| CPC H02J 50/12 (2016.02) [H01F 27/42 (2013.01); H02J 2310/22 (2020.01)] | 9 Claims |
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1. A wireless power receiver comprising:
a resonance circuit comprising a first coil, a first capacitor, a second coil, a second capacitor, a third coil, and a third capacitor;
a switching circuit comprising a first switch, and a second switch, wherein the first switch and a second switch are a n-type field-effect transistor (FET) and a first source of the first switch is connected to a second source of the second switch;
a rectifier circuit coupled to the resonance circuit and configured to converting alternating current (AC) to direct current (DC) power; and
a driver circuit is configured to:
control the switching circuit to switch on the first switch and the second switch to form a first resonator in which the first coil and the first capacitor are connected in series, wherein a first current is induced in the first resonator based on a first electromagnetic field from an external wireless power transmitter, and a second current is induced in the second coil and the third coil based on a second electromagnetic field generated by the first current, and
control the switching circuit to switch off the first switch and the second switch to form a second resonator in which the first coil, the first capacitor, the second coil, the second capacitor, the third coil, and the third capacitor are connected in series, wherein a third current is induced in the second resonator based on a third electromagnetic field from the external wireless power transmitter.
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