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US 6,144,276 AGranted
Planar transformer having integrated cooling features
AssigneeMotorola, Inc.
InventorJames Roger Booth
Life of this patent
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Abstract
A planar electromagnetic device, such as a planar transformer or planar inductor, is provided with features for cooling that are formed integrally with the windings of the planar device. In a preferred embodiment the planar device uses winding layers (200) having fin portions (116). In a first alternative embodiment a helical winding (500) is formed from a winding stamping (400) having fin portions (412). In a second alternative embodiment, tube portions (802) are formed in a winding stamping (700) used to form a helical winding.
Claims4
A planar electromagnetic device, comprising:
- a helical winding formed from a folded winding stamping, the winding stamping formed from an insulated conductor having parallel fold portions and alternating connector portions between the parallel fold portion, the winding stamping further comprising cooling portions for providing cooling features upon being formed into the helical winding, wherein the cooling portions are tube portions formed in the fold portions;
- and
- a core disposed over the helical winding.
Dependencies are inferred from the claim text.