Near field power coupling system
First Claim
1. An electromagnetic near field power coupling system for noncontact, electric power coupling, comprising:
- a transmitter comprised of;
a series of phase shifted power sources,a series of near field generating elements, sequentially connected to said power sources in order of increasing phase, anda receiver comprised of;
a load having a first and a second terminal, a first near field receiving element being coupled to the first terminal of said load,a second near field receiving element being coupled to the second terminal of said load, said receiver being near field coupled to at least two of said generating elements;
wherein said transmitter and said receiver form a complete circuit with both terminals of said load being coupled by electromagnetic near field to said power sources with said load being mechanically independent of said generating elements.
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Accused Products
Abstract
A system for power coupling independent of the position of the receiver over a surface. This is achieved by developing a spatially-dependent phase shift in the electromagnetic field generated by the power transmitter. The power inputs to the power receiver are then driven 180 degrees out of phase at any coordinate in the plane over the surface. An array of elements is placed in a plane below a surface and driven with a series of alternating current power sources. Consecutive adjacent elements across the area of the plane are driven with uniformly increasing phase shift. An integral multiple of adjacent consecutive elements results in a 180 degree phase shift. Pairs of field receiving elements in a power receiver are dimensioned to receive fields that are separated by 180 degrees of phase. Utilizing the technique of the invention, power coupling independent of the position or rotational orientation of the power receiver can be obtained.
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Citations
14 Claims
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1. An electromagnetic near field power coupling system for noncontact, electric power coupling, comprising:
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a transmitter comprised of; a series of phase shifted power sources, a series of near field generating elements, sequentially connected to said power sources in order of increasing phase, and a receiver comprised of; a load having a first and a second terminal, a first near field receiving element being coupled to the first terminal of said load, a second near field receiving element being coupled to the second terminal of said load, said receiver being near field coupled to at least two of said generating elements; wherein said transmitter and said receiver form a complete circuit with both terminals of said load being coupled by electromagnetic near field to said power sources with said load being mechanically independent of said generating elements. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electromagnetic near field power coupling system for noncontact, position independent, power coupling to a mobile load, comprising:
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a series of phase shifted power sources, a series of electromagnetic near field generating inductive windings, sequentially connected to said power sources in order of increasing phase, and an inductive power receiving element connected to said mobile load and coupled to at least two of said generating inductive windings; wherein said receiving element and said mobile load are mechanically independent of said electromagnetic field generating inductive windings. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification