WIRELESS ELECTRIC FIELD POWER TRANSFER SYSTEM, METHOD, TRANSMITTER AND RECEIVER THEREFOR
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Abstract
A wireless electric field power transmission system comprises: a transmitter comprising a transmitter antenna, the transmitter antenna comprising at least two conductors defining a volume therebetween; and at least one receiver, wherein the transmitter antenna transfers power wirelessly via electric field coupling when the at least one receiver is within the volume.
24 Citations
23 Claims
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1. (canceled)
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2. A transmitter for wirelessly transmitting power, the transmitter comprising:
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an antenna for creating an electric field, the antenna comprising at least one conductor; a coil connected to the antenna; and a resonator connected to the coil for resonating the coil and the conductor at a resonant frequency, the resonator comprising a tuning circuit having a sensor configured to sense an output at the antenna, wherein the antenna receives a feedback signal based on the sensed output. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of tuning a transmitter for wirelessly transmitting power, the method comprising:
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providing an antenna for creating an electric field, the antenna connected to a coil, wherein the antenna comprises at least one conductor; resonating the conductor and the coil at a start-up frequency; and sensing an output at the antenna. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A wireless electric field power transmission system for powering a load, the system comprising:
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a transmitter for wirelessly transmitting power, the transmitter comprising; a transmitter antenna for creating an electric field, the transmitter antenna comprising at least one conductor; a transmitter coil connected to the transmitter antenna; and a resonator connected to the transmitter coil for resonating the transmitter coil and the conductor of the transmitter antenna at a resonant frequency, the resonator comprising a tuning circuit having a sensor configured to sense an output at the transmitter antenna, wherein the antenna receives a feedback signal based on the sensed output; and a receiver for receiving wirelessly transmitted power from the transmitter, the receiver comprising; a receiver antenna comprising at least two conductor, the receiver antenna configured to receive power from the transmitter antenna via resonant electric field coupling; a receiver coil connected to the receiver antenna; and a power harvester connected to the receiver coil, the power harvester configured to extract power received by the receiver antenna.
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Specification