WIRELESS POWER TRANSMISSION DEVICE
First Claim
1. A wireless power transmission device, comprising:
- a power transmission device; and
a power reception device, to which power is transmitted from the power transmission device, whereinthe power reception device includesa power reception coil which receives the power,a first resonance circuit connected to the power reception coil,a load circuit to which a first signal having a first power value is supplied from the first resonance circuit,a first power measuring unit, which measures the first power value, anda first transceiver which transmits the first power value to the power transmission device, andthe power transmission device includesa power source, which generates a second signal having a second power value,a second resonance circuit including a plurality of inductors and capacitors to which the second signal is input,a power transmission coil connected to the second resonance circuit, which transmits the power,a second power measuring unit which measures the second power value,a second transceiver which receives the first power value from the first transceiver, anda first control circuit which calculates power transmission efficiency using the first power value and the second power value and adjusts at least one of inductance values of the inductors and/or at least one of capacitance values of the capacitors based on the power transmission efficiency.
1 Assignment
0 Petitions
Accused Products
Abstract
In one embodiment, a power reception device includes a load circuit, to which a first signal having a first power value is supplied from a first resonance circuit connected to a power reception coil, and a first transceiver which transmits the first power value to a power transmission device. The power transmission device includes a second resonance circuit including a plurality of inductors and capacitors to which a second signal having a second power value is input, a power transmission coil connected to the second resonance circuit, a second transceiver which receives the first power value from the first transceiver, and a first control circuit which calculates power transmission efficiency using the first power value and the second power value and adjusts at least one of inductance values of the inductors and/or at least one of capacitance values of the capacitors based on the power transmission efficiency.
-
Citations
9 Claims
-
1. A wireless power transmission device, comprising:
-
a power transmission device; and a power reception device, to which power is transmitted from the power transmission device, wherein the power reception device includes a power reception coil which receives the power, a first resonance circuit connected to the power reception coil, a load circuit to which a first signal having a first power value is supplied from the first resonance circuit, a first power measuring unit, which measures the first power value, and a first transceiver which transmits the first power value to the power transmission device, and the power transmission device includes a power source, which generates a second signal having a second power value, a second resonance circuit including a plurality of inductors and capacitors to which the second signal is input, a power transmission coil connected to the second resonance circuit, which transmits the power, a second power measuring unit which measures the second power value, a second transceiver which receives the first power value from the first transceiver, and a first control circuit which calculates power transmission efficiency using the first power value and the second power value and adjusts at least one of inductance values of the inductors and/or at least one of capacitance values of the capacitors based on the power transmission efficiency. - View Dependent Claims (2, 3)
-
-
4. A wireless power transmission device, comprising:
-
a power transmission device; and a power reception device, to which power is transmitted from the power transmission device, wherein the power reception device includes a power reception coil which receives the power, a first resonance circuit connected to the power reception coil, a load circuit to which a first signal having a first power value is supplied from the first resonance circuit, a first power measuring unit which measures the first power value, and a transmitter which transmits the first power value to the power transmission device, and the power transmission device includes a power source which generates a second signal having a second power value, a second resonance circuit including a plurality of inductors and capacitors to which the second signal is input, a power transmission coil connected to the second resonance circuit, which transmits the power, a second power measuring unit which measures the second power value, a receiver which receives the first power value from the first transceiver, and a first control circuit which calculates power transmission efficiency using the first power value and the second power value and adjusts a frequency of the second signal output from the power source based on the power transmission efficiency. - View Dependent Claims (5, 6, 7)
-
-
8. A power transmission device, which transmits power to a power reception device, comprising:
-
a power source which generates a first signal having a first power value; a first resonance circuit including a plurality of inductors and capacitors to which the first signal is input; a power transmission coil connected to the first resonance circuit which transmits the power; a power measuring unit which measures the first power value; a receiver which receives a second power value of a second signal supplied from a second resonance circuit connected to a power reception coil to a load circuit in the power reception device transmitted from the power reception device; and a control circuit which calculates power transmission efficiency using the first power value and the second power value and adjusts at least one of inductance values of the inductors and/or at least one of capacitance values of the capacitors based on the power transmission efficiency.
-
-
9. A power reception device, to which power is transmitted from a power transmission device, comprising:
-
a power reception coil which receives the power; a resonance circuit including a plurality of inductors and capacitors and connected to the power reception coil; a load circuit to which a first signal having a first power value is supplied from the resonance circuit; a power measuring unit which measures the first power value; a transceiver which transmits the first power value to the power transmission device and receives power transmission efficiency calculated based on a second power value of a second signal generated by a power source for transmitting the power in the power transmission device and the first power value from the power transmission device; and a control circuit which adjusts at least one of inductance values of the inductors and/or at least one of capacitance values of the capacitors included in the resonance circuit based on the power transmission efficiency.
-
Specification