Wireless power transmitter device, wireless power receiver device, system for transferring power wirelessly

Patent metadata

Field	Value
Publication number	US-2018091005-A1
Application number	US-201715674013-A
Country	US
Kind code	A1
Filing date	Aug 10, 2017
Priority date	Sep 26, 2016
Publication date	Mar 29, 2018
Grant date	—

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.

First claim

What is claimed is:

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.

Assignees

• Univ Yonsei Iacf

Inventors

• Lee Yongshik
• Lim Tae Jun

Classifications

• H02J50/12 Primary

  of the resonant type · CPC title

• H02J50/90 Primary

  involving detection or optimisation of position, e.g. alignment · CPC title

• H01F38/14

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• Y02T90/14

  Plug-in electric vehicles · CPC title

• Y02T10/7072

  Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title