NON-CONTACT POWER FEEDING APPARATUS
First Claim
1. A non-contact power feeding apparatus adapted to feed power through an air gap, with no contact, by electromagnetic induction, comprising a power transmission coil of a power feeding circuit and a power receiving coil of a power receiving circuit, wherein the power transmission coil and the power receiving coil are in proximity to and face each other across an air gap, the power transmission coil and the power receiving coil each comprise a respective planar assembly of a respective plurality of unit coils, each of the unit coils being formed in a spirally wound flat structure and being juxtaposed to another of the unit coils of the respective power transmission or power receiving coil and the unit coils of each of the power transmission and power receiving coils being aligned with each other, and the unit coils being so electrically connected that direction of an electric current in each of the unit coils is opposite to that in each of the unit coils to which it is juxtaposed.
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Accused Products
Abstract
In a non-contact power feeding apparatus of the present invention, power is fed through an air gap from a power transmission coil of a power feeding side circuit to a power receiving coil of a power receiving side circuit, which are closely located to face each other, based on a mutual induction effect of electromagnetic induction. The power transmission coil and the power receiving coil are respectively composed of a planar assembly of a number of unit coils. Each unit coil is formed in a spirally wound flat structure, wherein the direction of an electric current is set in reverse to make the north and south magnetic poles reverse between each unit coil which is juxtaposed to another to directly come into line. As a result, the unit coils, which are juxtaposed to another to directly come into line, are provided in such a manner that an overlapping area of a respectively formed magnetic field cancels another out to be offset
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Citations
8 Claims
- 1. A non-contact power feeding apparatus adapted to feed power through an air gap, with no contact, by electromagnetic induction, comprising a power transmission coil of a power feeding circuit and a power receiving coil of a power receiving circuit, wherein the power transmission coil and the power receiving coil are in proximity to and face each other across an air gap, the power transmission coil and the power receiving coil each comprise a respective planar assembly of a respective plurality of unit coils, each of the unit coils being formed in a spirally wound flat structure and being juxtaposed to another of the unit coils of the respective power transmission or power receiving coil and the unit coils of each of the power transmission and power receiving coils being aligned with each other, and the unit coils being so electrically connected that direction of an electric current in each of the unit coils is opposite to that in each of the unit coils to which it is juxtaposed.
Specification