Method and apparatus for wireless power transmission for efficent power distribution

• US 10,224,749 B2
• Filed: 08/06/2014
• Issued: 03/05/2019
• 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
• Primary Examiner(s): Tran, Thienvu
• Assistant Examiner(s): Stables, David M
• Application Number:
  US14/452,964
• Publication Number:
  US 20150042173A1
• Time in Patent Office: 1,672 Days
• Field of Search: None
• 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 communication unit 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,

wherein the information associated with the reference power comprises information associated with a reference voltage and a reference current,

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

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.

2. The apparatus 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 apparatus 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.

4. The apparatus 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.

5. The apparatus of claim 1, wherein the controller is configured to:

compare the reference power with the amount of power measured; and

control the output power based on the comparison.

6. The apparatus of claim 1, wherein:

the communication unit is configured to receive information associated with an operating efficiency of the wireless power reception apparatus;

the information associated with the operating efficiency of the wireless power reception apparatus comprises the information associated with the reference power and the information associated with the amount of power measured; and

the controller is configured to control the 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.

7. The apparatus of claim 1, wherein the controller further configured to maintain the output power when the reference power is equal to the amount of power measured and control the output power so that the reference power is equal to the amount of power measured when the reference power is not equal to the amount of power measured.

8. 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,

wherein the information associated with the reference power comprises information associated with a reference voltage and a reference current,

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

wherein the controlling comprises controlling an output voltage so that the reference voltage is equal to the measured voltage and controlling an output current so that the reference current is equal to the measured current.

9. The method of claim 8, 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.

10. The method of claim 8, 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.