Wireless power receiver and external inductor connected thereto

• US 10,109,415 B2
• Filed: 01/07/2016
• Issued: 10/23/2018
• Est. Priority Date: 01/07/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Jae-Hyun, Ryu, Young-Ho, Kim, Do-Won, Kwon, Sang-Wook, Kim, Dong-Zo, Park, Sung-Bum, Yeo, Sung-Ku
• Primary Examiner(s): Chen, Sibin
• Application Number:
  US14/990,503
• Publication Number:
  US 20160197491A1
• Time in Patent Office: 1,020 Days
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10

Abstract

Disclosed is an external inductor that is connected to a wireless power receiver. The external inductor may include a conductor including at least one main slit, a first connecting unit that connects a first point of the conductor and the wireless power receiver with each other, and a second connecting unit that connects a second point of the conductor and the wireless power receiver with each other.

Claims

1. A wireless power receiver, comprising:

a conductor including a slit;

a power processing unit configured to process received wireless power;

a first connecting unit configured to connect a first point of the conductor to the power processing unit; and

a second connecting unit configured to connect a second point of the conductor to the power processing unit,

wherein positions of the first connecting unit and the second connecting unit are determined according to a structure of the slit.

2. The wireless power receiver of claim 1, further comprising an insulator disposed at least on a portion of the conductor and below the conductor.

3. The wireless power receiver of claim 1, further comprising an insulator disposed in the slit.

4. The wireless power receiver of claim 2, wherein the insulator comprises at least one of glass and plastic.

5. The wireless power receiver of claim 1, wherein the conductor is at least a part of a metal case, and wherein the metal case is at least a part of a rear cover of the wireless power receiver.

6. The wireless power receiver of claim 1, wherein the conductor is detachable from the wireless power receiver.

7. The wireless power receiver of claim 1, wherein the conductor is configured with the power processing unit to generate induced current at a specific resonance frequency to receive the wireless power based on resonance method.

8. The wireless power receiver of claim 7, wherein the power processing unit includes at least one capacitor, and the conductor and the at least one capacitor form a resonance circuit having the specific resonance frequency.

9. The wireless power receiver of claim 7, wherein the induced current flows from the first point to the second point.

10. The wireless power receiver of claim 7, wherein the power processing unit includes:

a first capacitor, wherein a first end of the first capacitor is connected to the first connecting unit and a second end of the first capacitor is connected to the second connecting unit;

a second capacitor, wherein a first end of the second capacitor is connected to the first connecting unit and to the first end of the first capacitor; and

a third capacitor, wherein a first end of third capacitor is connected to the second connecting unit and to the second end of the first capacitor.

11. The wireless power receiver of claim 1, wherein the conductor is configured with the power processing unit to receive wireless power based on inductive method.

12. The wireless power receiver of claim 11, wherein the conductor is configured to inductively couple with an inductor of a wireless power transmitter to generate an induced current in the conductor.

13. The wireless power receiver of claim 12, wherein the induced current flows from the first point to the second point.

14. The wireless power receiver of claim 11, wherein the power processing unit includes:

a first capacitor, wherein a first end of the first capacitor is connected to the first connecting unit;

a second capacitor, wherein a first end of the second capacitor is connected to the second connecting unit; and

a third capacitor, wherein a first end of the third capacitor is connected to a second end of the first capacitor, and a second end of the third capacitor is connected to a second end of the second capacitor.

15. The wireless power receiver of claim 1, wherein the conductor comprises a fastening unit configured to physically fasten an external inductor to the wireless power receiver.

16. The wireless power receiver of claim 1, wherein the slit comprises at least one slit and at least one auxiliary slit that is connected to the at least one slit.

17. The wireless power receiver of claim 16, wherein the at least one auxiliary slit is perpendicular to the at least one slit at a junction of the at least one slit and the at least one auxiliary slit.

18. The wireless power receiver of claim 1, wherein the slit in the conductor has a shape that causes a remaining portion of the conductor to be substantially in shape of a loop.