WIRELESS POWER TRANSMISSION SYSTEM AND MULTI-MODE RESONATOR IN WIRELESS POWER TRANSMISSION SYSTEM

• US 20130134793A1
• Filed: 11/26/2012
• Published: 05/30/2013
• Est. Priority Date: 11/28/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Byung Chul Park, Dong Zo Kim, Eun Seok Park, Jae Hyun Park, Jeong Hae Lee, Jin Sung Choi, Ki Young Kim, Nam Yun Kim, Young Ho Ryu, Young Tack Hong, Yun Kwon Park
• Inventors: RYU, Young Ho, PARK, Eun Seok, KWON, Sang Wook, KIM, Ki Young, KIM, Nam Yun, KIM, Dong Zo, PARK, Yun Kwon, YOON, Chang Wook, CHOI, Jin Sung, HONG, Young Tack, PARK, Byung Chul, PARK, Jae Hyun, LEE, Jeong Hae
• Granted Patent: US 9,287,735 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• 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 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection

Abstract

A wireless power transmission system and a multi-mode resonator in the wireless power transmission system are provided. The multi-mode resonator includes a transmission line portion including unit-cells, the unit-cells including respective ends connected to each other, and each of the unit-cells including a capacitor, an inductor connected in parallel to the capacitor, and a via. The multi-mode resonator further includes a ground conducting portion configured to provide an electrical ground to the transmission line portion through the via of each of the unit-cells.

Claims

1. A multi-mode resonator in a wireless power transmission system, the multi-mode resonator comprising:

a transmission line portion comprising unit-cells, the unit-cells comprising respective ends connected to each other, and each of the unit-cells comprising a capacitor, an inductor connected in parallel to the capacitor, and a via; and

a ground conducting portion configured to provide an electrical ground to the transmission line portion through the via of each of the unit-cells.

2. The multi-mode resonator of claim 1, wherein the inductor comprises a stub connected to the transmission line portion.

3. The multi-mode resonator of claim 1, wherein the unit-cells comprise:

a first unit-cell configured to operate in a power transmission mode to transmit a wireless power to another resonator using a resonance scheme; and

a second unit-cell configured to operate in a communication mode to transmit data to the other resonator,

wherein the wireless power and the data are simultaneously transmitted.

4. The multi-mode resonator of claim 3, wherein:

a resonant frequency of the communication mode is changed when an inductance of the inductor of the second unit-cell is changed; and

a resonant frequency of the power transmission mode is unchanged when an inductance of the inductor of the first unit-cell is changed.

5. The multi-mode resonator of claim 1, wherein:

the unit-cells are configured to operate in a −

1 mode, a mu-zero resonance (MZR) mode, an epsilon-zero resonance (EZR) mode, and a +1 mode, respectively; and

the MZR mode and the EZR mode are simultaneously operated.

6. The multi-mode resonator of claim 1, wherein the via is formed at an end of the inductor.

7. A multi-mode resonator in a wireless power transmission system, the multi-mode resonator comprising:

a transmission line portion comprising a shape of a tetragonal loop; and

a ground conducting portion configured to provide an electrical ground to the transmission line portion,

wherein the transmission line portion further comprises

a first transmission line comprising a first inductor,

a second transmission line comprising a first capacitor,

a third transmission line comprising a second inductor, and

a fourth transmission line comprising a second capacitor.

8. A device in a wireless power transmission system, the device comprising:

a multi-mode resonator; and

a system to generate a wireless power, and transmit the wireless power to another device through the multi-mode resonator,

wherein the multi-mode resonator comprises

a transmission line portion comprising unit-cells, the unit-cells comprising respective ends connected to each other, and each of the unit-cells comprising a via, and

a ground conducting portion configured to provide an electrical ground to the transmission line portion through the via of each of the unit-cells, and shield a magnetic field of the transmission line portion from the system.

9. The device of claim 8, wherein each of the unit-cells further comprises:

a capacitor; and

an inductor connected in parallel to the capacitor.

10. The device of claim 9, wherein the unit-cells comprise:

a first unit-cell configured to operate in a power transmission mode to transmit the wireless power to another resonator using a resonance scheme; and

a second unit-cell configured to operate in a communication mode to transmit data to the other resonator,

wherein the wireless power and the data are simultaneously transmitted.

11. The device of claim 10, wherein:

a resonant frequency of the communication mode is changed when an inductance of the inductor of the second unit-cell is changed; and

a resonant frequency of the power transmission mode is unchanged when an inductance of the inductor of the first unit-cell is changed.

12. The device of claim 8, wherein:

the unit-cells are configured to operate in a −

1 mode, a mu-zero resonance (MZR) mode, an epsilon-zero resonance (EZR) mode, and a +1 mode, respectively; and

the MZR mode and the EZR mode are simultaneously operated.

13. The device of claim 12, wherein the −

1 mode, the MZR mode, the EZR mode, and the +1 mode comprise different respective resonant frequencies.

14. A device in a wireless power transmission system, the device comprising:

a multi-mode resonator; and

a system configured to receive a wireless power from another device through the multi-mode resonator, and supply the wireless power to a load,

wherein the multi-mode resonator comprises

a transmission line portion comprising unit-cells, the unit-cells comprising respective ends connected to each other, and each of the unit-cells comprising a via, and

a ground conducting portion configured to provide an electrical ground to the transmission line portion through the via of each of the unit-cells, and shield a magnetic field of the transmission line portion from the system.

15. The device of claim 14, wherein each of the unit-cells comprises:

a capacitor; and

an inductor connected in parallel to the capacitor.

16. The device of claim 15, wherein the unit-cells comprise:

a first unit-cell configured to operate in a power reception mode to receive the wireless power from another resonator using a resonance scheme; and

a second unit-cell configured to operate in a communication mode to receive data from the other resonator,

wherein the wireless power and the data are simultaneously received.

17. The device of claim 16, wherein:

a resonant frequency of the communication mode is changed when an inductance of the inductor of the second unit-cell is changed; and

a resonant frequency of the power reception mode is unchanged when an inductance of the inductor of the first unit-cell is changed.

18. The device of claim 14, wherein:

the unit-cells are configured to operate in a −

1 mode, a mu-zero resonance (MZR) mode, an epsilon-zero resonance (EZR) mode, and a +1 mode, respectively; and

the MZR mode and the EZR mode are simultaneously operated.

19. The device of claim 18, wherein:

the −

1 mode and the EZR mode are used to perform near field communication (NFC);

the MZR mode is used to perform power reception; and

the +1 mode is used to perform radio frequency (RF) communication or the NFC.

20. The device of claim 14, wherein the units are configured to operate in a number of modes based on a number of the unit-cells.