Wireless power transmitter and method of transmitting power thereof
AssigneesLG Innotek Co., Ltd., Korea Electro Technology Research Institute
InventorsKi Min Lee, Kwan Ho Kim, Jin Wook Kim, Young Jin Park, Hyeon Chang Son, Won Tae Lee
Life of this patent
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Abstract
Disclosed are a wireless power transmitter and a method of transmitting power thereof. The wireless power transmitter to wirelessly transmit power to a wireless power receiver includes a transmission coil to receive power from a power supply apparatus, and a transmission resonance unit to transmit the power received therein from the transmission coil to the wireless power receiver using resonance. The transmission resonance unit includes an inner loop, and an outer loop connected to the inner loop while surrounding the inner loop.
Claims16
A wireless power transmitter to wirelessly transmit power to a wireless power receiver, the wireless power transmitter comprising:
- a transmission resonance unit to transmit the power to the wireless power receiver using resonance,
- wherein the transmission resonance unit comprises a plurality of resonant coils,
- wherein the plurality of resonant coils comprises:
- an inner loop and
- an outer loop connected to the inner loop while surrounding the inner loop;
- a switch unit configured to select at least one of the plurality of resonant coils corresponding to a region in which the wireless power receiver is detected;
- and
- an inductor and a capacitor configured to constantly maintain a resonance frequency of the selected resonant coil for power transmission to the wireless power receiver.
A method of transmitting power of a wireless power transmitter that wirelessly transmits power to a wireless power receiver, the method comprising:
- detecting an approaching state of the wireless power receiver;
- selecting at least one of a plurality of resonant coil corresponding to a region, in which the wireless power receiver is detected, according to a detection result;
- determining a change state of a resonance frequency of the selected resonant coil according to the selection of the resonant coil corresponding to the region in which the wireless power receiver is detected;
- and
- matching the resonance frequency of the selected resonant coil with a resonance frequency of a resonant coil of the wireless power receiver, if the resonance frequency of the selected resonant coil is changed;
- and
- transmitting the power to the wireless power receiver using resonance through the matched resonance frequency by the resonant coil corresponding to the region in which the wireless power receiver is detected.
Dependencies are inferred from the claim text.