Wireless power receiver

• US 10,511,192 B2
• Filed: 04/27/2017
• Issued: 12/17/2019
• Est. Priority Date: 05/27/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Jae-Hyun, Kim, Dong-Zo, Kim, Do-Won, Kim, Bong-Chul, Yeo, Sung-Ku, Ryu, Young-Ho, Lee, Chong-Min
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Bukhari, Aqeel H
• Application Number:
  US15/499,382
• Publication Number:
  US 20170346342A1
• Time in Patent Office: 964 Days
• Field of Search: None
• CPC Class Codes: H01F 27/2804 Printed windings
• 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 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type

Abstract

An electronic device is provided that includes a housing and a power receiver disposed within the housing. The power receiver includes a conductive pattern for receiving power wirelessly. The conductive pattern includes a main coil having a plurality of turns, a first sub-coil formed at an input port of the main coil, and a second sub-coil formed at an output port of the main coil. The electronic device also includes a controller configured to control to receive power using the conductive pattern.

Claims

1. An electronic device comprising:

a housing;

a rectifier configured to rectify power provided through a first port and a second port of a power receiving circuit; and

the power receiving circuit disposed within the housing and including a conductive pattern for wirelessly receiving the power, the conductive pattern comprising;

a main coil,

a first sub-coil, wherein a first end of the first sub-coil is connected to a first end of the main coil and a second end of the first sub-coil is connected to the first port, and

a second sub-coil, wherein a first end of the second sub-coil is connected to a second end of the main coil and a second end of the second sub-coil is connected to the second port.

2. The electronic device of claim 1, wherein each of the first sub-coil and the second-sub-coil has a resonance frequency similar to a resonance frequency measured after the main coil is disposed, the first sub-coil is connected serially to the first port, and the second sub-coil is connected serially to the second port.

3. The electronic device of claim 2, wherein the first end and the second end of the first sub-coil are connected to a first capacitor, and the first end and the second end of the second sub-coil are connected to a second capacitor for controlling a resonance frequency.

4. The electronic device of claim 2, wherein the first end and the second end of the first sub-coil are connected to a first variable inter-digital capacitor, and the first end and the second end of the second sub-coil are connected to a second variable inter-digital capacitor, for controlling a resonance frequency.

5. The electronic device of claim 2, wherein the first end and the second end of the first sub-coil are connected to a first resistor, and the first end and the second end of the second sub-coil are connected to a second resistor, for controlling a resonance frequency.

6. The electronic device of claim 1, wherein each of the first sub-coil and the second sub-coil comprises at least two turns, and the first sub-coil is shaped into a spire that is larger than the second sub-coil.

7. The electronic device of claim 6, wherein the first sub-coil is different from the second sub-coil in at least one of size, number of turns, and turn interval.

8. The electronic device of claim 6, wherein:

a dependent coil is formed within the first sub-coil,

wherein the dependent coil comprises at least two turns, and

the dependent coil is not connected to the first sub-coil.

9. The electronic device of claim 1, wherein the first port and the second port are connected to a first capacitor and a second capacitor for controlling a resonance frequency.

10. The electronic device of claim 9, wherein the first capacitor is connected in parallel to the first end of the first sub-coil and the first end of the second sub-coil, and the second capacitor is connected in parallel to the second end of the first sub-coil and the second end of the second sub-coil.

11. The electronic device of claim 1, wherein the first port and the second port of the main coil are connected to a first variable inter-digital capacitor and a second variable inter-digital capacitor for controlling a resonance frequency.

12. The electronic device of claim 11, wherein the first variable inter-digital capacitor is connected in parallel to the first end of the first sub-coil and the first end of the second sub-coil, and the second variable inter-digital capacitor is connected in parallel to the second end of the first sub-coil and the second end of the second sub-coil.

13. The electronic device of claim 1, wherein the main coil, the first sub-coil, and the second sub-coil are wound in the same direction.

14. The electronic device of claim 1, wherein the controller is further configured to sense radiation of electromagnetic waves generated during conversion of the power to direct current.

15. The electronic device of claim 14, wherein the first sub-coil and the second sub-coil are formed at positions at which the radiation of the generated electromagnetic waves is minimized.