space, the flux paths including portions that lie within magnetically permeable core pieces, at least two of the flux paths being oriented so that there is a straight line in the circuit board that passes through the interior spaces of the two flux paths without passing through any of the apertures that are included in the paths, an electrically conductive primary winding having a first segment that passes through the interior spaces of the permeable paths and a second segment located outside of the interior spaces; and
two or more electrically conductive secondary windings.
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Accused Products
Abstract
A circuit board has apertures. Separate magnetic flux paths each form a closed loop that passes through at least one of the apertures and surrounds an interior space. The flux paths comprising portions that lie within magnetically permeable core pieces. At least two of the flux paths are oriented so that there is a straight line in the circuit board that passes through the interior spaces of the two flux paths without passing through any of the apertures that are included in the paths. An electrically conductive primary winding having a first segment that passes through the interior spaces of the permeable paths and a second segment located outside of the interior spaces. There are two or more electrically conductive secondary windings.
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Citations
21 Claims
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1. An apparatus comprising:
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a circuit board having apertures;
separate magnetic flux paths each forming a closed loop that passes through at least one of the apertures and surrounds an interior space, the flux paths including portions that lie within magnetically permeable core pieces, at least two of the flux paths being oriented so that there is a straight line in the circuit board that passes through the interior spaces of the two flux paths without passing through any of the apertures that are included in the paths, an electrically conductive primary winding having a first segment that passes through the interior spaces of the permeable paths and a second segment located outside of the interior spaces; and
two or more electrically conductive secondary windings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus comprising:
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a circuit board having apertures;
separate magnetic flux paths each forming a closed loop that passes through at least one of the apertures and surrounds an interior space, the flux paths comprising portions that lie within magnetically permeable core pieces, at least two adjacent ones of the flux paths being oriented so that there is a straight line in the circuit board that passes through the interior spaces of the two flux paths without passing through any of the apertures that are included in the paths, an electrically conductive primary winding in the form of a loop having a first segment that passes through the interior spaces of the permeable paths and a second segment located outside of the interior spaces; and
two or more electrically conductive secondary windings on at least a second layer of the circuit board, each of the secondary windings comprising a first segment that passes through fewer interior spaces than does the primary winding, each of the secondary windings comprises a first segment that overlays a first segment of the primary winding and a second segment that overlays a second segment of the primary winding, at least two of the secondary windings connected in parallel, connections to the primary winding being made along an edge of the circuit borad that is on a different side of the apparatus from an edge along which connections are made to at least one of the secondary windings. - View Dependent Claims (18, 19, 20)
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21. A circuit comprising:
electrical elements forming a series-resonant full-bridge converter, the elements including a transformer comprising a circuit board having apertures;
separate magnetic flux paths each forming a closed loop that passes through at least one of the apertures and surrounds an interior space, the flux paths comprising portions that lie within magnetically permeable core pieces, at least two of the flux paths being oriented so that there is a straight line in the circuit board that passes through the interior spaces of the two flux paths without passing through any of the apertures that are included in the paths, an electrically conductive primary winding having a first segment that passes through the interior spaces of the permeable paths and a second segment located outside of the interior spaces; and
two or more electrically conductive secondary windings.
Specification