WIRELESS POWER TRANSMITTER DEVICE, WIRELESS POWER RECEIVER DEVICE, SYSTEM FOR TRANSFERRING POWER WIRELESSLY

• US 20180091005A1
• Filed: 08/10/2017
• Published: 03/29/2018
• Est. Priority Date: 09/26/2016
• Status: Active Grant

• Current Assignee: Industry-Academic Cooperation Foundation Yonsei University
• Original Assignee: Industry Academic Cooperation Foundation
• Inventors: LEE, Yongshik, LIM, Tae Jun
• Granted Patent: US 11,218,033 B2
• Time in Patent Office: Days
• 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 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• 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 90/14 Plug-in electric vehicles

Abstract

The present disclosure relates to a wireless power transmitter device, a wireless power receiver device, and a system for transferring power wirelessly. A wireless power transmitter device according to an embodiment of the present disclosure can include: a driving coil configured to transmit power wirelessly; a magnetic coupler mutually inductively coupled with the driving coil; and a resonance frequency adjuster part configured to adjust the resonance frequency of the magnetic coupler, where the magnetic coupler can include a plurality of coils arranged in a region opposite one side of the driving coil.

Claims

1. A wireless power transmitter device comprising:

a driving coil configured to transmit power wirelessly;

a magnetic coupler mutually inductively coupled with the driving coil; and

a resonance frequency adjuster part configured to adjust a resonance frequency of the magnetic coupler,

wherein the magnetic coupler comprises a plurality of coils arranged in a region opposite one side of the driving coil.

2. The wireless power transmitter device of claim 1, wherein the plurality of coils are arranged along at least one direction of an up/down direction, left/right direction, and a radial direction on a same plane.

3. The wireless power transmitter device of claim 2, wherein the plurality of coils are arranged symmetrically, and at least two of the plurality of coils are provided to have a different area.

4. The wireless power transmitter device of claim 1, further comprising:

a sensor part configured to detect a position of a wireless power receiver receiving the power wirelessly.

5. The wireless power transmitter device of claim 4, wherein the magnetic coupler further comprises variable capacitors installed on the plurality of coils respectively.

6. The wireless power transmitter device of claim 5, wherein the resonance frequency adjuster part adjusts a capacitance of a particular variable capacitor from among the variable capacitors according to the position of the wireless power receiver detected by the sensor part.

7. A wireless power receiver device comprising:

a driving coil configured to receive power wirelessly;

a magnetic coupler mutually inductively coupled with the driving coil; and

a resonance frequency adjuster part configured to adjust a resonance frequency of the magnetic coupler,

wherein the magnetic coupler comprises a plurality of coils arranged in a region opposite one side of the driving coil.

8. The wireless power receiver of claim 7, wherein the plurality of coils are arranged along at least one direction of an up-down direction, left-right direction, and a radial direction on a same plane.

9. The wireless power receiver of claim 8, wherein the plurality of coils are arranged symmetrically, and at least two of the plurality of coils are provided to have a different area.

10. The wireless power receiver of claim 7, further comprising:

a sensor part configured to detect a position of a wireless power transmitter transmitting the power wirelessly.

11. The wireless power receiver of claim 10, wherein the magnetic coupler further comprises variable capacitors installed on the plurality of coils respectively.

12. The wireless power receiver of claim 11, wherein the resonance frequency adjuster part adjusts a capacitance of a particular variable capacitor from among the variable capacitors according to the position of the wireless power transmitter detected by the sensor part.

13. A wireless power transmitter device comprising:

a driving coil configured to transmit power wirelessly;

a magnetic coupler mutually inductively coupled with the driving coil and comprising a plurality of coils; and

a resonance frequency adjuster part configured to adjust a resonance frequency of at least one of the plurality of coils.

14. The wireless power transmitter device of claim 13, wherein a variable capacitor is installed on at least one of the plurality of coils, and the resonance frequency adjuster part adjusts a resonance frequency of a particular variable capacitor from among the at least one variable capacitor.

15. A wireless power receiver device comprising:

a driving coil configured to receive power wirelessly;

a magnetic coupler mutually inductively coupled with the driving coil and comprising a plurality of coils; and

a resonance frequency adjuster part configured to adjust a resonance frequency of at least one of the plurality of coils.

16. The wireless power receiver device of claim 15, wherein a variable capacitor is installed on at least one of the plurality of coils, and the resonance frequency adjuster part adjusts a resonance frequency of a particular variable capacitor from among the at least one variable capacitor.