POWER RECEIVING APPARATUS AND WIRELESS POWER TRANSCEIVING SYSTEM

• US 20110234011A1
• Filed: 09/10/2010
• Published: 09/29/2011
• Est. Priority Date: 03/29/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: YANG, Joon-hyun, CHOI, Sung-jin, YI, Kang-hyun
• Granted Patent: US 8,716,899 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A wireless power transceiving system includes a power transmitting apparatus which converts power into a resonance wave and transmits the resonance wave, and a power receiving apparatus which receives the transmitted resonance wave, and converts the resonance wave into DC power using a parallel resonant rectifier circuit that is impedance matched with impedance generated in the power receiving apparatus by parasitic components at a frequency of the resonance wave.

Claims

1. A wireless power transceiving system, comprising:

a power transmitting apparatus which converts power into a resonance wave and transmits the resonance wave; and

a power receiving apparatus which receives the transmitted resonance wave, and converts the resonance wave into DC power, wherein the power receiving apparatus comprises a parallel resonant rectifier circuit that is impedance matched with impedance generated in the power receiving apparatus by parasitic components at a frequency of the resonance wave.

2. The wireless power transceiving system as claimed in claim 1, wherein the power receiving apparatus further comprises a reception resonator which receives the transmitted resonance wave, and

wherein the parallel resonant rectifier circuit converts the received resonant wave into DC power.

3. The wireless power transceiving system as claimed in claim 1, wherein the parallel resonant rectifier circuit comprises:

a first diode in which an anode is connected to a first terminal of the reception resonator and a cathode is connected to a first output node;

a second diode in which a cathode is connected to the first terminal of the reception resonator and an anode is connected to a second output node;

a first capacitive element which is connected to a second terminal of the reception resonator and to the first output node; and

a second capacitive element which is connected to the second terminal of the reception resonator and to the second output node.

4. The wireless power transceiving system as claimed in claim 3, wherein the power receiving apparatus further comprises:

a smoothing circuit which is connected in parallel to the first output node and the second output node.

5. The wireless power transceiving system as claimed in claim 4, wherein the power receiving apparatus further comprises:

an adjusting unit which adjusts capacitance values of the first capacitive element and the second capacitive element so that the impedance of the power receiving apparatus is adjusted according to a load of a load unit connected in parallel to the first output node and the second output node.

6. The wireless power transceiving system as claimed in claim 3, wherein each of the first capacitive element and the second capacitive element comprises at least one of a capacitor, a variable capacitor, and a circuit in which a plurality of variable capacitors, each of which connected in series to a corresponding switch element, are connected in parallel to one another.

7. The wireless power transceiving system as claimed in claim 1, wherein the power transmitting apparatus comprises:

a power unit which provides power; and

a transmission resonator which converts the provided power into the resonance wave and transmits the resonance wave to the power receiving apparatus.

8. A power receiving apparatus comprising:

a reception resonator which receives a resonance wave transmitted from an external source;

a parallel resonant rectifier circuit which converts the received resonance wave into DC power and is impedance matched with impedance generated in the power receiving apparatus by parasitic components at a frequency of the resonance wave; and

a load unit which consumes the DC power.

9. The power receiving apparatus as claimed in claim 8, wherein the parallel resonant rectifier circuit comprises:

a first diode in which an anode is connected to a first terminal of the reception resonator and a cathode is connected to a first output node;

a second diode in which a cathode is connected to the first terminal of the reception resonator and an anode is connected to a second output node;

a first capacitive element which is connected to a second terminal of the reception resonator and to the first output node; and

a second capacitive element which is connected to the second terminal of the reception resonator and to the second output node.

10. The power receiving apparatus as claimed in claim 9, further comprising:

a smoothing circuit which is connected in parallel to the first output node and the second output node.

11. The power receiving apparatus as claimed in claim 9, further comprising:

an adjusting unit which adjusts capacitance values of the first capacitive element and the second capacitive element so that the impedance of the power receiving apparatus is adjusted according to a load of the load unit.

12. The power receiving apparatus as claimed in claim 9, wherein each of the first capacitive element and the second capacitive element comprises at least one of a capacitor, a variable capacitor, and a circuit in which a plurality of variable capacitors, each of which connected in series to a corresponding switch element, are connected in parallel to one another.

13. The power receiving apparatus as claimed in claim 8, wherein the wireless power receiving apparatus comprises at least one of a remote controller and three-dimensional glasses which communicate wirelessly with a display apparatus.

14. An apparatus comprising:

a first device which converts electric power into a resonance wave and wirelessly transmits the resonance wave; and

a second device which receives the transmitted resonance wave and converts the resonance wave into DC power, wherein the second device is impedance matched with impedance generated in the second device by parasitic components at a frequency of the resonance wave.

15. The apparatus as claimed in claim 14, wherein the second device comprises:

a first diode having an anode is connected to a first terminal of the reception resonator and a cathode is connected to a first output node;

a second diode having a cathode is connected to the first terminal of the reception resonator and an anode is connected to a second output node;

a first capacitive element which is connected to a second terminal of the reception resonator and to the first output node;

a second capacitive element which is connected to the second terminal of the reception resonator and to the second output node,

wherein the first diode and the second diode generate the parasitic components at the frequency of the resonance wave, and

capacitive values of the first capacitive element and the second capacitive element are specified to counter the impedance generated in the second device by the parasitic components.

16. The apparatus as claimed in claim 15, wherein at least one of the first capacitive element and the second capacitive element comprises capacitors connected in parallel to one another and each connected in series to a corresponding switch element.

17. The apparatus as claimed in claim 16, wherein the second device further comprises:

an adjusting unit which adjusts the capacitance values of at least one of the first capacitive element and the second capacitive element by turning on and off the capacitors by closing and opening the corresponding switching elements to regulate the impedance of the second device.