WIRELESS POWER TRANSMISSION DEVICE AND METHOD FOR CONTROLLING POWER SUPPLY FOR WIRELESS POWER TRANSMISSION DEVICE
First Claim
1. a wireless power transmission apparatus configured to supply power from a power-supplying module connected to a power source to a power-receiving module by means of resonance phenomenon, wherein:
- the power-supplying module includesa phase detector configured to detect the phase of an input impedance, anda control device configured to control power to be supplied to the power-supplying module;
wherein the power-supplying module and the power-receiving module are each set so that a transmission characteristic with respect to a power-source frequency of the power supplied to the power-supplying module has a double-hump characteristic such that a peak occurs in a power-source frequency band lower than a resonance frequency of the power-supplying module and the power-receiving module, and in a power-source frequency band higher than the resonance frequency; and
wherein the control device determines whether to supply power to the power-supplying module, based on a difference between phases of the input impedances in a standby state and in a power-supplying state, the standby state being a state in which power is not supplied from the power-supplying module to the power-receiving module, the power-supplying state being a state in which power is supplied from the power-supplying module to the power-receiving module, and the phases being detected by the phase detector.
1 Assignment
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Accused Products
Abstract
A wireless power transmission apparatus 1 includes a power-supplying module 2, a power-receiving module 3, a phase detector 4, and a control device 5, and is set so that its transmission characteristic with respect to the power-source frequency has a double-hump characteristic. The control device 5 determines whether to supply power to the power-supplying module 2, based on variation in the phase of the input impedance Zin in the power-supplying state and that in the standby state, which is detected by a phase detector 4.
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Citations
4 Claims
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1. a wireless power transmission apparatus configured to supply power from a power-supplying module connected to a power source to a power-receiving module by means of resonance phenomenon, wherein:
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the power-supplying module includes a phase detector configured to detect the phase of an input impedance, and a control device configured to control power to be supplied to the power-supplying module; wherein the power-supplying module and the power-receiving module are each set so that a transmission characteristic with respect to a power-source frequency of the power supplied to the power-supplying module has a double-hump characteristic such that a peak occurs in a power-source frequency band lower than a resonance frequency of the power-supplying module and the power-receiving module, and in a power-source frequency band higher than the resonance frequency; and wherein the control device determines whether to supply power to the power-supplying module, based on a difference between phases of the input impedances in a standby state and in a power-supplying state, the standby state being a state in which power is not supplied from the power-supplying module to the power-receiving module, the power-supplying state being a state in which power is supplied from the power-supplying module to the power-receiving module, and the phases being detected by the phase detector. - View Dependent Claims (2, 3)
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4. A supply power control method of a wireless power transmission apparatus configured to supply power from a power-supplying module connected to a power source to a power-receiving module by means of resonance phenomenon, wherein
the power-supplying module includes a phase detector configured to detect the phase of an input impedance, and a control device configured to control power to be supplied to the power-supplying module; -
wherein the power-supplying module and the power-receiving module are each set so that a transmission characteristic with respect to a power-source frequency of the power supplied to the power-supplying module has a double-hump characteristic such that a peak occurs in a drive frequency band lower than a resonance frequency of the power-supplying module and the power-receiving module, and in a drive frequency band higher than the resonance frequency, the method comprising the step of the control device determining whether to supply power to the power-supplying module, based on a difference between phases of the input impedances in a standby state and in a power-supplying state, the standby state being a state in which power is not supplied from the power-supplying module to the power-receiving module, the power-supplying state being a state in which power is supplied from the power-supplying module to the power-receiving module, and the phases being detected by the phase detector.
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Specification