SOURCE DEVICE AND METHOD FOR CONTROLLING MAGNETIC FIELD USING TWO SOURCE RESONATORS IN WIRELESS POWER TRANSMISSION SYSTEM

• US 20130049456A1
• Filed: 08/23/2012
• Published: 02/28/2013
• Est. Priority Date: 08/25/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Ki Young, Park, Eun Seok, Choi, Jin Sung, Kwon, Sang Wook, Kim, Nam Yun, Kim, Dong Zo, Park, Yun Kwon, Ryu, Young Ho, Yoon, Chang Wook, Hong, Young Tack
• Granted Patent: US 9,493,084 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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: 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 source device and a method for controlling a magnetic field using two source resonators in a wireless power transmission system are provided. A device configured to control a magnetic field, includes resonators configured to form the magnetic field to transmit power to another device. The device further includes a magnetic field shape determining unit configured to determine a shape of the magnetic field. The device further includes a phase changing unit configured to change a phase of at least one of the resonators to form the magnetic field in the determined shape.

Claims

1. A device configured to control a magnetic field, the device comprising:

resonators configured to form the magnetic field to transmit power to another device;

a magnetic field shape determining unit configured to determine a shape of the magnetic field; and

a phase changing unit configured to change a phase of at least one of the resonators to form the magnetic field in the determined shape.

2. The device of claim 1, wherein the magnetic field shape determining unit is further configured to:

determine the shape of the magnetic field based on a user request.

3. The device of claim 1, further comprising:

a target verification unit configured to verify a number of devices to which the power is to be transmitted, and positions of the devices,

wherein the magnetic field shape determining unit is further configured to determine the shape of the magnetic field based on the number of the devices and the positions of the devices to optimize transmission rates between the device and the devices, respectively.

4. The device of claim 1, wherein the phase changing unit is further configured to:

set a phase difference between the resonators to zero degrees if the determined shape corresponds to a shape in which a magnitude of the magnetic field between the resonators is at a maximum.

5. The device of claim 1, wherein the phase changing unit is further configured to:

set a phase difference between the resonators to 180 degrees if the determined shape corresponds to a shape in which a magnitude of the magnetic field between the resonators is at a minimum and a magnitude of the magnetic field outside of the resonators is relatively large.

6. The device of claim 1, wherein the phase changing unit is further configured to:

set a phase difference between the resonators to be between zero degrees and 180 degrees based on the determined shape.

7. The device of claim 1, wherein the phase changing unit is further configured to:

delay transfer of a current to be input into the at least one of the resonators to change the phase.

8. A device configured to control a magnetic field, the device comprising:

at least two resonators configured to form the magnetic field to transmit power to devices;

a target verification unit configured to verify a number of the devices and positions of the devices;

a magnetic field shape determining unit configured to determine a shape of the magnetic field based on the number of the devices and the positions of the devices to optimize transmission rates between the device and the devices, respectively; and

a phase changing unit configured to change a phase of at least one of the at least two resonators to form the magnetic field in the determined shape.

9. A method of controlling, by a device, a magnetic field, the method comprising:

determining a shape of the magnetic field to be formed by resonators to transmit power to another device; and

changing a phase of at least one of the resonators to form the magnetic field in the determined shape.

10. The method of claim 9, wherein the determining comprises:

determining the shape of the magnetic field based on a user request.

11. The method of claim 9, further comprising:

verifying a number of devices to which the power is to be transmitted, and positions of the devices,

wherein the determining comprises determining the shape of the magnetic field based on the number of the devices and the positions of the devices to optimize transmission rates between the device and the devices, respectively.

12. The method of claim 9, wherein the changing comprises:

setting a phase difference between the resonators to zero degrees if the determined shape corresponds to a shape in which a magnitude of the magnetic field between the resonators is at a maximum.

13. The method of claim 9, wherein the changing comprises:

setting a phase difference between the resonators to 180 degrees if the determined shape corresponds to a shape in which a magnitude of the magnetic field between the resonators is at a minimum and a magnitude of the magnetic field outside of the resonators is relatively large.

14. The method of claim 9, wherein the changing comprises:

setting a phase difference between the resonators to be between zero degrees and 180 degrees based on the determined shape.

15. The method of claim 9, wherein the changing comprises:

delaying transfer of a current to be input into the at least one of the resonators to change the phase.

16. A non-transitory computer-readable storage medium storing a program comprising instructions to cause a computer to perform the method of claim 9.

17. A method of controlling, by a device, a magnetic field, the method comprising:

verifying a number of devices to which power is to be transmitted, and positions of the devices;

determining a shape of the magnetic field to be formed by at least two resonators to transmit the power to the devices based on the number of the devices and the positions of the devices to optimize transmission rates between the device and the devices, respectively; and

changing a phase of at least one of the at least two resonators to form the magnetic field in the determined shape.

18. A non-transitory computer-readable storage medium storing a program comprising instructions to cause a computer to perform the method of claim 17.

19. An electric vehicle comprising:

resonators configured to form a magnetic field to transmit power to another electric vehicle;

a magnetic field shape determining unit configured to determine a shape of the magnetic field; and

a phase changing unit configured to change a phase of at least one of the resonators to form the magnetic field in the determined shape.

20. The electric vehicle of claim 19, further comprising:

a target verification unit configured to verify a number of electric vehicles to which the power is to be transmitted, and positions of the electric vehicles,

wherein the magnetic field shape determining unit is further configured to determine the shape of the magnetic field based on the number of the electric vehicles and the positions of the electric vehicles to optimize transmission rates between the electric vehicle and the electric vehicles, respectively.