Wireless power transmission system and driving method therefor
AssigneeLG Innotek Co., Ltd.
InventorJae Hee Park
Life of this patent
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Abstract
A transfer device comprising: a transfer coil; a power converter for providing transmission power to the transfer coil; and a controller for receiving, from a reception device, allowable reception power information and a control error value so as to control the power converter, wherein the controller determines new transmission power on the basis of the control error value and determines whether to output the new transmission power on the basis of the allowable reception power.
Claims25
A method of wirelessly transferring power from a transmitter to a receiver, the method comprising:
- transferring a signal for detecting the receiver;
- receiving an identification signal from the receiver;
- transferring first power to the receiver;
- receiving a power increasing request signal from the receiver;
- determining second transfer coil current based on first transfer coil current of the transmitter and the power increasing request signal;
- determining second power based on the second transfer coil current;
- and
- comparing the second power, receivable power of the receiver and a power threshold with each other to determine whether the second power is transferred.
A method of, at a receiver, wirelessly receiving power from a transmitter, the method comprising:
- transferring a response signal to a first ping signal from the transmitter;
- transferring identification information to the transmitter;
- receiving first power from the transmitter;
- transferring a power increasing request signal to the transmitter;
- determining whether power is received from the transmitter;
- and
- transferring a response signal to a second ping signal from the transmitter when wireless power reception ends.
A transmitter comprising:
- a transfer coil configured to wirelessly transfer power;
- a power converter configured to output power to the transfer coil;
- and
- a controller configured to control the power converter in order to control the amount of power output to the transfer coil;
- wherein the controller determines new power based on a power increasing request signal from a receiver and determines whether the new power is generated based on the new power, receivable power from the receiver and a power threshold.
A receiver comprising:
- a reception coil configured to receive first power from a transmitter;
- and
- a controller configured to communicate with the transmitter,
- wherein the controller:
- transfers a power increasing request signal based on a difference between first power and desired power, and
- receives second power or a receiver ping signal based on the power increasing request signal.
Dependencies are inferred from the claim text.