Electric device, wireless power transmission device, and power transmission method thereof
First Claim
1. A wireless power transmission device, comprising:
- a power coil to which a first high frequency current is applied;
a transmission coil in which a second high frequency current corresponding to the first high frequency current is induced by magnetic induction; and
a resonant frequency regulator configured to adjust a resonant frequency of the transmission coil to equal a resonant frequency of an external target device,wherein the transmission coil is configured to generate a non-radiative electromagnetic wave to transfer power to the external target device when the resonant frequency of the transmission coil is equal to the resonant frequency of the external target device.
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Accused Products
Abstract
Provided is a wireless power transmission device. The wireless power transmission device includes a power coil in which a high frequency current is applied, a transmission coil in which the high frequency current is induced by magnetic induction, the transmission coil configured to generate an non-radiative electromagnetic wave when the transmission coil has the same resonant frequency as an at least one external target device, and a resonant frequency regulator configured to regulate the resonant frequency of the transmission coil. The wireless power transmission device can transmit the power when it has the same resonant frequency as the target device. Therefore, the overheating due to an eddy current may not occur, and the design may be easily varied.
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Citations
20 Claims
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1. A wireless power transmission device, comprising:
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a power coil to which a first high frequency current is applied; a transmission coil in which a second high frequency current corresponding to the first high frequency current is induced by magnetic induction; and a resonant frequency regulator configured to adjust a resonant frequency of the transmission coil to equal a resonant frequency of an external target device, wherein the transmission coil is configured to generate a non-radiative electromagnetic wave to transfer power to the external target device when the resonant frequency of the transmission coil is equal to the resonant frequency of the external target device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electric device for receiving power from a wireless power transmission device, comprising:
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a receiving coil inserted into a PC board, the receiving coil being configured to receive the power through a non-radiative electromagnetic wave generated from the wireless power transmission device when the receiving coil has the same resonant frequency as does the wireless power transmission device, the receiving coil having a spiral structure; and a loading coil configured to receive the power from the receiving coil by magnetic induction to supply the power to a target device. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A wireless power transmission system comprising:
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an electric device including a receiving coil configured to receive power through a non-radiative electromagnetic wave and having a resonant frequency, and a loading coil configured to receive the power from the receiving coil by magnetic induction to supply the power to a target device; and a wireless power transmission device including a power coil to which a first high frequency current is applied, a transmission coil in which a second high frequency current corresponding to the first high frequency current is induced by magnetic induction, and a resonant frequency regulator configured to adjust a resonant frequency of the transmission coil to equal the resonant frequency of the receiving coil, wherein the transmission coil is configured to generate a non-radiative electromagnetic wave to transfer the power to the electric device when the resonant frequency of the transmission coil is equal to the resonant frequency of the receiving coil. - View Dependent Claims (15, 16, 17)
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18. A wireless power transmission device, comprising:
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a power coil in which a first high frequency current is applied; a transmission coil having a plurality of coils and in which a second high frequency current is induced by magnetic induction; and a resonant frequency regulator configured to adjust a resonant frequency of the transmission coil to equal a resonant frequency of an external target device, the resonant frequency regulator adjusting a distance between the plurality of coils of the transmission coil to adjust the resonant frequency of the transmission coil to be equal to the resonant frequency of the external target device, wherein the transmission coil is configured to generate a non-radiative electromagnetic wave to transfer power to the external target device when the resonant frequency of the transmission coil is equal to the resonant frequency of the external target device. - View Dependent Claims (19, 20)
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Specification