Electrical connector system

• US 20100102915A1
• Filed: 02/06/2009
• Published: 04/29/2010
• Est. Priority Date: 10/29/2008
• Status: Active Grant

• Current Assignee: Wfs Technologies Ltd.
• Original Assignee: Wfs Technologies Ltd.
• Inventors: Hyland, Brendan, Rhodes, Mark, Ballantyne, Alexander
• Granted Patent: US 8,350,653 B2
• Time in Patent Office: Days
• US Class Current: 336/220
• CPC Class Codes: H01F 2038/143 for signals
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10

Abstract

The present invention relates to a connector system that provides the transfer of electrical power and/or data communications signals between two systems. The connector has no conductive electrical connection and can operate independently of angular orientation.

Claims

1. An electrical connector comprising a primary coil for magnetically coupling to a secondary coil, the primary coil being associated with a magnetic flux guide that is elongated in the plane of the coil to form at least one flux coupling wing and the secondary coil has a magnetic flux guiding structure that is elongated in the plane of the coil to form at least one flux coupling wings.

2. An electrical connector as claimed in claim 1 wherein, when connected, the primary and secondary coils are aligned about a common axis.

3. An electrical connector as claimed in claim 1 wherein the primary coil is provided in a first connector part and the secondary coil is provided in a second connector part.

4. A connector as claimed in claim 3 wherein one or more of the connector parts are rotatable relative to one another.

5. A connector as claimed in claim 3 wherein the parts are rotationally symmetric.

6. An electrical connector as claimed in claim 1 wherein the flux guiding structure is constructed from a material having a relative permeability greater than ten.

7. An electrical connector as claimed in claim 1 wherein the flux coupling wings length is greater than two times the flux guide material thickness.

8. An electrical connector as claimed in claim 1 wherein the flux coupling wings have a length that is less than fifty times the separation between the primary flux guide and the secondary flux guide at the mating surface, when in a connected position.

9. An electrical connector as claimed in claim 1 wherein the connector is ring-shaped and the cross sectional width of the connector is less than the inner radius dimension.

10. An electrical connector as claimed in claim 1 wherein a material with low coefficient of sliding kinetic friction is located on at least one of the mating surfaces.

11. An electrical connector as claimed in claim 1 wherein the flux guide material mating surfaces are adapted to be held in direct physical contact in use.

12. An electrical connector as claimed in claim 1 wherein multiple independent connection channels are implemented by separate concentric primary coils and corresponding secondary coils.

13. An electrical connector as claimed in claim 12 wherein multiple channels are constructed using separate flux guides spaced by a gap.

14. An electrical connector as claimed in claim 1 comprising a circular flux guide structure composed of at least two sections divided by a linking electrically insulated material.

15. An electrical connector as claimed in claim 1 wherein the flux guide is formed from sections that have a straight section in plan view.

16. An electrical connector as claimed in claim 1 wherein both connector components are mechanically designed to allow mating to any other like connector component.

17. An electrical connector as claimed in claim 1 wherein the volume enclosed by the flux guiding structure is filled with electrically insulating material in at least one position along its circumference.

18. An electrical connector as claimed in claim 1 wherein the volume enclosed by the flux guiding structure is filled with electrically insulating material continuously around its entire length.

19. An electrical connector as claimed in claim 1 wherein an optical communications connector or conductive slip ring connector are positioned at the centre of rotational symmetry.

20. An electrical connector as claimed in claim 1 wherein the turns ratio of primary to secondary coils implements a transformer function.

21. An electrical connector system that includes a connector as claimed in claim 1, the system being operable to allow electrical power and data transfer through a common connector channel.

22. An electrical connector system as claimed claim 21 wherein electrical power and data transfer are implemented using separate coupling coils in a multi-channel connector.

23. An electrical connector system as claimed in claim 22 wherein one connector half is disposed around a conical shaped guiding structure.

24. An electrical connector system as claimed in claim 23 wherein one connector half is disposed around a conical section of an underwater vehicle.

25. An electrical connector as claimed in claim 1 adapted to transmit power and communication/data signals, preferably in the form of power carrying and communication/data carrying waveforms.

26. An electrical connector as claimed in claim 25 wherein the power carrying and signal carrying waveforms are separated.

27. An electrical connector as claimed in claim 26 wherein the power carrying and signal carrying waveforms are separated in frequency.

28. An electrical connector as claimed in claim 27 wherein one or more frequency dependent filters are provided to prevent the power carrying waveform from impinging on transmit/receiver circuitry for the signal carrying waveform.

29. An electrical connector as claimed in claim 25 wherein the data/communications signal is modulated on the power waveform.

30. An electrical connector as claimed in claim 25 wherein the data/communication signal and power are transmitted in opposite directions.

31. An electrical connector as claimed in claim 1 adapted to transmit data/communication signals in two directions.

32. An electrical connector as claimed in claim 1 including a transmitter that includes a modulator and a receiver that includes a demodulator.

33. An electrical connector as claimed in claim 1 wherein each connector part has a mating structure for mating with the other part for mechanical alignment.

34. An electrical connector as claimed in claim 33 wherein the mating structure on each part is identical.

35. An electrical connector part for use in the connector of claim 1, the connector part comprising a coil and an associated magnetic flux guiding structure that is elongated in the plane of the coil to form at least one flux coupling wing.

36. An electrical connector part as claimed in claim 35 wherein the coil is a primary or secondary coil of a transformer.