ELECTRICAL BREAKDOWN PROTECTION FOR A CAPACITIVE WIRELESS POWERING SYSTEM

• US 20150263570A1
• Filed: 08/09/2013
• Published: 09/17/2015
• Est. Priority Date: 08/28/2012
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Van Goor, Dave Willem, Van Den Biggelaar, Theodorus Johannes Petrus, Yseboodt, Lennart, Willemsen, Oscar Hendrikus Hendrikus
• Granted Patent: US 10,186,903 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 21/04 comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/042; next to a bituminous or tarry layer B32B11/042; next to a water setting substance layer B32B13/10; next to a metal layer B32B15/10; next to a glass layer B32B17/062; next to a layer formed of natural mineral fibres or particles B32B19/042; next to a cellulosic plastic layer B32B23/044
• CPC Class Codes: B32B 2307/206 Insulating
• CPC Class Codes: B32B 2457/16 Capacitors
• CPC Class Codes: B32B 29/002 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10
• CPC Class Codes: B32B 5/00 Layered products characterised by the non- homogeneity or physical structure , i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
• CPC Class Codes: Y10T 428/24752 Laterally noncoextensive components
• CPC Class Codes: Y10T 428/2476 Fabric, cloth or textile component
• CPC Class Codes: Y10T 428/24769 Cellulosic

Abstract

An article of manufacture (130) for protecting a capacitive power transfer system (100) from electrical breakdowns is disclosed. The article of manufacture comprises a non-conductive layer (210) made of a first type of non-conductive material, and a protection layer (220) made of a second type of non-conductive material, wherein a breakdown voltage of the second type of non-conductive material is higher than a breakdown voltage of the first type of non-conductive material, wherein the protection layer covers only a portion of the non-conductive layer, where in the non-conductive layer and the protection layer form an insulating layer (130) of the capacitive power transfer system.

Claims

1. An insulating layer for protecting a capacitive power transfer system from electrical breakdowns, comprising:

a non-conductive layer made of a first type of non-conductive material; and

a protection layer made of a second type of non-conductive material, wherein a breakdown voltage of the second type of non-conductive material is higher than a breakdown voltage of the first type of non-conductive material, wherein the protection layer covers only a portion of the non-conductive layer, wherein the non-conductive layer and the protection layer form the insulating layer of the capacitive power transfer system.

2. The insulating layer of claim 1, wherein a dielectric permittivity value of the second type of non-conductive material is higher than a dielectric permittivity value of the first type of non-conductive material.

3. The insulating layer of claim 1, wherein the second type of non-conductive material is any one of:

plastic, Mica Kapton, Metal Oxide, Silicon Oxide, and Aluminum Oxide.

4. The insulating layer of claim 1, wherein the first type of non-conductive material is any one of paper, wood, textile, glass, DI-water, and non-conductive paint.

5. The insulating layer of claim 1, wherein the second type of material is applied on one side of a pair of receiver electrodes of the capacitive power transfer system.

6. The insulating layer of claim 1, wherein the non-conductive layer is applied on an infrastructure of the capacitive power transfer system and the protection layer is applied on at least one portion of the non-conductive layer.

7. The insulating layer of claim 6, wherein the at least one portion is where capacitive coupling between a receiver and a transmitter of the capacitive power transfer system is formed.

8. The insulating layer of claim 1, wherein the insulating layer allows formation of a capacitive impedance between a pair of transmitter electrodes and a pair of receiver electrodes of the capacitive power transfer system.

9. The insulating layer of claim 8, wherein a power signal generated by a power driver is wirelessly transferred from the pair of transmitter electrodes, coupled to the insulating layer, to the pair of receiver electrodes connected to a load and an inductor in order to power the load when a frequency of the power signal substantially matches a series-resonance frequency of the inductor and the capacitive impedance.

10. A receiver used for a capacitive power transfer system designed to protect from electrical breakdowns in a capacitive power transfer system, comprising:

a pair of electrodes made of a conductive material;

a non-conductive layer made of a first type of non-conductive material that covers one side of the pair of electrodes with respect to the extending plane of the pair of electrodes; and

a protection layer made of a second type of non-conductive material that covers the other side of the pair of electrodes with respect to the extending plane of the pair of electrodes, wherein a breakdown voltage of the second type of non-conductive material is higher than a breakdown voltage of the first type of non-conductive material, wherein the non-conductive layer and the protection layer form an insulating layer of the capacitive power transfer system.

11. The receiver of claim 10, wherein a dielectric permittivity value of the second type of non-conductive material is higher than a dielectric permittivity value of the first type of non-conductive material.

12. The receiver of claim 10, wherein the second type of non-conductive material is any one of:

plastic, Mica, Kapton, Metal Oxide, Silicon Oxide, and Aluminum Oxide.

13. The receiver of claim 10, wherein the first type of non-conductive material is any one of paper, wood, textile, glass, DI-water, and non-conductive paint.

14. A capacitive powering system, comprising:

a pair of receiver electrodes connected to a load through an inductor, wherein the inductor is coupled to the load to resonate the system;

a pair of transmitter electrodes connected to a driver; and

an insulating layer including a non-conductive layer made of a first type of non-conductive material, and a protection layer made of a second type of non-conductive material, wherein a breakdown voltage of the second type of non-conductive material is higher than a breakdown voltage of the first type of non-conductive material, the protection layer covers a portion of the non-conductive layer, wherein the pair of transmitter electrodes and the pair of receiver electrodes are located on opposite sides of the insulating layer, such that a capacitive impedance is formed between the pair of transmitter electrodes and the pair of receiver electrodes, wherein a power signal generated by the driver is wirelessly transferred from the pair of transmitter electrodes to the pair of receiver electrodes without causing electrical breakdowns in the system when a frequency of the power signal matches a series-resonance frequency of the first inductor and the capacitive impedance.