Wireless power receiver

Patent metadata

Field	Value
Publication number	US-10075018-B2
Application number	US-201514965421-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Dec 10, 2014
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A wireless power receiver is disclosed. A wireless power receiver according to various embodiments of the present disclosure includes a resonant reception unit configured to receive wireless power by a resonance scheme; an inductive reception unit configured to receive wireless power by an induction scheme; and a power processing unit configured to process wireless power received at the resonant reception unit and the inductive reception unit. When the wireless power is received by the induction scheme, a current flowing in the inductive reception unit is greater than a current flowing in the resonant reception unit, and when the wireless power is received by the resonance scheme, a current flowing in the resonant reception unit is greater than a current flowing in the inductive reception unit.

First claim

What is claimed is:

1. A wireless power receiver configured to receive wireless power, the wireless power receiver comprising:
a resonant reception unit configured to receive wireless power by a resonance scheme at a second frequency;
an inductive reception unit configured to receive wireless power by an induction scheme at a first frequency; and
a power processing unit configured to process wireless power received at the resonant reception unit and the inductive reception unit;
wherein when the wireless power is received by the induction scheme, a current flowing in the inductive reception unit is greater than a current flowing in the resonant reception unit, and when the wireless power is received by the resonance scheme, a current flowing in the resonant reception unit is greater than a current flowing in the inductive reception unit,
wherein the resonant reception unit comprises a second circuit comprising at least one second coil an at least one fourth capacitor, the inductive reception unit comprises a first circuit comprising at least one first coil and at least one first capacitor, and
wherein the first circuit, the second circuit, and the power processing unit are connected in parallel.

2. The wireless power receiver of claim 1 , wherein the resonant reception unit and the inductive reception unit are connected in parallel.

3. The wireless power receiver of claim 2 , wherein the inductive reception unit comprises:
the first coil having a first end and a second end, and the first end of the first coil being connected to the power processing unit;
the first capacitor having a first end and a second end, with the first end of the first capacitor being connected to the second end of the first coil; and
a second capacitor having a first end and a second end, with the first end of the second capacitor being connected to the first end of the first coil, and with the second end of the second capacitor being connected to the second end of the first capacitor; and
wherein the resonant reception unit comprises:
the second coil having a first end and a second end;
a third capacitor with a first end of the third capacitor connected to the first end of the second coil, and with a second end of the third capacitor connected to the second end of the first capacitor; and
the fourth capacitor having a first end and a second end, with the first end of the fourth capacitor being connected to the second end of the second coil, and with the second end of the fourth capacitor connected to the second end of the second coil, the first end of the first coil, and the second end of the third capacitor.

4. The wireless power receiver of claim 3 , wherein the second capacitor, the third capacitor, the fourth capacitor and the second coil constitute a resonant circuit.

5. The wireless power receiver of claim 3 , wherein at the second frequency defined in the resonance scheme, an impedance of the first coil and the first capacitor in view of the power processing unit exceeds a threshold.

6. The wireless power receiver of claim 3 , wherein at the first frequency, an impedance of the second coil, the third capacitor and the fourth capacitor in view of the power processing unit exceeds a threshold.

7. The wireless power receiver of claim 3 , wherein the first coil and the second coil are formed on one printed circuit board (PCB), and the first coil is formed on an inside of the second coil.

8. The wireless power receiver of claim 7 , further comprising an antenna formed on the PCB.

9. The wireless power receiver of claim 1 , where the resonant reception unit and the inductive reception unit are connected in series.

10. The wireless power receiver of claim 9 , wherein the inductive reception unit comprises:
the first coil having a first end and a second end, with the first end being connected to the power processing unit;
the first capacitor with a first end connected to the second end of the first coil; and
a second capacitor having a first end and a second end, with the first end being connected to the first end of the first coil, and with the second end connected to the second end of the first capacitor; and
wherein the resonant reception unit comprises:
the second coil having a first end and a second end; and
the fourth capacitor having a first end and a second end, with the first end being connected to the first end of the second coil, and with the second end being connected to the second end of the second coil, the first end of the first coil, and the second end of the second capacitor.

11. The wireless power receiver of claim 10 , wherein the second capacitor, the fourth capacitor and the second coil constitute a resonant circuit.

12. The wireless power receiver of claim 10 , wherein at the second frequency, an impedance of the first coil and the first capacitor in view of the power processing unit exceeds a first threshold.

13. The wireless power receiver of claim 12 , wherein at the first frequency, an impedance of the second coil and the fourth capacitor in view of the power processing unit is less than a second threshold different from the first threshold.

14. The wireless power receiver of claim 1 , wherein the power processing unit comprises at least one of:
a rectifier configured to rectify wireless power in a form of an alternating current (AC) from at least one of the inductive reception unit and the resonant reception unit, into wireless power in a form of a direct current (DC);
a DC/DC converter configured to convert the wireless power rectified by the rectifier with a predetermined gain; and
a load configured to store the wireless power converted by the DC/DC converter.

15. The wireless power receiver of claim 1 , wherein the inductive reception unit is directly connected to the resonant reception unit.

16. A wireless power receiver for receiving wireless power, comprising:
a resonant circuit configured to receive wireless power by a resonance scheme at a second frequency;
a coil configured to receive wireless power by an induction scheme at a first frequency; and
a power processing unit configured to process wireless power received through the resonant circuit and the coil;
wherein when the wireless power is received by the induction scheme, a current flowing in the coil is greater than a current flowing in the resonant circuit, and when the wireless power is received by the resonance scheme, a current flowing in the resonant circuit is greater than a current flowing in the coil,
wherein the resonant circuit, the coil, and the power processing unit are connected in parallel.

17. A wireless power receiver comprising:
a power reception unit configured to receive wireless power of a first frequency by an induction scheme, and receive wireless power of a second frequency by a resonance scheme; and
a power processing unit configured to process the wireless power of the first frequency and the wireless power of the second frequency,
wherein the power reception unit comprises:
a shared capacitor used for both the induction scheme and the resonance scheme;
a first circuit configured to receive the wireless power of the first frequency by the induction scheme, with the shared capacitor; and
a second circuit configured to receive the wireless power of the second frequency by the resonance scheme, with the shared capacitor,
wherein the first circuit, the second circuit, and the power processing unit are connected in parallel.

18. The wireless power receiver of claim 17 , wherein at the second frequency, an impedance of the first

Assignees

• Samsung Electronics Co Ltd

Inventors

• Park Sung-Bum
• Kim Do-Won
• Ryu Young-Ho
• Kim Dong-Zo
• Park Jae-Hyun
• Song Keum-Su
• Yeo Sung-Ku

Classifications

• H02J50/12

  of the resonant type · CPC title

• H02J50/10 Primary

  using inductive coupling · CPC title

• H02J50/40

  using two or more transmitting or receiving devices (H02J50/50 takes precedence) · CPC title

• H02J50/402

  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 title