POWER-RECEIVING DEVICE

• US 20160064944A1
• Filed: 02/14/2014
• Published: 03/03/2016
• Est. Priority Date: 04/01/2013
• Status: Abandoned Application

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: HATANAKA, Takezo, TSUDA, Hisashi
• Application Number:
  US14/781,726
• Publication Number:
  US 20160064944A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 7/00309 Overheat or overtemperature protection

Abstract

Transmission efficiency is increased or decreased by a simple arrangement. A power-receiving resonance coil to which power is supplied by a resonance phenomenon of resonance with a power-supplying module, a power-receiving coil which receives the power from the power-receiving resonance coil, and a magnetic member which at least in part overlaps the power-receiving resonance coil in a radial direction in order to increase or decrease magnetic coupling in resonance are provided.

Claims

1. A power-receiving device comprising:

a power-receiving resonance coil which receives power by a resonance phenomenon of resonance with a power-supplying module;

a power-receiving coil configured to receive the power from the power-receiving resonance coil; and

a magnetic member which at least in part overlaps the power-receiving resonance coil in a radial direction in order to increase or decrease magnetic coupling in the resonance.

2. The power-receiving device according to claim 1, wherein, the magnetic member is provided on an inner circumference side of the power-receiving resonance coil.

3. The power-receiving device according to claim 2, wherein, the power-receiving resonance coil has a coil diameter which is identical with a coil diameter of the power-supplying module and is disposed to oppose the power-supplying module, and the magnetic member is cylindrical in shape and extends along the inner circumferential surface of the power-receiving resonance coil, and a one-end position on the power-supplying module side of the power-receiving resonance coil corresponds to a one-end position of the power-supplying module in a coil axis direction.

4. The power-receiving device according to claim 2, wherein, the power-receiving resonance coil has a coil diameter identical with a coil diameter of the power-supplying module and is provided to oppose the power-supplying module, the power-receiving coil is provided on a side opposite to the power-supplying module to have a coil axis corresponding to a coil axis of the power-receiving resonance coil, and the magnetic member is formed to have a cylindrical shape along inner circumferential surfaces of the power-receiving resonance coil and the power-receiving coil, a one-end position on the power-supplying module side of the power-receiving resonance coil corresponds to a one-end position of the power-receiving resonance coil in a coil axis direction, and

the magnetic member includes:

an inner cylindrical portion in which an other-end position which is on a side opposite to the power-supplying module corresponds to an other-end position of the power-receiving coil in the coil axis direction; and

a disc portion which is provided at the other end of the cylindrical portion to oppose an other-end face of the power-receiving coil.

5. The power-receiving device according to claim 1, wherein, to the power-receiving resonance coil, the power is supplied by the resonance phenomenon in which a transmission characteristic of the power supplied to the power-supplying module with respect to a drive frequency is peaked in a drive frequency band lower than a resonance frequency and in a drive frequency band higher than the resonance frequency.

6. The power-receiving device according to claim 1, further comprising an electronic component which is provided in a magnetic field space formed by the resonance phenomenon to have a lower magnetic field strength than in other parts.

7. The power-receiving device according to claim 2, wherein, to the power-receiving resonance coil,

the power is supplied by the resonance phenomenon in which a transmission characteristic of the power supplied to the power-supplying module with respect to a drive frequency is peaked in a drive frequency band lower than a resonance frequency and in a drive frequency band higher than the resonance frequency.

8. The power-receiving device according to claim 3, wherein, to the power-receiving resonance coil,

the power is supplied by the resonance phenomenon in which a transmission characteristic of the power supplied to the power-supplying module with respect to a drive frequency is peaked in a drive frequency band lower than a resonance frequency and in a drive frequency band higher than the resonance frequency.

9. The power-receiving device according to claim 4, wherein, to the power-receiving resonance coil,

the power is supplied by the resonance phenomenon in which a transmission characteristic of the power supplied to the power-supplying module with respect to a drive frequency is peaked in a drive frequency band lower than a resonance frequency and in a drive frequency band higher than the resonance frequency.

10. The power-receiving device according to claim 2, further comprising an electronic component which is provided in a magnetic field space formed by the resonance phenomenon to have a lower magnetic field strength than in other parts.

11. The power-receiving device according to claim 3, further comprising an electronic component which is provided in a magnetic field space formed by the resonance phenomenon to have a lower magnetic field strength than in other parts.

12. The power-receiving device according to claim 4, further comprising an electronic component which is provided in a magnetic field space formed by the resonance phenomenon to have a lower magnetic field strength than in other parts.

13. The power-receiving device according to claim 5, further comprising an electronic component which is provided in a magnetic field space formed by the resonance phenomenon to have a lower magnetic field strength than in other parts.

14. The power-receiving device according to claim 7, further comprising an electronic component which is provided in a magnetic field space formed by the resonance phenomenon to have a lower magnetic field strength than in other parts.

15. The power-receiving device according to claim 8, further comprising an electronic component which is provided in a magnetic field space formed by the resonance phenomenon to have a lower magnetic field strength than in other parts.

16. The power-receiving device according to claim 9, further comprising an electronic component which is provided in a magnetic field space formed by the resonance phenomenon to have a lower magnetic field strength than in other parts.