SYSTEM PROVIDING INDUCTIVE TRANSMISSION OF POWER AND DATA THROUGH A PERMEABLE CONDUCTIVE BARRIER LAYER

• US 20140339914A1
• Filed: 11/21/2012
• Published: 11/20/2014
• Est. Priority Date: 11/21/2011
• Status: Active Grant

• Current Assignee: The Technology Partnership PLC (TTP Group Ltd.)
• Original Assignee: The Technology Partnership PLC (TTP Group Ltd.)
• Inventors: Pooley, David
• Granted Patent: US 10,177,608 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A wireless power transmission system is designed to transmit power through a permeable conductive barrier layer. The system comprises a power transmitting circuit including a first inductive coil. A power receiving circuit includes a second inductive coil located on the opposite side of the barrier layer to the first inductive coil. A biasing magnet or electromagnet is provided and characterised by its ability to substantially saturate the magnetisation of the barrier layer in a region adjacent to the first and second inductive coils.

Claims

1. A wireless power transmission system, designed to transmit power through a permeable conductive barrier layer, comprising:

a power transmitting circuit including a first inductive coil;

a power receiving circuit including a second inductive coil located on the opposite side of the barrier layer to the first inductive coil; and

a biasing magnet or electromagnet, arranged to substantially saturate the magnetisation of the barrier layer in a region adjacent to the first and second inductive coils.

2. A system according to claim 1, wherein the biasing magnet is a permanent magnet formed as a yoke around or through the first inductive coil.

3. A system according to claim 1, wherein the biasing magnet is an electromagnet and is provided with a DC bias current.

4. A system according to claim 1, wherein the first inductive coil and the biasing magnet are formed as a unitary component.

5. A system according to claim 1 wherein one or both of the first or second inductive coils are arranged also to operate as an electromagnetic acoustic transducer.

6. A system according to claim 1, further comprising an electromagnetic acoustic transducer coil associated with each of the first and second inductive coils.

7. A system according to any preceding claim 1 wherein the second inductive coil is connected to a circuit configured to operate as at least one of a sensor or RFID tag.