Integrated planar transformer and inductor assembly
First Claim
1. An integrated transformer and inductor assembly comprising:
- a transformer core having a central gap;
(PA) planar interleaved primary and secondary winding separated by insulating layers disposed within the transformer core; and
(PA) a concentric inductor winding disposed adjacent the center of the core between the core and the primary and secondary windings, which surrounds a substantial portion of the central core and the central gap, and which is connected in parallel with the primary or secondary windings.
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Abstract
An integrated transformer and inductor assembly for use in soft switching or resonant power converters, and the like. The assembly has a planar structure and includes a planar transformer and a parallel inductor. The assembly has a transformer core with a central gap. Planar interleaved primary and secondary winding are separated by insulating layers and are disposed within the transformer core. The parallel inductor is provided by a concentric inductor (reactive) winding disposed adjacent the center of the transformer core, which may be wound around a bobbin. The concentric inductor (reactive) winding carries inductor current, while load current flows mostly in the planar windings. Loss due to magnetizing current is substantially reduced in the present invention.
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Citations
7 Claims
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1. An integrated transformer and inductor assembly comprising:
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a transformer core having a central gap;
(PA)planar interleaved primary and secondary winding separated by insulating layers disposed within the transformer core; and
(PA)a concentric inductor winding disposed adjacent the center of the core between the core and the primary and secondary windings, which surrounds a substantial portion of the central core and the central gap, and which is connected in parallel with the primary or secondary windings. - View Dependent Claims (2, 3, 4)
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5. An integrated transformer and inductor assembly comprising:
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a transformer core having a central gap;
planar interleaved primary and secondary winding separated by insulating layers disposed within the transformer core;
a bobbin disposed around the center of the core; and
a concentric inductor winding wound around the bobbin that is disposed between the core and the primary and secondary windings, which surrounds a substantial portion of the central core and the central gap, and which is connected in parallel with the primary or secondary windings. - View Dependent Claims (6, 7)
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Specification