METHOD AND APPARATUS FOR TRANSMITTING WIRELESS POWER

• US 20180006467A1
• Filed: 09/18/2017
• Published: 01/04/2018
• Est. Priority Date: 12/15/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Kyung-Woo, BYUN, Kang-Ho, PARK, Se-Ho
• Granted Patent: US 10,312,696 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus are provided for controlling wireless power in a wireless power network managed by a wireless power transmitter. The control method includes registering a wireless power receiver to a wireless power network corresponding to the wireless power transmitter; applying a charging power for charging the wireless power receiver to a resonator of the wireless power transmitter; detecting a change of magnitude of power applied to the resonator; detecting that a communication unit of the wireless power transmitter fails to receive a communication signal from the wireless power receiver a predetermined time; and in response to detecting the change of the magnitude of power applied to the resonator and that the communication unit fails to receive the communication signal from the wireless power receiver in the predetermined time, removing the wireless power receiver from the wireless power network.

Claims

1. A wireless power transmitter, comprising:

a resonator;

a communication device; and

a processor configured to;

register a wireless power receiver to a wireless power network corresponding to the wireless power transmitter,

control such that a charging power for charging the wireless power receiver is applied to the resonator,

detect a change of magnitude of power applied to the resonator,

detect that the communication unit fails to receive a communication signal from the wireless power receiver in a predetermined time, and

in response to detecting the change of the magnitude of the power applied to the resonator and that the communication unit fails to receive the communication signal from the wireless power receiver in the predetermined time, remove the wireless power receiver from the wireless power network.

2. The wireless power transmitter of claim 1, wherein the processor is further configured to control such that a detecting power for detecting another load change caused by a placement of an object is applied to the resonator, when no wireless power receivers remain registered to the wireless power network, after removing the wireless power receiver from the wireless power network.

3. The wireless power transmitter of claim 1, wherein the processor is further configured to adjust an amount of the charging power applied to the resonator, in response to removing the wireless power receiver from the wireless power network.

4. A control method of a wireless power transmitter, the control method comprising:

registering a wireless power receiver to a wireless power network corresponding to the wireless power transmitter;

applying a charging power for charging the wireless power receiver to a resonator of the wireless power transmitter;

detecting a change of magnitude of power applied to the resonator;

detecting that a communication unit of the wireless power transmitter fails to receive a communication signal from the wireless power receiver a predetermined time; and

in response to detecting the change of the magnitude of power applied to the resonator and that the communication unit fails to receive the communication signal from the wireless power receiver in the predetermined time, removing the wireless power receiver from the wireless power network.

5. The control method of claim 4, further comprising applying, to the resonator, a detecting power for detecting another load change caused by a placement of an object, when no wireless power receivers remain registered to the wireless power network, after removing the wireless power receiver from the wireless power network.

6. The control method of claim 4, further comprising adjusting an amount of the charging power applied to the resonator, in response to removing the wireless power receiver from the wireless power network.