Apparatus and method for wireless power transfer
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United States of America Patent
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Oct 15, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jul 13, 2017
filing date -
Jul 14, 2016
priority date (Note) -
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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.
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