WIRELESS ENERGY TRANSFER FOR COMPUTER PERIPHERAL APPLICATIONS

• US 20120153732A1
• Filed: 11/05/2009
• Published: 06/21/2012
• Est. Priority Date: 09/27/2008
• Status: Active Grant

• Current Assignee: WiTricity Corporation
• Original Assignee: WiTricity Corporation
• Inventors: Kurs, Andre B., Karalis, Aristeidis, Kesler, Morris P., Campanella, Andrew J., Hall, Katherine L., Kulikowski, Konrad J., Li, Qiang, Soljacic, Marin
• Granted Patent: US 8,400,017 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 2200/18 Buses
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/20 AC to AC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2270/32 of electricity
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/124 Detection or removal of foreign bodies
• 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: B60L 53/51 Photovoltaic means
• CPC Class Codes: B60L 53/52 Wind-driven generators
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/64 Optimising energy costs, e.g. responding to electricity rates
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• 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 50/12 : of the resonant type
• CPC Class Codes: H02J 50/50 : using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/60 : responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/70 : involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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: H02J 7/35 : with light sensitive cells
• CPC Class Codes: H03H 7/40 : Automatic matching of load impedance to source impedance
• CPC Class Codes: H04B 5/79 : for data transfer in combination with power transfer
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 10/126 : the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

Described herein are improved configurations for wireless power transfer for computer peripherals, including a source magnetic resonator, integrated into a source station and connected to a power source and power and control circuitry; a device magnetic resonator, integrated into a computer peripheral; wherein power is transferred non-radiatively from the source magnetic resonator to the device magnetic resonator, and where the quality factors of the source and device resonators, Q_s and Q_d, satisfy the relationship, √{square root over (Q_sQ_d)}>100.

Claims

1. A wireless power transfer system for computer peripherals, comprising:

a source magnetic resonator, integrated into a source station and connected to a power source and power and control circuitry;

a device magnetic resonator, integrated into a computer peripheral;

wherein power is transferred non-radiatively from the source magnetic resonator to the device magnetic resonator, and the quality factors of the source and device resonators, Q_s and Q_d, satisfy the relationship, √

{square root over (Q_sQ_d)}>

100.

2. The system of claim 1, further comprising at least one additional device magnetic resonator, integrated into at least one additional computer peripheral.

3. The system of claim 2, further comprising at least one additional source magnetic resonator integrated into the source station and connected to the power and control circuitry.

4. The system of claim 3, wherein the at least one computer peripheral is powered directly by the energy transferred to its device magnetic resonator.

5. The system of claim 3, wherein the at least one computer peripheral includes at least one rechargeable battery that is charged by the wireless power transfer system.

6. The system of claim 3, wherein the at least one computer peripheral includes at least one energy storage unit that is energized by the wireless power transfer system.

7. The system of claim 3, wherein the at least one computer peripheral includes at least one super capacitor that is charged by the wireless power transfer system.

8. The system of claim 3, wherein at least one of the said magnetic resonators is a planar resonator comprising at least one electrical conductor wrapped around a core of magnetic material.

10. The system of claim 3, further comprising at least one passive magnetic resonator used to extend the distance of power transfer of the system.

11. The system of claim 6, wherein the said power transfer is configured to be active when the computer peripherals are not in use.

12. The system of claim 3, wherein at least one of the computer peripherals is a computer keyboard.

13. The system of claim 3, wherein at least one of the computer peripherals is a computer mouse.

14. The system of claim 3, wherein the source station is an all-in-one computer.

15. The system of claim 14, wherein the power source of the source power and control circuitry is powered from the USB port of the computer.

16. The system of claim 14, wherein the power source of the source power and control circuitry is powered from an internal connection in the computer.

17. The system of claim 6, wherein the said power transfer is configured to be active when the source station computer is inactive.

18. The system of claim 14, further comprising a wireless data communication link between the source and the computer peripherals, wherein power status and control information is transmitted through the said communication link.

19. The system of claim 14, further comprising a means for wireless configuration and monitoring of power levels and active times on the computer.

20. The system of claim 14, wherein the power and control circuitry is integrated into the said computer.

21. The system of claim 20, wherein the said source resonators are attached to the bottom portion of the computer monitor.

22. The system of claim 3, wherein the source station is a computer monitor.

9. The system of clam 3, further comprising at least one passive magnetic resonator used to enhance the power transfer of the system.