Receiver electrodes of a capacitive wireless powering system

• US 9,847,665 B2
• Filed: 08/06/2012
• Issued: 12/19/2017
• Est. Priority Date: 08/16/2011
• Status: Expired due to Fees

• Current Assignee: Philips Lighting BV (Koninklijke Philips N.V.)
• Original Assignee: Philips Lighting BV (Koninklijke Philips N.V.)
• Inventors: Waffenschmidt, Eberhard, Liedenbaum, Coen Theodorus Hurbertus Fransiscus, Sempel, Adrianus, Willemsen, Oscar Hendrikus, Van Goor, Dave Willem, Van Der Zanden, Henricus Theodorus, Van Den Biggelaar, Theodorus Johannes Petrus, Bergman, Anthonie Hendrik
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Parries, Dru
• Application Number:
  US14/237,908
• Publication Number:
  US 20140203663A1
• Time in Patent Office: 1,961 Days
• Field of Search: 307109, 307104
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H04B 5/22 Capacitive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Various receiver electrodes for supplying power to a load connected in a capacitive power transfer system are disclosed. In one embodiment, the receiver electrodes include a first conductive plate (212) connected to a first sphere-shaped hinge (211), wherein the first sphere-shaped hinge is coupled to a first receiver electrode (210); and a second conductive plate (222) connected to a second sphere-shaped hinge (221), wherein the second sphere-shaped hinge is coupled to a second receiver electrode (220), the second receiver electrode being connected to an inductor of the capacitive power transfer system and the first receiver electrode being connected to the load, the inductor being connected to the load to resonate the capacitive power transfer system.

Claims

1. An article of manufacture for supplying a power to a load connected in a capacitive power transfer system, comprising:

a flexible pocket having a flexible surface;

a first receiver electrode being fixed directly to the flexible surface of the flexible pocket and connected to the load; and

a second receiver electrode being fixed directly to the flexible surface of the flexible pocket, such that the relative orientation of the first receiver electrode and second receiver electrode, with respect to each other, is adjustable, and connected in series to an inductor of the capacitive power transfer system, wherein the inductor is connected in series to the load and configured to resonate at a series-resonance frequency of the capacitive power transfer system.

2. The article of manufacture of claim 1, wherein a power signal generated by a power driver is wirelessly transferred from a pair of transmitter electrodes coupled to an insulating layer to the first and second receiver electrodes to wirelessly power the load when a frequency of the power signal substantially matches a series-resonance frequency of the inductor and the capacitive impedance formed between the pair of transmitter electrodes and the receiver electrodes when the flexible pocket is pressed against the insulating layer, wherein each of the pair of transmitter electrodes and the insulating layer has a curved shape.

3. The article of manufacture of claim 2, wherein each of the first and second receiver electrodes substantially overlaps the surface of a transmitter electrode of the pair of transmitter electrodes, such that fluctuations in the capacitance impedance are reduced.

4. The article of manufacture of claim 1, wherein the flexible pocket is a flexible container configured to seal a gas volume or liquid volume, wherein the flexible container is made of a non-conductive material.

5. The article of manufacture of claim 1, wherein the first and second receiver electrodes are adhered to an outside of the flexible pocket.

6. The article of manufacture of claim 1, wherein the first and second receiver electrodes are adhered to an inside of the flexible pocket.

7. The article of manufacture of claim 2, wherein the flexible pocket further includes a fixing means to secure the flexible pocket to the surface of the insulating layer, wherein the fixing means include any one of:

a permanent magnet, a suction cap, and a glue layer.

8. An article of manufacture for supplying a power to a load connected in a capacitive power transfer system, comprising:

a flexible pocket;

a first receiver electrode connected to the flexible pocket and connected to the load; and

a second receiver electrode connected to the flexible pocket, and connected in series to an inductor of the capacitive power transfer system, wherein the inductor is connected in series to the load and configured to resonate at a series-resonance frequency of the capacitive power transfer system, wherein the flexible pocket is a flexible container configured to seal a gas volume or liquid volume, wherein the flexible container is made of a non-conductive material.

9. The article of manufacture of claim 8, wherein a power signal generated by a power driver is wirelessly transferred from a pair of transmitter electrodes coupled to an insulating layer to the first and second receiver electrodes to wirelessly power the load when a frequency of the power signal substantially matches a series-resonance frequency of the inductor and the capacitive impedance formed between the pair of transmitter electrodes and the receiver electrodes when the flexible pocket is pressed against the insulating layer, wherein each of the pair of transmitter electrodes and the insulating layer has a curved shape.

10. The article of manufacture of claim 9, wherein each of the first and second receiver electrodes substantially overlaps the surface of a transmitter electrode of the pair of transmitter electrodes, such that fluctuations in the capacitance impedance are reduced.

11. The article of manufacture of claim 8, wherein the first and second receiver electrodes are adhered to an outside of the flexible pocket.

12. The article of manufacture of claim 8, wherein the first and second receiver electrodes are adhered to an inside of the flexible pocket.