Wireless charging receiver with variable resonant frequency
First Claim
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1. A wireless receiver, comprising:
- a receiver coil configured to receive energy from a transmitter coil;
a frequency modification component configured to set a resonant frequency associated with the wireless receiver, wherein the frequency modification component comprises;
a first frequency modification element comprising a first switch and a first capacitor coupled in series with the first switch; and
a second frequency modification element comprising a second switch and a second capacitor coupled in series with the second switch; and
a third capacitor coupled in series with the receiver coil, wherein;
a first end of the receiver coil is coupled to the first frequency modification element,a second end of the receiver coil is coupled to a first terminal of the third capacitor,a first end of the second frequency modification element is coupled to a second terminal of the third capacitor,the first frequency modification element and the second frequency modification element are commonly coupled to a first node not directly coupled to the first end or the second end of the receiver coil, andpower supplied to a device to which the wireless receiver is connected is a function of the energy and the resonant frequency.
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Abstract
At least one of a system or a method for wirelessly charging a device is provided. A wireless receiver is configured to communicate with a device to be charged to determine a desired charge scenario indicative of power to be supplied to the device. Based upon the desired charge scenario, a resonant frequency of the wireless receiver is set. The resonant frequency, in combination with energy transferred from a wireless transmitter, is configured to induce a current in the wireless receiver. Power is supplied to the device based upon the current induced in the wireless receiver.
8 Citations
20 Claims
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1. A wireless receiver, comprising:
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a receiver coil configured to receive energy from a transmitter coil; a frequency modification component configured to set a resonant frequency associated with the wireless receiver, wherein the frequency modification component comprises; a first frequency modification element comprising a first switch and a first capacitor coupled in series with the first switch; and a second frequency modification element comprising a second switch and a second capacitor coupled in series with the second switch; and a third capacitor coupled in series with the receiver coil, wherein; a first end of the receiver coil is coupled to the first frequency modification element, a second end of the receiver coil is coupled to a first terminal of the third capacitor, a first end of the second frequency modification element is coupled to a second terminal of the third capacitor, the first frequency modification element and the second frequency modification element are commonly coupled to a first node not directly coupled to the first end or the second end of the receiver coil, and power supplied to a device to which the wireless receiver is connected is a function of the energy and the resonant frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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setting a resonant frequency of a wireless receiver using a frequency modification component comprising; a first frequency modification element comprising a first switch and a first capacitor coupled in series with the first switch; and a second frequency modification element comprising a second switch and a second capacitor coupled in series with the second switch; inducing a current at the wireless receiver based upon an electromagnetic field generated by a wireless transmitter and the resonant frequency, wherein; the current flows through a third capacitor coupled in series with a receiver coil configured to receive energy from a transmitter coil, a first end of the receiver coil is coupled to the first frequency modification element, a second end of the receiver coil is coupled to a first terminal of the third capacitor, a first end of the second frequency modification element is coupled to a second terminal of the third capacitor, and the first frequency modification element and the second frequency modification element are commonly coupled to a first node not directly coupled to the first end or the second end of the receiver coil; and supplying a device, to which the wireless receiver is connected, with a first power responsive to the inducing, wherein the first power is a function of the energy and the resonant frequency. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A wireless receiver, comprising:
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a receiver coil configured to receive energy from a transmitter coil; a communication and control component configured to receive information from a device to which the wireless receiver is connected to determine a desired charge scenario; a frequency modification component configured to set a resonant frequency associated with the wireless receiver based upon the desired charge scenario, wherein the frequency modification component comprises; a first frequency modification element comprising a first switch and a first capacitor coupled in series with the first switch; and a second frequency modification element comprising a second switch and a second capacitor coupled in series with the second switch; and a third capacitor coupled in series with the receiver coil, wherein; a first end of the receiver coil is coupled to the first frequency modification element, a second end of the receiver coil is coupled to a first terminal of the third capacitor, a first end of the second frequency modification element is coupled to a second terminal of the third capacitor, the first frequency modification element and the second frequency modification element are commonly coupled to a first node not directly coupled to the first end or the second end of the receiver coil, and power supplied to the device from the wireless receiver is a function of the energy and the resonant frequency. - View Dependent Claims (20)
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Specification