WIRELESS POWER TRANSMISSION FOR PORTABLE WIRELESS POWER CHARGING

• US 20110227530A1
• Filed: 05/26/2011
• Published: 09/22/2011
• Est. Priority Date: 07/12/2005
• Status: Abandoned Application

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: MOFFATT, ROBERT, KARALIS, ARISTEIDIS, KURS, ANDRE B., FISHER, PETER H., JOANNOPOULOS, JOHN D., SOLJACIC, MARIN
• Application Number:
  US13/116,474
• Publication Number:
  US 20110227530A1
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: B60L 2210/20 AC to AC converters
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 9/04 Resonant antennas
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• 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 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor

Abstract

Described herein are embodiments of a portable wireless power charger that includes a charging region including a high-Q source magnetic resonator configured to generate a magnetic near-field for coupling of wireless power to a wireless powered device including a high-Q receiver magnetic resonator, the high-Q source magnetic resonator substantially disposed around a perimeter of the charging region, and a cable for feeding input power to the high-Q source magnetic resonator.

Claims

1. A portable wireless power charger, comprising:

a charging region including a high-Q source magnetic resonator configured to generate a magnetic near-field for coupling of wireless power to a wireless powered device including a high-Q receiver magnetic resonator, the high-Q source magnetic resonator substantially disposed around a perimeter of the charging region; and

a cable for feeding input power to the high-Q source magnetic resonator.

2. The portable wireless power charger of claim 1, wherein the high-Q source magnetic resonator is configured to generate the magnetic near-field for coupling to a wireless power receiver.

3. The portable wireless power charger of claim 2, further comprising transmit circuitry configured to drive the high-Q source magnetic resonator and separated from the charging region by the cable, the cable configured to couple a resonant frequency signal between the transmit circuitry and the a high-Q source magnetic resonator.

4. The portable wireless power charger of claim 1, wherein the high-Q source magnetic resonator comprises at least one capacitively loaded conducting loop.

5. The portable wireless power charger of claim 4, further comprising a high-Q source magnetic resonator, configured to generate a magnetic near-field between the high-Q source magnetic resonator and at least one other capacitively loaded conducting loop for transmission of wireless power from the high-Q source magnetic resonator to the at least one other capacitively loaded conducting loop.

6. The portable wireless power charger of claim 5, wherein the high-Q source magnetic resonator is located to cause the at least one other capacitively loaded conducting loop to resonate in response to a near-field generated around the high-Q source magnetic resonator.

7. The portable wireless power charger of claim 5, further comprising circuitry configured to drive the high-Q source magnetic resonator and separated from the charging region by a cable.

8. The portable wireless power charger of claim 1, wherein the high-Q source magnetic resonator is configured to resonate at one of a substantially unmodulated radio frequency (RF).

9. The portable wireless power charger of claim 8, wherein the substantially unmodulated RF frequency comprises one of a first frequency band between 119 kHz to 135 kHz, a second frequency band between 6.765 MHz to 6.795 MHz, and a third frequency band between 13.553 MHz to 13.567 MHz.

10. The portable wireless power charger of claim 8, wherein the substantially unmodulated RF frequency is within one of the frequency bands specially assigned for industrial, scientific and medical (ISM) equipment.

11. The portable wireless power charger of claim 1, wherein the input power is separated from the charging region by the cable.

12. The portable wireless power charger of claim 1, wherein the charging region comprises a wireless powered computer mouse.

13. The portable wireless power charger of claim 1, wherein the charging region comprises a wireless powered/rechargeable item.

14. A wireless power transmission system, comprising:

a portable wireless power charger comprising;

a charging region including a high-Q source magnetic resonator configured to generate a magnetic near-field, the high-Q source magnetic resonator substantially disposed around a perimeter of the charging region; and

a cable for feeding input power to the high-Q source magnetic resonator; and

a wireless powered device comprising a receiver including a high-Q receiver magnetic resonator, the high-Q receiver magnetic resonator formed substantially about a physical interface of the wireless powered device with the charging region.

15. A method for transmitting wireless power, comprising:

coupling a resonant frequency signal over a cable; and

generating a magnetic near-field about a charging region including a high-Q source magnetic resonator for coupling of wireless power to a wireless powered device comprising a high-Q receiver magnetic resonator in response to the resonant frequency signal received over the cable.

16. The method for transmitting wireless power of claim 15, wherein generating a magnetic near-field comprises generating a magnetic near-field from a high-Q source magnetic resonator responsive to the resonant frequency signal.

17. The method for transmitting wireless power of claim 15, wherein generating a magnetic near-field comprises generating a magnetic near-field from a capacitively loaded conducting loop separately excited by a high-Q source magnetic resonator responsive to the resonant frequency signal.

18. A portable wireless power charger, comprising:

means for coupling a resonant frequency signal over a cable; and

means for generating a magnetic near-field about a charging region including a high-Q source magnetic resonator for coupling of wireless power to a wireless powered device including a high-Q receiver magnetic resonator in response to the resonant frequency signal received over the cable.

19. The portable wireless power charger of claim 18, wherein the means for generating a magnetic near-field comprises means for generating a magnetic near-field from a high-Q source magnetic resonator responsive to the resonant frequency signal.

20. The portable wireless power charger of claim 18, wherein the means for generating a magnetic near-field comprises means for generating a magnetic near-field from a capacitively loaded conducting loop separately excited by a high-Q source magnetic resonator responsive to the resonant frequency signal.