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    • 1. 发明授权
    • Shape of wireless power transmission coil and coil configuration method
    • US11190040B2
    • 2021-11-30
    • US16312902
    • 2017-05-24
    • LG INNOTEK CO., LTD.
    • Su Ho Bae
    • H02J7/00H02J7/02H02J50/12H02J50/80H01F27/28H01F38/14
    • An electromagnetic resonance-type wireless power transmitter according to one embodiment of the present invention may comprise: a power conversion unit including a converter capable of converting a voltage received from a power supply unit into a particular voltage; a power transmission unit including a wireless power transmission coil for receiving the particular voltage from the power conversion unit and wirelessly transmitting power, using a particular resonance frequency; a communication unit capable of performing data communication with a wireless power receiver; and a control unit for controlling the power conversion unit, the power transmission unit, and the communication unit, wherein the wireless power transmission coil may comprise an outer coil part having a first loop shape, and an inner coil part disposed within the first loop shape and having a second loop shape, the direction of a current flowing through the outer coil part may be opposite to that of a current flowing through the inner coil part adjacent to the outer coil part, and the direction of a magnetic field generated by the outer coil part may be identical to that of a magnetic field generated by the inner coil part in a first area between the outer coil part and the inner coil part adjacent to the outer coil part.