Dual-mode multi-coil wireless power transfer system
AssigneeKorea Advanced Institute of Science and Technology
InventorsSeungyong AHN, Semin CHOI, Sungryul HUH, Haerim KIM, Seongho WOO
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Abstract
A dual-mode multi-coil wireless power transfer system includes a control unit and a transmitter unit. The transmitter unit may wirelessly transmit electric power to an external receiver coil. The transmitter unit include a plurality of transmitter modules. Each of the plurality of transmitter modules may operate in at least one of a power transfer mode and a leakage magnetic field shield mode. The control unit controls each of the plurality of transmitter modules to operate in at least one of the power transfer mode and the leakage magnetic field shield mode or to be turned off.
Claims20
A dual-mode multi-coil wireless power transfer system, comprising:
- a transmitter unit configured to wirelessly transmit electric power to an external receiver coil and comprising a plurality of transmitter modules, each of the plurality of transmitter modules configured to operate in at least one of a power transfer mode and a leakage magnetic field shield mode;
- and
- a control unit configured to control each of the plurality of transmitter modules to operate in at least one of the power transfer mode and the leakage magnetic field shield mode or to be turned off,
- wherein when a first transmitter module of the plurality of transmitter modules operates in the power transfer mode and a second transmitter module of the plurality of transmitter modules operates in the leakage magnetic field shield mode, the second transmitter module uses an electromotive force induced by a leakage magnetic field generated by the first transmitter module to generate a magnetic field offsetting the leakage magnetic field.
A dual-mode multi-coil wireless power transfer system, comprising:
- a transmitter unit configured to wirelessly transmit electric power to an external receiver coil and comprising a plurality of transmitter modules, each of the plurality of transmitter modules comprising a transmitter coil and a variable capacitor;
- and
- a control unit configured to adjust a capacitance value, wherein each of the plurality of transmitter modules is operated in at least one of a power transfer mode and a leakage magnetic field shield mode or turned off, and wherein the power transfer mode and the leakage magnetic field shield mode are determined based on the capacitance value of the variable capacitor,
- wherein when a first transmitter module of the plurality of transmitter modules operates in the power transfer mode and a second transmitter module of the plurality of transmitter modules operates in the leakage magnetic field shield mode, the second transmitter module uses an electromotive force induced by a leakage magnetic field generated by the first transmitter module to generate a magnetic field offsetting the leakage magnetic field.
Dependencies are inferred from the claim text.