Power transmission device
First Claim
1. A power transmission device, comprising:
- a power supply circuit that generates an alternating voltage;
a power transmission coil that receives an alternating voltage generated by the power supply circuit to thereby generate a magnetic field;
a power transmission resonator that comprises a resonant coil and a resonant capacitor and through which electromagnetic induction causes an electric current to flow when a magnetic field is generated by the power transmission coil to enter a resonance state; and
a control circuit that controls the position or the orientation of the power transmission coil with respect to the power transmission resonator in the direction in which a standing wave ratio in a transmission line from the power supply circuit to the power transmission coil decreases, whereinthe power supply circuit amplifies an alternating voltage by a gain according to the position or the orientation of the power transmission coil controlled by the control circuit to output an amplified alternating voltage.
1 Assignment
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Accused Products
Abstract
A power transmission device includes: a power supply circuit that generates an alternating voltage; a power transmission coil that receives an alternating voltage generated by the power supply circuit to thereby generate a magnetic field; a power transmission resonator that includes: a resonant coil; and a resonant capacitor and through which electromagnetic induction causes an electric current to flow when a magnetic field is generated by the power transmission coil to enter a resonance state; and a control circuit that controls the position or the orientation of the power transmission coil with respect to the power transmission resonator in the direction in which a standing wave ratio in a transmission line from the power supply circuit to the power transmission coil decreases.
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Citations
6 Claims
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1. A power transmission device, comprising:
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a power supply circuit that generates an alternating voltage; a power transmission coil that receives an alternating voltage generated by the power supply circuit to thereby generate a magnetic field; a power transmission resonator that comprises a resonant coil and a resonant capacitor and through which electromagnetic induction causes an electric current to flow when a magnetic field is generated by the power transmission coil to enter a resonance state; and a control circuit that controls the position or the orientation of the power transmission coil with respect to the power transmission resonator in the direction in which a standing wave ratio in a transmission line from the power supply circuit to the power transmission coil decreases, wherein the power supply circuit amplifies an alternating voltage by a gain according to the position or the orientation of the power transmission coil controlled by the control circuit to output an amplified alternating voltage. - View Dependent Claims (4)
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2. A power transmission device, comprising:
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a power supply circuit that generates an alternating voltage; a power transmission coil that receives an alternating voltage generated by the power supply circuit to thereby generate a magnetic field; a power transmission resonator that comprises a resonant coil and a resonant capacitor and through which electromagnetic induction causes an electric current to flow when a magnetic field is generated by the power transmission coil to enter a resonance state; a control circuit that controls the position or the orientation of the power transmission coil with respect to the power transmission resonator in the direction in which a standing wave ratio in a transmission line from the power supply circuit to the power transmission coil decreases; and a first memory that outputs a distance between the power transmission resonator in the power transmission device and a power reception resonator in a power reception device based on the position or the orientation of the power transmission coil controlled by the control circuit, wherein the power supply circuit amplifies an alternating voltage by a gain according to the distance between the power transmission resonator in the power transmission device and the power reception resonator in the power reception device that is output by the first memory to output an amplified alternating voltage. - View Dependent Claims (3, 5, 6)
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Specification