Wireless power transmission apparatus and wireless power transfer system
First Claim
1. A wireless power transmission method, comprising:
- transmitting to each of a plurality of wireless power reception apparatuses, using a power transmission antenna, each of a plurality of high-frequency power corresponding to a first frequency and each of a plurality of high-frequency power corresponding to a second frequency;
obtaining from each of the plurality of the wireless power reception apparatuses, using a plurality of receiver circuits, i) a required voltage value that corresponds to each of the plurality of the wireless power reception apparatuses, ii) a first power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses and that corresponds to the first frequency, and iii) a second power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses and that corresponds to the second frequency; and
summing, using a control circuit, first errors to obtain a first sum total, each of the first errors occurring between i) the required voltage value that corresponds to each of the plurality of the receiver circuits and ii) the first power reception voltage value that corresponds to each of the plurality of the receiver circuits,wherein, in the summing by the control circuit, the control circuit sums second errors to obtain a second sum total, each of the second errors occurring between i) the required voltage value that corresponds to each of the plurality of the receiver circuits and ii) the second power reception voltage value that corresponds to each of the plurality of the receiver circuits,wherein, in the transmitting to each of the plurality of wireless power reception apparatuses, the control circuit controls the power transmission antenna to transmit, to each of the plurality of the wireless power reception apparatuses, each of a plurality of high-frequency power corresponding to a third frequency that is close to a smaller one of the first sum total and the second sum total, to converge each of third errors occurring between i) the required voltage value and ii) a third power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses and that corresponds to the third frequency, to be within a predetermined criterion error.
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Abstract
A wireless power transmission apparatus according to the present disclosure includes a power transmission antenna, receiver circuits, and a control circuit. The power transmission antenna transmits high-frequency power at each of frequencies to wireless power reception apparatuses. Each of the receiver circuits obtains, from a corresponding one of the wireless power reception apparatuses, the value of a required voltage of the wireless power reception apparatus and the value of a power reception voltage received by the wireless power reception apparatus from the wireless power transmission apparatus. The control circuit obtains the required voltage value and the power reception voltage value from each of the receiver circuits, and controls the frequency of the high-frequency power. The control circuit changes the frequency of the high-frequency power so that the sum total of errors between the required voltage and the power reception voltage is minimized.
13 Citations
4 Claims
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1. A wireless power transmission method, comprising:
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transmitting to each of a plurality of wireless power reception apparatuses, using a power transmission antenna, each of a plurality of high-frequency power corresponding to a first frequency and each of a plurality of high-frequency power corresponding to a second frequency; obtaining from each of the plurality of the wireless power reception apparatuses, using a plurality of receiver circuits, i) a required voltage value that corresponds to each of the plurality of the wireless power reception apparatuses, ii) a first power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses and that corresponds to the first frequency, and iii) a second power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses and that corresponds to the second frequency; and summing, using a control circuit, first errors to obtain a first sum total, each of the first errors occurring between i) the required voltage value that corresponds to each of the plurality of the receiver circuits and ii) the first power reception voltage value that corresponds to each of the plurality of the receiver circuits, wherein, in the summing by the control circuit, the control circuit sums second errors to obtain a second sum total, each of the second errors occurring between i) the required voltage value that corresponds to each of the plurality of the receiver circuits and ii) the second power reception voltage value that corresponds to each of the plurality of the receiver circuits, wherein, in the transmitting to each of the plurality of wireless power reception apparatuses, the control circuit controls the power transmission antenna to transmit, to each of the plurality of the wireless power reception apparatuses, each of a plurality of high-frequency power corresponding to a third frequency that is close to a smaller one of the first sum total and the second sum total, to converge each of third errors occurring between i) the required voltage value and ii) a third power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses and that corresponds to the third frequency, to be within a predetermined criterion error. - View Dependent Claims (2, 3, 4)
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Specification