Wireless power sources and devices

• US 10,340,745 B2
• Filed: 06/13/2017
• Issued: 07/02/2019
• 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.
• Primary Examiner(s): Amaya, Carlos D
• Application Number:
  US15/621,730
• Publication Number:
  US 20170288466A1
• Time in Patent Office: 749 Days
• Field of Search: 307104
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• 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 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: G06F 1/16 Constructional details or arrangements
• CPC Class Codes: H01F 2003/005 Magnetic cores for receiving several windings with perpendicular axes, e.g. for antennae or inductive power transfer
• 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 50/60 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04L 9/3278 using physically unclonable functions [PUF]
• CPC Class Codes: H04N 21/42222 Additional components integrated in the remote control device, e.g. timer, speaker, sensors for detecting position, direction or movement of the remote control, microphone or battery charging device
• CPC Class Codes: H04N 5/64 Constructional details of receivers, e.g. cabinets or dust covers furniture aspects of television cabinets A47B81/06
• 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 system for powering a television includes a source resonator, configured to generate an oscillating magnetic field, and at least one television component attached to at least one device resonator, wherein the at least one device resonator is configured to wirelessly receive power from the source resonator via the oscillating magnetic field when the distance between the source resonator and the at least one device resonator is more than 5 cm, and wherein at least one television component draws at least 10 Watts of power.

Claims

1. A wireless power system module, comprising:

a first inductive element configured to generate or receive an oscillating magnetic field;

a first capacitive element connected in series with a first terminal of the first inductive element;

a second capacitive element connected in series with a second terminal of the first inductive element;

a third capacitive element connected in parallel with the first and second capacitive elements and the first inductive element; and

a first reactance element connected in series with the first capacitive element,

wherein during operation, the first inductive element is configured to wirelessly transfer or receive power via the oscillating magnetic field.

2. The module of claim 1, wherein capacitance values of the first and second capacitive elements are nominally the same.

3. The module of claim 1, wherein the third capacitive element has an adjustable capacitance value.

4. The module of claim 1, wherein the first reactance element comprises a fourth capacitive element.

5. The module of claim 4, wherein the fourth capacitive element has an adjustable capacitance value.

6. The module of claim 1, wherein the first reactance element comprises a second inductive element.

7. The module of claim 6, wherein the second inductive element has an adjustable inductance value.

8. The module of claim 1, further comprising a second reactance element connected in series with the second capacitive element.

9. The module of claim 8, wherein the second reactance element comprises a fifth capacitive element.

10. The module of claim 9, wherein the fifth capacitive element has an adjustable capacitance value.

11. The module of claim 8, wherein the second reactance element comprises a third inductive element.

12. The module of claim 11, wherein the third inductive element has an adjustable inductance value.

13. The module of claim 8, wherein the first and second reactance elements comprise fourth and fifth capacitive elements, respectively, and wherein nominal capacitance values for each of the fourth and fifth capacitive elements are the same.

14. The module of claim 8, wherein the first and second reactance elements comprise second and third inductive elements, respectively, and wherein nominal inductance values for each of the second and third inductive elements are the same.

15. The module of claim 8, further comprising a first terminal connected to the first reactance element and a second terminal connected to the second reactance element, wherein the module is configured to connect to additional circuit elements through the first and second terminals.

16. The module of claim 15, wherein the module is configured to be driven by voltage signals of equal magnitude and opposite sign at the first and second terminals to generate an oscillating magnetic field and transfer power to a wireless power receiver.

17. The module of claim 15, wherein the module is configured to connect to a load through at least one of the first and second terminals.

18. The module of claim 15, wherein the module is configured to connect to a control circuit through at least one of the first and second terminals, and wherein the control circuit is configured to adjust at least one of a capacitance value and an inductance value of an element of the module to adjust an impedance seen by the first inductive element during operation.

19. The module of claim 18, wherein the control circuit is configured to adjust more than one adjustable capacitance value, adjustable inductance value, or adjustable capacitance values and adjustable inductance values of elements of the module.

20. The module of claim 8, wherein all points of the module are electrically symmetric about a virtual axis formed voltage nodes in the module.