Packaging and Details of a Wireless Power device
First Claim
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1. A wireless power system, comprising:
- a magnetically resonant antenna including an inductor having a variable inductance and a capacitor, having a variable capacitance;
a power conversion circuit, coupled to said magnetically resonant antenna, and connecting with a magnetically resonant wireless power via said antenna, said circuit determining a measure of wireless power transfer, and producing a control signal indicative of said measure about how well information from said wireless power is being coupled, and provides a control signal to said magnetically resonant antenna, and wherein said magnetically resonant antenna adjusts at least one of said inductor and said capacitor value based on said signal.
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Abstract
A wireless power system includes a power source, power receiver, and components thereof. The system can also include a parasitic antenna that can improve the coupling to the power source in various modes. The antenna can have both a variable capacitor and a variable inductor, and both of those can be changed in order to change characteristics of the matching.
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Citations
40 Claims
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1. A wireless power system, comprising:
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a magnetically resonant antenna including an inductor having a variable inductance and a capacitor, having a variable capacitance; a power conversion circuit, coupled to said magnetically resonant antenna, and connecting with a magnetically resonant wireless power via said antenna, said circuit determining a measure of wireless power transfer, and producing a control signal indicative of said measure about how well information from said wireless power is being coupled, and provides a control signal to said magnetically resonant antenna, and wherein said magnetically resonant antenna adjusts at least one of said inductor and said capacitor value based on said signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless power system, comprising:
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a magnetically resonant antenna tuned for wireless power, said antenna including an inductor and a capacitor, wherein said inductor is a variable inductor that includes a ferrite core that is moved relative to another part of the inductor, and wherein a movement of said ferrite core changes an amount of inductance in the antenna; and a power circuit that processes electric power, connected to said magnetically resonant antenna. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A wireless power system, comprising:
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an antenna coil; a capacitor, in series with said antenna coil, said antenna coil and capacitor tuned to receive wireless transmission of power; a power converting circuit, coupled to said antenna coil, and receiving power therefrom, and converting said power; a tunable load impedance, in series with said coil and capacitor, said tunable load impedance having a variable impedance; and a circuit which varies said tunable load impedance, in order to improve matching with said capacitor and said coil.
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18. A method of coupling wireless power, comprising:
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varying both a capacitance and an inductance of a magnetically resonant antenna that is formed of a coil part forming an inductor, and a variable capacitance; coupling power via said magnetically resonant antenna to or from a remote source, to transmit power wirelessly or to receive power wirelessly using said magnetically resonant antenna, determining a measure of wireless power transfer being carried out by said transmit or said receive, and producing a control signal indicative of said measure about how well information from said wireless power is being coupled; and providing a control signal to said magnetically resonant antenna, and wherein said magnetically resonant antenna causes one of said capacitance or said inductance to be varied based on said signal. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method, comprising:
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transmitting power wirelessly from a transmitter to a receiver; detecting, in the transmitter, a change in coupling factor between said transmitter and said receiver; based on said detecting, adapting the transmitter by changing a polarization of said transmitting. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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34. A method, comprising:
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transmitting power wirelessly from a transmitter to a receiver; detecting, in the transmitter, tuning information for said transmitter that depends on loading by said receiver; and based on said detecting, adapting the transmitter by tuning said transmitter in a way that improves a coupling to said receiver as a function of said loading. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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Specification