WIRELESS POWER SUPPLY APPARATUS
First Claim
1. A wireless power supply apparatus, comprising:
- a power supply unit configured to supply electric power;
a power transmitting resonant coil configured to be able to resonate in a magnetic field with a power receiving resonant coil at a first resonant frequency that generates a magnetic field resonance, and transmit the electric power supplied from the power supply unit as a magnetic field energy by using the magnetic field resonance;
a power receiving resonant coil configured to be able to resonate in a magnetic field with the power transmitting resonant coil at the first resonant frequency, and receive the magnetic field energy transmitted from the power transmitting resonant coil by using the magnetic field resonance;
a power receiving unit configured to output the magnetic field energy received by the power receiving resonant coil as electric power;
a distance detector configured to detect a distance between the power transmitting resonant coil and the power receiving resonant coil;
a power transmitting frequency controller configured to change the first resonant frequency of the power transmitting resonant coil from the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector, the power transmitting frequency controller being provided for the power transmitting resonant coil; and
a power receiving frequency controller configured to change the first resonant frequency of the power receiving resonant coil from the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector, the power receiving frequency controller being provided for the power receiving resonant coil.
1 Assignment
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Accused Products
Abstract
A wireless power supply includes: a power transmitting coil resonant at a first resonant frequency that generates a magnetic field resonance, a power receiving coil resonant at the first resonant frequency, a power receiving unit that outputs energy received by the power receiving resonant coil; a distance detector that detects a distance between the power transmitting resonant coil and the power receiving resonant coil; a power transmitting frequency controller that changes the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector; and a power receiving frequency controller that changes the first resonant frequency of the power receiving resonant coil from the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector.
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Citations
7 Claims
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1. A wireless power supply apparatus, comprising:
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a power supply unit configured to supply electric power; a power transmitting resonant coil configured to be able to resonate in a magnetic field with a power receiving resonant coil at a first resonant frequency that generates a magnetic field resonance, and transmit the electric power supplied from the power supply unit as a magnetic field energy by using the magnetic field resonance; a power receiving resonant coil configured to be able to resonate in a magnetic field with the power transmitting resonant coil at the first resonant frequency, and receive the magnetic field energy transmitted from the power transmitting resonant coil by using the magnetic field resonance; a power receiving unit configured to output the magnetic field energy received by the power receiving resonant coil as electric power; a distance detector configured to detect a distance between the power transmitting resonant coil and the power receiving resonant coil; a power transmitting frequency controller configured to change the first resonant frequency of the power transmitting resonant coil from the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector, the power transmitting frequency controller being provided for the power transmitting resonant coil; and a power receiving frequency controller configured to change the first resonant frequency of the power receiving resonant coil from the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector, the power receiving frequency controller being provided for the power receiving resonant coil. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless power supply apparatus, comprising:
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a power supply unit configured to supply electric power with a first resonant frequency; a power transmitting coil configured to transmit the electric power by converting the electric power into magnetic field energy; a power transmitting resonant circuit configured to be able to change a power transmitting resonance characteristic, the power transmitting resonant circuit including the power transmitting coil; a power transmitting frequency controller configured to change the power transmitting resonance characteristic of the power transmitting resonant circuit; a power receiving coil configured to receive the magnetic field energy and convert the magnetic field energy into electric power; a power receiving resonant circuit configured to be able to change a power receiving resonance characteristic, the power receiving resonant circuit including the power receiving coil; a power receiving frequency controller configured to change the power receiving resonance characteristic of the power receiving resonant circuit; and a detector configured to detect a relative relationship between the power transmitting coil and the power receiving coil, wherein the power transmitting resonance characteristic and the power receiving resonance characteristic have a plurality of resonance characteristics which include a first resonating characteristic that resonates at the first resonant frequency and a second resonating characteristic that resonates at a second resonant frequency different from the first resonant frequency, and the power transmitting frequency controller and the power receiving frequency controller switch the resonance characteristics of the power transmitting resonant circuit and the power receiving resonant circuit between the first resonating characteristic and the second resonating characteristic.
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Specification