APPARATUS AND METHOD FOR WIRELESS POWER RECEPTION

• US 20140015331A1
• Filed: 06/26/2013
• Published: 01/16/2014
• Est. Priority Date: 07/10/2012
• Status: Active Grant

• Current Assignee: Industry-University Cooperation Foundation Hanyang University, Samsung Electronics Co. Ltd.
• Original Assignee: Iuc-Hyu, Samsung Electronics Co. Ltd.
• Inventors: KIM, Dong Zo, KWON, Sang Wook, KIM, Ki Young, KIM, Nam Yun, KIM, Seong Joong, ROH, Yong Seong, MOON, Young Jin, PARK, Yun Kwon, SONG, Keum Su, YOO, Chang Sik, YOON, Chang Wook, CHOI, Jin Sung
• Granted Patent: US 9,437,362 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• 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: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

An apparatus and a method for wireless power reception are provided. A wireless power receiver includes a receiving unit configured to wirelessly receive a power. The wireless power receiver further includes a power consuming unit configured to consume the power, until a voltage applied to a load reaches a predetermined value, so that an amount of a power transferred from the receiving unit to the load is less than or equal to an initial accommodation power amount of the load.

Claims

1. A wireless power receiver comprising:

a receiving unit configured to wirelessly receive a power; and

a power consuming unit configured to consume the power, until a voltage applied to a load reaches a predetermined value, so that an amount of a power transferred from the receiving unit to the load is less than or equal to an initial accommodation power amount of the load.

2. The wireless power receiver of claim 1, further comprising:

a rectifier configured to rectify an alternating current (AC) signal of the power to a direct current (DC) signal; and

a controller configured to control an operation of the power consuming unit based on a magnitude of the DC signal.

3. The wireless power receiver of claim 2, wherein the controller is further configured to:

control the power consuming unit to be operated when the magnitude of the DC signal is less than a predetermined value; and

control the operation of the power consuming unit to be suspended when the magnitude of the DC signal is greater than or equal to the predetermined value.

4. The wireless power receiver of claim 2, wherein the controller comprises:

a current detector configured to detect a current of the DC signal; and

a comparator configured to

compare the current with a predetermined current,

output a high signal when the current is less than the predetermined current to control the power consuming unit to be operated, and

output a low signal when the current is greater than or equal to the predetermined current to control an operation of the power consuming unit to be suspended.

5. The wireless power receiver of claim 1, wherein the power consuming unit comprises:

a power dump resistor comprising a resistance that is in inverse proportion to the initial accommodation power amount; and

a switch configured to enable the power dump resistor to be operated or suspended.

6. The wireless power receiver of claim 1, further comprising:

a rectifier configured to rectify an alternating current (AC) signal of the power to a direct current (DC) signal; and

a DC-to-DC (DC/DC) converter configured to convert a magnitude of the DC signal to a magnitude required by the load.

7. The wireless power receiver of claim 6, wherein the DC/DC converter comprises:

a voltage measuring unit configured to measure a voltage applied to an on-resistor of a transistor connected in series to the rectifier;

an amplifier configured to amplify the measured voltage; and

a comparator configured to

compare the amplified voltage with a predetermined voltage,

output a high signal when the amplified voltage is less than the predetermined voltage to control the power consuming unit to be operated, and

output a low signal when the amplified voltage is greater than or equal to the predetermined voltage to control an operation of the power consuming unit to be suspended.

8. The wireless power receiver of claim 6, wherein the DC/DC converter comprises:

a switch controller configured to control an operation switch of the power consuming unit based on a magnitude of a voltage applied to a capacitor when the receiving unit receives the power.

9. The wireless power receiver of claim 8, wherein the switch controller is further configured to:

power on the operation switch to control the power consuming unit to be operated when the magnitude of the voltage applied to the capacitor is less than or equal to a predetermined value; and

power off the operation switch to control the operation of the power consuming unit to be suspended when the magnitude of the voltage applied to the capacitor is greater than the predetermined value.

10. The wireless power receiver of claim 8, wherein the switch controller comprises:

a power supply configured to supply an amount of a current to the capacitor when the receiving unit receives the power; and

a capacitor configured to store the current.

11. The wireless power receiver of claim 1, further comprising:

a rectifier configured to rectify an alternating current (AC) signal of the power to a direct current (DC) signal;

a controller configured to control an operation of the power consuming unit based on a magnitude of the DC signal; and

an interrupting unit configured to interrupt an electrical connection between the rectifier and the load based on the magnitude of the DC signal.

12. The wireless power receiver of claim 11, wherein the interrupting unit is further configured to:

interrupt the electrical connection when the magnitude of the DC signal is greater than a magnitude of a voltage that is allowed in the load.

13. A wireless power reception method comprising:

wirelessly receiving a power; and

consuming the power, until a voltage applied to a load reaches a predetermined value, so that an amount of a power transferred from a receiving unit to the load is less than or equal to an initial accommodation power amount of the load.

14. The wireless power reception method of claim 13, further comprising:

rectifying an alternating current (AC) signal of the power to a direct current (DC) signal; and

controlling the consuming of the power based on a magnitude of the DC signal.

15. The wireless power reception method of claim 14, further comprising:

consuming the power when the magnitude of the DC signal is less than a predetermined value; and

suspending the consuming of the power when the magnitude of the DC signal is greater than or equal to the predetermined value.

16. The wireless power reception method of claim 14, further comprising:

detecting a current of the DC signal;

comparing the current with a predetermined current;

consuming the power when the current is less than the predetermined current; and

suspending the consuming of the power when the current is greater than or equal to the predetermined current.

17. The wireless power reception method of claim 13, further comprising:

rectifying, by a rectifier, an alternating current (AC) signal of the power to a direct current (DC) signal; and

converting a magnitude of the DC signal to a magnitude required by the load.

18. The wireless power reception method of claim 17, further comprising:

measuring a voltage applied to an on-resistor of a transistor connected in series to the rectifier;

amplifying the measured voltage;

comparing the amplified voltage with a predetermined voltage;

consuming the power when the amplified voltage is less than the predetermined voltage; and

suspending the consuming of the power when the amplified voltage is greater than or equal to the predetermined voltage.

19. The wireless power reception method of claim 13, further comprising:

controlling the consuming of the power based on a magnitude of a voltage applied to a capacitor when the power is received.

20. The wireless power reception method of claim 13, further comprising:

rectifying, by a rectifier, an alternating current (AC) signal of the power to a direct current (DC) signal;

controlling the consuming of the power based on a magnitude of the DC signal; and

interrupting an electrical connection between the rectifier and the load based on the magnitude of the DC signal.