WIRELESS POWER RECEIVER DEVICE, WIRELESS POWER TRANSMITTER DEVICE, AND WIRELSS POWER TRANSCEIVER DEVICE

• US 20150222130A1
• Filed: 02/26/2015
• Published: 08/06/2015
• Est. Priority Date: 10/17/2012
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: IEKI, Tsutomu, GOMA, Shinji, KATO, Kazuya
• Granted Patent: US 10,033,217 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 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 Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection

Abstract

A wireless power receiver device includes a sheet-like electrode sheet section and a power receiver section. The electrode sheet section includes a power receiver side active electrode and a power receiver side passive electrode that are substantially coplanar and formed into sheet-like shapes; lead lines that are coplanar with both the electrodes, extended from the respective electrodes, and formed into sheet-like shapes; and an insulation sheet that covers both the electrodes and both the lead lines from both sides thereof. The power receiver section includes a step-down unit that steps down an alternating-current voltage induced between end portions of the lead lines; a power receiver module that rectifies and smoothes the alternating-current voltage that is stepped down by the step-down unit; and a connector for outputting an output voltage of the power receiver module.

Claims

1. A wireless power receiver device, comprising:

an electrode sheet including;

an active electrode and a passive electrode that are substantially coplanar,

a pair of lead lines that are coplanar with the active and passive electrodes and extend therefrom, respectively, and

an insulation sheet that covers both sides of the active and passive electrodes and the pair of lead lines; and

a power receiver including;

a step-down unit configured to step down an alternating-current voltage induced between the pair of lead lines,

a rectifying-and-smoothing circuit unit that rectifies and smoothes the alternating-current voltage stepped down by the step-down unit, and

a connector configured to output an output voltage of the rectifying-and-smoothing circuit.

2. The wireless power receiver device according to claim 1, wherein the insulation sheet comprises a first insulation sheet that covers a first side of the active and passive electrodes and the pair of lead lines and a second insulation sheet that covers a second side of both the active and passive electrodes and the pair of lead lines.

3. The wireless power receiver device according to claim 2, wherein the first insulation sheet is thicker than the second insulation sheet and is disposed adjacent to an electronic device when the electrode sheet is attached to the electronic device.

4. The wireless power receiver device according to claim 1, wherein the electrode sheet further comprises a planar shield disposed on a principle surface of the insulation sheet, and another insulation sheet is disposed on the shield electrode on a side thereof that is opposite to the insulation sheet.

5. The wireless power receiver device according to claim 1, wherein the electrode sheet and the power receiver are separable.

6. The wireless power receiver device according to claim 5, wherein the power receiver comprise a pair of spring connectors coupled to input wiring of the step-down unit and configured to attach to the pair of lead lines, respectively.

7. The wireless power receiver device according to claim 1, wherein the insulation sheet further comprises an adhesion layer disposed on a surface thereof.

8. The wireless power receiver device according to claim 1, wherein the step-down unit is a transformer.

9. A wireless power transmitter device, comprising:

an electrode sheet section including;

an active electrode and a passive electrode that are substantially coplanar,

a pair of lead lines that are coplanar with the active and passive electrodes and extend therefrom, respectively, and

an insulation sheet that covers both sides of the active and passive electrodes and the pair of lead lines; and

the power transmitter including;

an inverter configured to convert a direct-current voltage to an alternating-current voltage having a predetermined frequency, and

a step-up unit configured to step up the alternating-current voltage output from the inverter unit and apply the stepped up alternating-current voltage to the pair of lead lines.

10. The wireless power transmitter device according to claim 9, wherein the electrode sheet and the power transmitter are separable.

11. The wireless power transmitter device according to claim 9, wherein the insulation sheet comprises an adhesion layer disposed on a surface thereof.

12. The wireless power transmitter device according to claim 9, wherein the step-up unit is a transformer.

13. The wireless power transmitter according to claim 9, wherein the power transmitter further comprises:

an AC/DC converter coupling a power supply to the inverter; and

a protection circuit configured to disconnect a the inverter from the AC/DC converter in response to an overcurrent or an overvoltage.

14. A wireless power transceiver device, comprising:

an electrode sheet section including;

an active electrode and a passive electrode that are substantially coplanar,

a pair of lead lines that are coplanar with the active and passive electrodes and extend therefrom, respectively, and

an insulation sheet that covers both sides of the active and passive electrodes and the pair of lead lines;

a power receiver including;

a step-down unit configured to step down an alternating-current voltage induced between the pair of lead lines,

a rectifying-and-smoothing circuit that rectifies and smoothes the alternating-current voltage stepped down by the step-down unit, and

a connector configured to output an output voltage of the rectifying-and-smoothing circuit;

a power transmitter including;

an inverter configured to convert a direct-current voltage to an alternating-current voltage having a predetermined frequency, and

a step-up unit configured to step up the alternating-current voltage output from the inverter unit and apply the stepped up alternating-current voltage to the pair of lead lines; and

a selector configured to alternatively connect the pair of lead lines to an output of the step-up unit and an input of the step-down unit.

15. The wireless power transceiver device according to claim 14, wherein the electrode sheet is separable from the power receiver, the power transmitter, and the selector.

16. The wireless power transceiver device according to claim 14, wherein the power transmitter further comprises:

an AC/DC converter coupling a power supply to the inverter; and

a protection circuit configured to disconnect a the inverter from the AC/DC converter in response to an overcurrent or an overvoltage.

17. A wireless power transceiver device, comprising:

an electrode sheet including;

an active electrode and a passive electrode that are substantially coplanar,

a pair of lead lines that are coplanar with the active and passive electrodes and extend therefrom, respectively, and

an insulation sheet that covers both sides of the active and passive electrodes and the pair of lead lines;

a transformer connected to end portions of the pair of lead lines at a high voltage side thereof;

a power receiver including;

a rectifying-and-smoothing circuit that rectifies and smoothes an alternating-current voltage stepped down by the transformer;

a connector configured to output an output voltage of the rectifying-and-smoothing circuit,

a power transmitter including;

an inverter configured to convert a direct-current voltage to an alternating-current voltage having a predetermined frequency; and

a selector configured to selectively connect a low voltage side of the transformer to either an output of the inverter or to an input of the rectifying-and-smoothing circuit.

18. The wireless power transceiver device according to claim 17, wherein the electrode sheet is separable from the power receiver, the power transmitter, the selector, and the transformer.

19. The wireless power transceiver device according to claim 17, wherein the power transmitter further comprises:

an AC/DC converter coupling a power supply to the inverter; and

a protection circuit configured to disconnect a the inverter from the AC/DC converter in response to an overcurrent or an overvoltage.