Wireless power system and proximity effects
First Claim
Patent Images
1. A wireless power reception system, comprising:
- a receiver coil disposed about a perimeter of a mobile device; and
a wireless power receiver circuit coupled to the receiver coil, the wireless power receiver circuit and the receiver coil configured to receive power via a wireless field at a first frequency, the received wireless power sufficient to charge or power a load, the wireless power receiver circuit and the receiver coil having an inductance and a capacitance such that the wireless power receiver circuit and the receiver coil are configured to resonate at a resonant frequency that is substantially equal to the first frequency, the receiver coil having a ferrite-less core being resistant to degradation of a resonant condition of the receiver coil and the wireless power receiver circuit from permanent magnets in the mobile device.
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Abstract
A wireless powering and charging system is described. Such a system comprises a radio frequency transmitter (typically a home-appliance sized unit on a desk or a shelf) and a receiver (typically a small mobile unit carried by the user). When the user is in range of the transmitter, charging or powering can take place in the mobile unit.
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Citations
19 Claims
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1. A wireless power reception system, comprising:
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a receiver coil disposed about a perimeter of a mobile device; and a wireless power receiver circuit coupled to the receiver coil, the wireless power receiver circuit and the receiver coil configured to receive power via a wireless field at a first frequency, the received wireless power sufficient to charge or power a load, the wireless power receiver circuit and the receiver coil having an inductance and a capacitance such that the wireless power receiver circuit and the receiver coil are configured to resonate at a resonant frequency that is substantially equal to the first frequency, the receiver coil having a ferrite-less core being resistant to degradation of a resonant condition of the receiver coil and the wireless power receiver circuit from permanent magnets in the mobile device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16)
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10. A method of receiving wireless power, comprising:
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receiving power with a receiver coil disposed about a perimeter of an electronic device and a wireless power receive circuit via a wireless field at a first frequency, the receiver coil having a ferrite-less core that is resistant to degradation of a resonant condition of the receiver coil and the wireless power receive circuit from permanent magnets in the mobile device, and the received wireless power sufficient to charge or power a load; and adjusting a component of the wireless power receive circuit to adjust at least one of an inductance and a capacitance of the wireless power receive circuit and the receiver coil such that the wireless power receive circuit and the receiver coil are configured to resonate at a resonant frequency that is substantially equal to the first frequency. - View Dependent Claims (11, 17, 18)
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12. An apparatus for receiving power via a wireless field, comprising:
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means for receiving power with via the wireless field at a first frequency, the means for receiving power comprising a ferrite-less core and configured to be disposed about a perimeter of an electronic device and resistant to degradation of a resonant condition of the means for receiving power from permanent magnets in the electronic device, and the received power sufficient to charge or power a load; and means for adjusting a component of the means for receiving power to adjust at least one of an inductance and capacitance of the means for receiving power such that the means for receiving power is configured to resonate at a resonant frequency that is substantially equal to the first frequency. - View Dependent Claims (13, 14, 15, 19)
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Specification