Device for the inductive transmission of electrical power

• US 7,019,620 B2
• Filed: 06/19/2002
• Issued: 03/28/2006
• Est. Priority Date: 07/04/2001
• Status: Expired due to Fees

• Current Assignee: Conductix-Wampfler GmbH (Delachaux Group SA)
• Original Assignee: Wampfler Aktiengesellschaft (Delachaux Group SA)
• Inventors: Mecke, Rudolf, Bohler, Frank, Winterhalter, Roland, Wechlin, Mathias
• Primary Examiner(s): MULLEN, THOMAS J
• Application Number:
  US10/480,812
• Publication Number:
  US 20040183640A1
• Time in Patent Office: 1,378 Days
• Field of Search: 340/310.07, 340/310.01, 340/310.17, 340/310.11, 336/180, 336/182, 336/183
• US Class Current: 340/12.38
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

The invention relates to a device for the inductive transmission of electrical power, comprising a power line which is situated on the primary side of said device and which consists of two wires which are guided in a parallel manner relative to each other. Power can be drawn from line by at least one mobile consumer, which is situated on the secondary side, by means of inductive coupling. Said device is provided with a data line which is situated on the primary side for the additional inductive transmission of data to and/or from the consumer. Said data line consists of two wires which are guided in a parallel manner relative to each other. Each of the data line wires is arranged adjacent to one of the two power line wires and in a manner that is symmetrical to a plane. The cross section of the conductor of the adjacent wire of the energy line is also symmetrical relative to the plane. The inductive coupling between the power line and the data line can be thus kept very low, and simultaneously enables the inductor, which is to be provided on the secondary side for the magnetic coupling with the data line, to be integrated into or mounted on the energy-transmitting consumer. The data line can be fixed to the power line or both lines can be integrated therewith in a common cable.

Claims

1. A device for inductive transmission of electric energy, provided with a primary side power line comprising two wires deployed parallel to each other, wherein the power can be drawn by at least one mobile pick-up on a secondary side by means of inductive coupling along its energy path, wherein a data line, comprising two wires, deployed in parallel to each other on the primary side, is provided for additional inductive transmission of data to or from the pick-up, and wherein both wires of the data line are arranged adjacent to one of the wires of the power line and wherein they are deployed further away from the other wire of the power line, and wherein they are arranged symmetrically to a plane, to which the profile of the conductor of the adjacent wire of the power line is also symmetrical.

2. The device according to claim 1, wherein the data line displays the same type of symmetry with respect to the more distant wire of the power line as with respect to the adjacent wire.

3. The device according to claim 2, wherein—

the data line is arranged on the side of the adjacent wire of the power line which is turned away from the other wire.

4. The device according to claim 1 , wherein the data line is arranged in the space between the adjacent wire of the power line and the space in which the pick-up is moving on the secondary side.

5. The device according to claim 1, wherein the data line is attached to the power line.

6. The device according to claim 5, wherein the attachment of the data line to the power line is secured with a plurality of connecting members, which are arranged along both lines and locked by these lines.

7. The device according to claim 1, wherein the data line is integrated together with the power line in a joint cable.

8. The device according to claim 1, wherein inductance is provided in or on the secondary side pick-up, which is magnetically coupled with the data line.

9. The device according to claim 8, wherein the inductance that is magnetically coupled with the data line is arranged in such a way in or on the pick-up, so that in the operating position of the pick-up the inductance is maintained in the same type of symmetry as the data line to that wire of the power line to which the data line is adjacent.

10. The device according to claim 8, wherein at least one transmission device and at least one reception device are provided in at least one location along the data line on the primary side or at an end of the same line, and in or on the pick-up on the secondary side, between which information signals can be transmitted through the data line and the inductance is magnetically coupled therewith.

11. The device according to claim 10, wherein combined transmission and reception devices are provided both along the date line and in or on the pick-up, enabling a bidirectional communication through the data line.

12. A device according to claim 1, wherein a data line is deployed adjacent to each of the two wires of the power line.

13. The device according to claim 12, wherein each data line is associated with corresponding transmission and reception devices along the data line and in or on the pick-up, creating together communication in the full duplex mode.

14. A cable for the primary conductor loop of a device for inductive transmission of electrical power at least to one mobile pick-up, having a conductor that is provided with an approximately symmetrical profile and surrounded by insulation, wherein for the purposes of simultaneous transfer of data to and/or from the pick-up, two other conductors having a significantly smaller profile are arranged parallel to the first conductor and symmetrically to plane of symmetry of its profile;

and wherein the other conductors are also surrounded by insulation and tightly attached to the first conductor, and wherein the angular position of the two other conductors with respect to the first conductor is visible from outside by the form of the cable and/or by a marking.

15. The cable according to claim 14, wherein the two other conductors can be separated together with their respective insulations from the first conductor without destroying the insulation.

16. The cable according to claim 14, wherein the insulations of the two other conductors are constructed as one piece with the insulation of the first conductor and connected with this insulation by means of predetermined breaking points.

17. The cable according to claim 14, wherein the two other conductors are parts of an insulated flat cables, which is separate from the first conductor and insulation of the first conductor, and which is adjacent to the insulation of the first conductor and held in a fixed position with respect to it by a common jacket.

18. The cable according to claim 17, wherein the common jacket, which is attached additionally, is made from a textile or textile-reinforced product.