METHOD AND APPARATUS FOR WIRELESS POWER TRANSMISSION FOR EFFICENT POWER DISTRIBUTION

• US 20150042173A1
• Filed: 08/06/2014
• Published: 02/12/2015
• Est. Priority Date: 08/08/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Byoung Hee, Kwon, Sang Wook, Kim, Ki Young, Kim, Dong Zo, Kim, Bong Chul, Park, Yun Kwon, Park, Jae Hyun, Song, Keum Su, Ahn, Chi Hyung, Ryu, Young Ho
• Granted Patent: US 10,224,749 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 53/124 Detection or removal of foreign bodies
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• 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 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection
• CPC Class Codes: H02M 7/06 using discharge tubes without control electrode or semiconductor devices without control electrode
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A wireless power transmission apparatus includes a communicator configured to receive information associated with a reference power of a wireless power reception apparatus and information associated with a power measured at an input terminal of a direct current-to-direct current (DC/DC) converter of the wireless power reception apparatus, a controller configured to control an output power based on the information associated with the reference power and the information associated with the power measured, and a source resonator configured to transmit the output power to the wireless power reception apparatus by resonating with a target resonator.

Claims

1. A wireless power transmission apparatus comprising:

a communicator configured to receive information associated with a reference power of a wireless power reception apparatus and information associated with an amount of power measured at an input terminal of a direct current-to-direct current (DC/DC) converter of the wireless power reception apparatus;

a controller configured to control an output power based on the information associated with the reference power and the information associated with the amount of power measured; and

a source resonator configured to transmit the output power to the wireless power reception apparatus by resonating with a target resonator.

2. The method of claim 1, wherein the controller is further configured to control the output power so that the reference power is equal to the amount of power measured.

3. The method of claim 1, wherein the information associated with the reference power comprises information associated with a reference voltage and a reference current;

and

the information associated with the amount of power measured comprises information associated with a measured voltage and a measured current.

4. The method of claim 3, wherein the controller comprises:

an output voltage controller configured to control an output voltage so that the reference voltage is equal to the measured voltage; and

an output current controller configured to control an output current so that the reference current is equal to the measured current.

5. The method of claim 1, wherein there are a plurality of wireless power reception apparatuses;

and

the controller is further configured to distribute a total power output to the plurality of wireless power reception apparatuses based on the information associated with the reference power and the information associated with the amount of power measured received from each of the plurality of apparatuses.

6. The method of claim 1, wherein the information associated with the amount of power measured is measured between a rectifier of the wireless power reception apparatus and the DC/DC converter.

7. A wireless power reception apparatus comprising:

a power receiver configured to receive power from a target resonator configured to resonate with a source resonator;

a direct current-to-direct current (DC/DC) converter configured to convert the received power;

a power information measurer configured to measure, at an input terminal of the DC/DC converter, information associated with an amount of the received power;

a controller configured to set information associated with a reference power; and

a communicator configured to transmit the information associated with the reference power and the information associated with the amount of power measured to a wireless power transmission apparatus.

8. The apparatus of claim 7, wherein the information associated with the reference power comprises information associated with a reference voltage and a reference current;

and

the information associated with the amount of power measured comprises information associated with a measured voltage and a measured current.

9. The apparatus of claim 8, wherein the power measurer comprises:

a voltage measurer configured to measure a voltage of the received power; and

a current measurer configured to measure a current of the received power.

10. The apparatus of claim 8, wherein the controller is further configured to set the information associated with the reference power based on information associated with a predetermined required power comprising information associated with a predetermined required voltage and a predetermined required current.

11. The apparatus of claim 10, wherein the controller is further configured to set the reference voltage within a threshold range determined by a selected ratio based on the predetermined required voltage.

12. The apparatus of claim 11, wherein the controller is further configured to set the reference current so that the reference power is within a predetermined threshold range of the required power.

13. The apparatus of claim 10, wherein the predetermined required voltage is variable;

and

the controller is further configured to set the reference voltage based on a predetermined voltage difference between the reference voltage and the predetermined required voltage.

14. The apparatus of claim 13, wherein the controller is further configured to set the reference current so that the reference power is within a predetermined threshold range of the required power.

15. The apparatus of claim 7, further comprising a rectifier configured to rectify the received power and provide the rectified power to the DC/DC converter;

wherein the power information measurer is further configured to measure the information associated with the amount of the received power between the rectifier and the DC/DC converter.

16. A wireless power transmission method comprising:

receiving information associated with a reference power of a wireless power reception apparatus and information associated with an amount of power measured at an input terminal of a direct current-to-direct current (DC/DC) converter of the wireless power reception apparatus;

controlling an output power based on the information associated with the reference power and the information associated with the amount of power measured; and

transmitting the output power to the wireless power reception apparatus by resonating with a target resonator.

17. The method of claim 16, wherein the information associated with the amount of power measured is measured between a rectifier of the wireless power reception apparatus and the DC/DC converter.

18. The method of claim 16, wherein there are a plurality of wireless power reception apparatuses;

and

the controlling of the output power comprises distributing a total power output to the plurality of wireless power reception apparatuses based on the information associated with the reference power and the information associated with the amount of power measured received from each of the plurality of wireless power reception apparatuses.

19. A wireless power transmission apparatus comprising:

a communicator configured to receive information associated with an operating efficiency of a wireless power reception apparatus;

a controller configured to control an output power to increase the operating efficiency of the wireless power reception apparatus based on the information associated with the operating efficiency of the wireless power reception apparatus; and

a source resonator configured to transmit the output power to the wireless power reception apparatus by resonating with a target resonator.

20. The apparatus of claim 19, wherein the information associated with the operating efficiency of the wireless power reception apparatus comprises:

information associated with a desired state of the wireless power reception apparatus; and

information associated with a current state of the wireless power reception apparatus; and

wherein the controller is further configured to control the output power to reduce a difference between the desired state of the wireless power reception apparatus and the current state of the wireless power reception apparatus to increase the operating efficiency of the wireless power reception apparatus.

21. The apparatus of claim 20, wherein the desired state of the wireless power reception apparatus comprises any one or any combination of a desired power to be received by the wireless power reception apparatus, a desired voltage to be received by the wireless power reception apparatus, and a desired current to be received by the wireless power reception apparatus;

and

the current state of the wireless power reception apparatus comprises any one or any combination of a power currently being received by the wireless power reception apparatus, a voltage currently being received by the wireless power reception apparatus, and a current currently being received by the wireless power reception apparatus.

22. The apparatus of claim 20, wherein the desired state of the wireless power reception apparatus is a desired state at an input terminal of a direct current-to-direct current (DC/DC) converter;

and

the current state of the wireless power reception apparatus is a current state measured at the input terminal of the DC/DC converter.