Low profile magnetic component with planar winding structure having reduced conductor loss
AssigneeKoninklijke Philips Electronics N.V.
InventorsRonald M. Wolf, Glenn R. Skutt, Liming Ye
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Abstract
A planar magnetic winding structure such as a transformer or inductor having an air gap in the core has a “keep away” region of 2 to 3 times the gap height in which there are no windings, reducing high frequency winding losses by 35 percent or more, without appreciable increases in low frequency winding losses. Such structures are useful, for example, in electronic ballasts for the lighting industry.
Claims13
A planar magnetic winding structure comprising a core and a stack of winding layers including one or more turns, the core comprised of two or more core components having mutually facing planar surfaces separated by at least one air gap g, and all surfaces of the winding layers are separated from the air gap by a distance of at least 2 g.
Dependencies are inferred from the claim text.