Wireless power transmission system, transmitter, and receiver
First Claim
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1. A wireless power transmission system comprising:
- a receiver; and
a transmitter that wirelessly transmits power to the receiver,wherein the transmitter includes;
a power transmission unit that transmits power; and
a power adjustment unit that adjusts power to be transmitted by the transmitter,wherein the receiver includes;
a power receiving unit that receives the power from the transmitter; and
a power storage unit that stores the received power,wherein the magnitude of the power to be transmitted is adjusted as a function of both a transmission efficiency of the power transmitted to the receiver by the transmitter and a remaining level of energy stored in the power storage unit,wherein the power to be transmitted increases as the transmission efficiency increases, andwherein the power to be transmitted increases as the remaining level of energy stored in the power storage unit decreases.
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Abstract
A wireless power transmission system includes a receiver and a transmitter. The transmitter includes: a power transmission unit that transmits power; a power adjustment unit that adjusts power to be transmitted; and a communication unit. The receiver includes: a power receiving unit that receives power; a power detection unit that detects the received power; a power storage unit that stores the received power; and a communication unit. The power to be transmitted is adjusted on the basis of power transmission efficiency and the remaining energy storage level. The power transmission efficiency is the ratio between the transmitted power and the received power.
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Citations
18 Claims
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1. A wireless power transmission system comprising:
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a receiver; and a transmitter that wirelessly transmits power to the receiver, wherein the transmitter includes; a power transmission unit that transmits power; and a power adjustment unit that adjusts power to be transmitted by the transmitter, wherein the receiver includes; a power receiving unit that receives the power from the transmitter; and a power storage unit that stores the received power, wherein the magnitude of the power to be transmitted is adjusted as a function of both a transmission efficiency of the power transmitted to the receiver by the transmitter and a remaining level of energy stored in the power storage unit, wherein the power to be transmitted increases as the transmission efficiency increases, and wherein the power to be transmitted increases as the remaining level of energy stored in the power storage unit decreases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A transmitter comprising:
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a power transmission unit that wirelessly transmits power to a receiver; a power adjustment unit that adjusts power to be transmitted; a communication unit that wirelessly communicates with the receiver; and a control unit, wherein information about power received by the receiver and information about an amount of power stored in the receiver are acquired from the receiver, wherein a transmission efficiency of the transmitted power is calculated, and wherein the magnitude of the power to be transmitted is adjusted as a function of both the transmission efficiency and a remaining level of energy stored in the receiver, wherein the power to be transmitted increases as the transmission efficiency increases, and wherein the power to be transmitted increases as the remaining level of energy stored in the receiver decreases. - View Dependent Claims (13, 14, 15)
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16. A receiver comprising:
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a power receiving unit that wirelessly receives power from a transmitter; a power detection unit that detects the received power; a power storage unit that stores the received power; a communication unit that wirelessly communicates with the transmitter; and a control unit, wherein, upon receipt of an instruction to perform power reception control from the transmitter, the receiver performs the power reception control, and wherein the receiver adjusts the amount of power to be received as a function of both a transmission efficiency of the power and a remaining level of energy stored in the power storage unit, the transmission efficiency being a ratio between the power transmitted by the transmitter and the power received by the power receiving unit, wherein the power to be transmitted increases as the transmission efficiency increases, and wherein the power to be transmitted increases as the remaining level of energy stored in the power storage unit decreases. - View Dependent Claims (17, 18)
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Specification