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Wireless power receiving device and power control method thereof

A technology of wireless power and electric power, applied in circuit devices, battery circuit devices, charge equalization circuits, etc., can solve the problem of short power transmission distance and achieve the effect of preventing waste

Active Publication Date: 2015-07-15
LG INNOTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the commercialization of electromagnetic induction technology has rapidly advanced around small devices, its power transmission distance is short

Method used

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  • Wireless power receiving device and power control method thereof
  • Wireless power receiving device and power control method thereof
  • Wireless power receiving device and power control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0039] According to one embodiment, the current sensing unit 140 may include a current transformer (CT).

[0040] According to one embodiment, the distance between the wireless power transmitter 200 and the wireless power receiver 300 may be obtained by using the intensity of the current applied to the AC power generating unit 160 .

[0041] According to one embodiment, the coupling coefficient between the wireless power transmitter 200 and the wireless power receiver 300 may be obtained by using the strength of the current applied to the AC power generating unit 160 .

[0042] The current sensing unit 140 may transmit a signal corresponding to the intensity of the sensed current to the control unit 180 .

[0043] Although the current sensing unit 140 is in figure 1 is depicted as an element separate from the control unit 180 , but the current sensing unit 140 may be included in the control unit 180 .

[0044] The oscillator 150 may generate an AC signal having a predetermin...

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PUM

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Abstract

Disclosed is a wireless power receiver and a power control method thereof. The wireless power receiver includes a reception unit to receive power from the wireless power transmitter by using a resonance scheme; a load management unit to control an impedance of the load according to a state of the load; and a rectifying unit disposed between the reception unit and the load management unit in order to rectify the received power, wherein the power transmitted from the wireless power transmitter is controlled by the controlled impedance.

Description

technical field [0001] Embodiments relate to wireless power transfer technology. More particularly, the embodiments relate to a wireless power receiving device capable of maximizing power transmission efficiency and a power control method thereof. Background technique [0002] Wireless power transmission or wireless energy transfer refers to a technology of wirelessly transferring power to a desired device. In the 1800s, electric motors or transformers employing the principle of electromagnetic induction were widely used, and then a method for transmitting electric energy by radiating electromagnetic waves such as radio waves or lasers was proposed. Actually, an electric toothbrush or an electric shaver frequently used in daily life is charged based on the principle of electromagnetic induction. Electromagnetic induction refers to the phenomenon that when the magnetic field around a conductor changes, a voltage is induced so that a current flows. Although the commercializ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00
CPCH02J5/005H02J7/025H02J50/12H02J7/00712H02J50/40H02J2207/20H02J50/005H02J7/0019H02J7/0045H02J7/00
Inventor 裴守镐
Owner LG INNOTEK CO LTD
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