Wireless power transmission device, wireless power transmission control device, and wireless power transmission method
First Claim
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1. A wireless power transmission device, comprising:
- a determiner configured to determine a coupling frequency between a source resonator and a target resonator, based on a reflected wave received from the target resonator that is in response to a transmission signal transmitted from the source resonator to the target resonator,wherein the coupling frequency being an odd mode frequency, andwherein the odd mode frequency is less than a center frequency between the source resonator and the target resonator; and
a controller configured to control a transmission frequency such that power is transmitted from the source resonator to the target resonator at the determined coupling frequency,wherein, the determiner scans a band of frequencies lower than the transmission frequency in response to the distance between the source resonator and the target resonator decreased, and the determiner scans a band of frequencies higher than the transmission frequency in response to the distance between the source resonator and the target resonator increased, for measuring the reflected wave.
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Abstract
A wireless power transmission device, a wireless power transmission control device, and a wireless power transmission method are provided. A coupling frequency between a source resonator and a target resonator is determined. A transmission frequency is controlled such that power is transmitted from the source resonator to the target resonator at the coupling frequency. Therefore, it is possible to maintain a high power transmission efficiency without using an additional matching circuit even when a distance between the source resonator and the target resonator is changed.
9 Citations
15 Claims
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1. A wireless power transmission device, comprising:
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a determiner configured to determine a coupling frequency between a source resonator and a target resonator, based on a reflected wave received from the target resonator that is in response to a transmission signal transmitted from the source resonator to the target resonator, wherein the coupling frequency being an odd mode frequency, and wherein the odd mode frequency is less than a center frequency between the source resonator and the target resonator; and a controller configured to control a transmission frequency such that power is transmitted from the source resonator to the target resonator at the determined coupling frequency, wherein, the determiner scans a band of frequencies lower than the transmission frequency in response to the distance between the source resonator and the target resonator decreased, and the determiner scans a band of frequencies higher than the transmission frequency in response to the distance between the source resonator and the target resonator increased, for measuring the reflected wave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless power transmission method by a processor, comprising:
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scanning a band of frequencies lower than the transmission frequency in response to the distance between the source resonator and the target resonator decreased, and a band of frequencies higher than the transmission frequency in response to the distance between the source resonator and the target resonator increased, for measuring the reflected wave; determining a coupling frequency between a source resonator and a target resonator, the coupling frequency being an odd mode frequency, wherein the odd mode frequency is less than a center frequency between the source resonator and the target resonator; and controlling a transmission frequency such that power is transmitted from the source resonator to the target resonator at the determined coupling frequency.
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13. A wireless power transmission control device, comprising:
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a determiner configured to determine a coupling frequency between a source resonator and a target resonator, the coupling frequency being an odd mode frequency, wherein the odd mode frequency is less than a center frequency between the source resonator and the target resonator; and an output unit configured to transmit the coupling frequency to a wireless power transmission device, wherein, the determiner scans a band of frequencies lower than the transmission frequency in response to the distance between the source resonator and the target resonator decreased, and the determiner scans a band of frequencies higher than the transmission frequency in response to the distance between the source resonator and the target resonator increased, for measuring the reflected wave. - View Dependent Claims (14, 15)
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Specification