WIRELESS POWER TRANSFER SYSTEMS CONTAINING FOIL-TYPE TRANSMITTER AND RECEIVER COILS

摘要

Wireless power transfer systems include at least one foil-type transmitter/receiver coil with a plurality of turns, which is configured to reduce eddy current losses therein when energized to conduct an alternating current that supports inductive power transfer including coil-to-coil power electrical transfer, inductive heating, etc. The plurality of turns includes at least an outermost turn with a first arcuate-shaped corner having a concave inner surface, which faces an immediately adjacent one of the plurality of turns. The immediately adjacent one of the plurality of turns may also have a second arcuate-shaped corner with a concave inner surface facing an innermost one of the plurality of turns. The first arcuate-shaped corner may have a non-uniform radius of curvature and/or an innermost one of the plurality of turns may have an arcuate-shaped corner, which is a mirror image of the first arcuate-shaped corner when the coil is view in transverse cross-section.

主权项

1. A wireless power transfer system, comprising:
a foil-type transmitter coil having a plurality of turns including at least an outermost turn with at least a first arcuate-shaped corner having a concave inner surface facing a convex outer surface of an immediately adjacent one of the plurality of turns, said immediately adjacent one of the plurality of turns having at least a second arcuate-shaped corner with a concave inner surface facing a concave outer surface of an innermost one of the plurality of turns having an arcuate-shaped corner that is a mirror image of the first arcuate-shaped corner; and wherein a middle one of the plurality of turns has flat inner and outer surfaces that face the innermost one of the plurality of turns and the outermost turn, respectively.