WIRELESS POWER TRANSMISSION SYSTEM, AND METHOD OF CONTROLLING POWER IN WIRELESS POWER TRANSMISSION SYSTEM BASED ON DETECTION PARAMETER

• US 20130127256A1
• Filed: 11/13/2012
• Published: 05/23/2013
• Est. Priority Date: 11/18/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Chang Wook Yoon, Sang Wook Kwon
• Inventors: Kim, Nam Yun, Kwon, Sang Wook, Park, Yun Kwon, Park, Eun Seok, Kim, Ki Young, Ryu, Young Ho, Kim, Dong Zo, Choi, Jin Sung, Yoon, Chang Wook
• Granted Patent: US 9,748,800 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection

Abstract

A wireless power transmission system, and a method of controlling power in the wireless power transmission system based on a detection parameter are provided. The method includes transmitting a request signal to a device. The method further includes receiving, from the device, a response signal corresponding to the request signal, the response signal including a parameter of the device. The method further includes generating an operation power based on the parameter of the device, the operation power being used for an operation of the device.

Claims

1. A method of controlling power in a wireless power transmission system, the method comprising:

transmitting a request signal to a device;

receiving, from the device, a response signal corresponding to the request signal, the response signal comprising a parameter of the device; and

generating an operation power based on the parameter of the device, the operation power being used for an operation of the device.

2. The method of claim 1, further comprising:

transmitting a wake-up power to the device, using a magnetic coupling, the wake-up power being used to activate a communication function and a control function of the device.

3. The method of claim 1, wherein the parameter of the device comprises information regarding an input voltage and an output voltage of a rectifier of the device, or an input current and an output current of the rectifier, or an input voltage and an output voltage of a direct current (DC)-to-DC (DC/DC) converter of the device, or an input current and an output current of the DC/DC converter, or a voltage and a current of a battery of the device, or any combination thereof.

4. The method of claim 1, further comprising:

transmitting a wake-up power to the device, using a magnetic coupling, the wake-up power being used to activate a communication function and a control function of the device,

wherein the generating comprises

acquiring a parameter of another device that is associated with an amount of the wake-up power,

calculating a power transmission efficiency of the other device based on the parameter of the other device, and the parameter of the device, and

determining an amount of the operation power based on the power transmission efficiency.

5. The method of claim 4, wherein the parameter of the other device comprises information regarding an input voltage and an input current of a power amplifier of the other device, or an output voltage and an output current of the power amplifier, or any combination thereof.

6. The method of claim 1, further comprising:

transmitting the operation power to the device, using a magnetic coupling;

sending, to the device, a request for the parameter of the device;

re-receiving, from the device, the parameter of the device; and

changing an amount of the operation power based on the re-received parameter of the device.

7. The method of claim 6, wherein the changing comprises:

calculating an efficiency of a DC/DC converter of the device based on an input current and an output current of the DC/DC converter that is included in the re-received parameter of the device; and

changing the amount of the operation power based on the efficiency of the DC/DC converter.

8. The method of claim 6, wherein the re-received parameter of the device comprises information regarding an input voltage and an output voltage of a rectifier of the device, or an input current and an output current of the rectifier, or an input voltage and an output voltage of the DC/DC converter of the device, or an input current and an output current of the DC/DC converter, or a voltage and a current of a battery of the device, or any combination thereof.

9. A method of receiving power in a wireless power transmission system, the method comprising:

receiving a request signal from a device;

transmitting, to the device, a response signal corresponding to the request signal, the response signal comprising a parameter of another device; and

receiving an operation power from the device, the operation power being generated based on the parameter of the other device.

10. The method of claim 9, further comprising:

receiving a wake-up power from the device, using a magnetic coupling; and

activating a communication function and a control function of the other device, using the wake-up power.

11. The method of claim 9, wherein the parameter of the other device comprises information regarding an input voltage and an output voltage of a rectifier of the other device, or an input current and an output current of the rectifier, or an input voltage and an output voltage of a direct current (DC)-to-DC (DC/DC) converter of the other device, or an input current and an output current of the DC/DC converter, or a voltage and a current of a battery of the other device, or any combination thereof.

12. The method of claim 9, further comprising:

receiving the operation power from the device, using a magnetic coupling;

receiving, from the device, a request for the parameter of the other device;

acquiring the parameter of the other device; and

re-transmitting, to the device, the acquired parameter of the other device.

13. A device of a wireless power transmission system, the device comprising:

a power converter configured to generate an operation power, the operation power being used for an operation of another device; and

a control/communication unit configured to

transmit a request signal to the other device,

receive, from the other device, a response signal corresponding to the request signal, the response signal comprising a parameter of the other device, and

control the power converter to generate the operation power based on the parameter of the other device.

14. The device of claim 13, wherein the power converter is further configured to:

convert a direct current (DC) voltage to an alternating current (AC) voltage using a resonant frequency, to generate a wake-up power and the operation power, the wake-up power being used to activate a communication function and a control function of the other device.

15. The device of claim 13, further comprising:

a resonator configured to transmit, to the other device, a wake-up power and the operation power, using a magnetic coupling, the wake-up power being used to activate a communication function and a control function of the other device.

16. The device of claim 13, wherein the parameter of the other device comprises information regarding an input voltage and an output voltage of a rectifier of the other device, or an input current and an output current of the rectifier, or an input voltage and an output voltage of a DC-to-DC (DC/DC) converter of the other device, or an input current and an output current of the DC/DC converter, or a voltage and a current of a battery of the other device, or any combination thereof.

17. The device of claim 13, wherein:

the power converter is further configured to generate a wake-up power, the wake-up power being used to activate a communication function and a control function of the other device,

the control/communication unit is further configured to

acquire a parameter of the device that is associated with an amount of the wake-up power,

calculate a power transmission efficiency of the device based on the parameter of the device, and the parameter of the other device, and

determine an amount of the operation power based on the power transmission efficiency.

18. The device of claim 17, further comprising:

a power amplifier,

wherein the parameter of the device comprises information regarding an input voltage and an input current of the power amplifier, or an output voltage and an output current of the power amplifier, or any combination thereof.

19. A device of a wireless power transmission system, the device comprising:

a control/communication unit configured to

receive a request signal from another device, and

transmit, to the other device, a response signal corresponding to the request signal, the response signal comprising a parameter of the device; and

a resonator configured to receive an operation power from the other device, the operation power being generated based on the parameter of the device.

20. The device of claim 19, wherein:

the resonator is further configured to receive, from the other device, a wake-up power and the operation power, using a magnetic coupling; and

the control/communication unit is further configured to activate a communication function and a control function of the device, using the wake-up power.

21. The device of claim 19, further comprising:

a rectifier;

a direct current (DC)-to-DC (DC/DC) converter; and

a battery,

wherein the parameter of the device comprises information regarding an input voltage and an output voltage of the rectifier, or an input current and an output current of the rectifier, or an input voltage and an output voltage of the DC/DC converter, or an input current and an output current of the DC/DC converter, or a voltage and a current of the battery, or any combination thereof.