Wireless energy transfer antennas and energy charging systems
First Claim
1. A wireless energy system for charging a battery in a vehicle comprising:
- a power source;
a transmitting antenna at a charging station connected to receive electrical energy from said power source;
a battery in a vehicle; and
a receiving antenna in said vehicle and connected to supply received electrical energy to said battery;
wherein the transmitting and receiving antennas are configured as substantially identical helixes of dual parallel wires;
said system further comprising means for varying the configurations of said antennas in concert between folded dipole and normal dipole configurations to achieve high efficiency energy transfer between said transmitting antenna and said vehicle antenna over a range of distances between said antennas.
2 Assignments
0 Petitions
Accused Products
Abstract
A resonant wireless energy transfer system comprises first and second antennas made up of dual parallel wire helixes wherein the wires are terminated by short wires. Voltage controlled variable capacitors are connected into the antennas to permit progressive variation between folded dipole and normal dipole operating modes such that optimum energy transfer can be achieved between the antennas over a wide range of antenna separation distances. A vehicle battery charging system using the above-described antennas is provided including an installation which allows purchase of battery charging power by members of the general public. In-vehicle energy transfer for sensors, computers, cell phones and the like is also described.
23 Citations
9 Claims
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1. A wireless energy system for charging a battery in a vehicle comprising:
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a power source; a transmitting antenna at a charging station connected to receive electrical energy from said power source; a battery in a vehicle; and a receiving antenna in said vehicle and connected to supply received electrical energy to said battery; wherein the transmitting and receiving antennas are configured as substantially identical helixes of dual parallel wires;
said system further comprising means for varying the configurations of said antennas in concert between folded dipole and normal dipole configurations to achieve high efficiency energy transfer between said transmitting antenna and said vehicle antenna over a range of distances between said antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless energy charging station comprising:
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a power source; an antenna comprising a helix of dual, parallel wires; and variable capacitors connected between the wires for changing the configuration of the antenna as between folded dipole and normal dipole configurations;
said station further comprising control means for sensing the efficiency level of a transfer of energy from said antenna to a receiving antenna in a vehicle and controlling said variable capacitors to reconfigure said antennas according to the sensed efficiency level. - View Dependent Claims (9)
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Specification