Apparatus and method for wireless power transfer
First Claim
1. A device for wirelessly transferring power to an external device, the device comprising:
- a resonant circuit comprising an adaptive circuit comprising at least one variable capacitor and a first inductor inductively coupled to the external device and configured to transfer the power to the external device using inductive coupling; and
a first direct current (DC) power supply configured to apply a controllable variable output DC voltage to the adaptive circuit based on a control signal,wherein a capacitance of the at least one variable capacitor is adjusted based on the controllable variable output DC voltage applied to the adaptive circuit.
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Accused Products
Abstract
A device that wirelessly transfers power to an external device is provided. The device for wirelessly transferring power to an external device includes a resonant circuit including an adaptive circuit including at least one variable capacitor and a first inductor inductively coupled to the external device and configured to transfer the power to the external device using inductive coupling, and a first direct current (DC) power supply configured to apply a DC voltage to the adaptive circuit based on a control signal, wherein capacitance of the at least one variable capacitor is adjusted based on the DC voltage applied to the adaptive circuit.
10 Citations
18 Claims
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1. A device for wirelessly transferring power to an external device, the device comprising:
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a resonant circuit comprising an adaptive circuit comprising at least one variable capacitor and a first inductor inductively coupled to the external device and configured to transfer the power to the external device using inductive coupling; and a first direct current (DC) power supply configured to apply a controllable variable output DC voltage to the adaptive circuit based on a control signal, wherein a capacitance of the at least one variable capacitor is adjusted based on the controllable variable output DC voltage applied to the adaptive circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless power transfer method in which a wireless power transfer device comprising a resonant circuit comprising an adaptive circuit comprising at least one variable capacitor and a first inductor, and a first DC power supply wirelessly transfers power to an external device, the method comprising:
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applying a generated control signal to the first DC power supply; applying a controllable variable output DC voltage output from the first DC power supply to the adaptive circuit based on the generated control signal; adjusting a capacitance of the at least one variable capacitor based on the controllable variable output DC voltage; and transferring wireless power through the first inductor based on the adjusted capacitance. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A computer program product comprising a non-transitory computer readable recording medium,
wherein the non-transitory computer readable recording medium comprises a computer program command for performing a power transfer method performed by a wireless power transfer device comprising a resonant circuit comprising an adaptive circuit comprising at least one variable capacitor and a first inductor, and a first DC power supply and wirelessly transferring power to an external device, and wherein the power transfer method comprises: -
applying a generated control signal to the first DC power supply; applying a controllable variable output DC voltage output from the first DC power supply to the adaptive circuit based on the generated control signal; adjusting a capacitance of the at least one variable capacitor based on the controllable variable output DC voltage; and transferring wireless power through the first inductor based on the adjusted capacitance.
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Specification