Arrangement for electromagnetic screening

Abstract

Arrangement for electromagnetically screening a connection (1) between an electrical conductor (2) and an electrical coupling element (3) connected to the conductor (2) is proposed. The conductor has an electrically effective screen (4) of a synthetic material containing carbon fibers. The coupling element (3) is also surrounded by an electrically effective screen (5) of a synthetic material containing carbon fibers, which is integrally connected with the screen (4) of the conductor (2) to form an overall shield.

Claims

1. Arrangement for electromagnetically screening a connection between an electrical conductor and an electrical coupling element connected to the conductor comprising: the conductor has a first electrically effective screen of a synthetic material containing carbon fibers; and wherein the coupling element is also surrounded by a second electrically effective screen of a synthetic material containing carbon fibers which is connected integrally to the first electrically effective screen of the conductor to form an overall shield, wherein the second electrically effective screen of the coupling element and the first electrically effective screen of the conductor are connected by means of an electrically conductive adhesive, said electrically conductive adhesive penetrating into matrix structures of carbons in said first and second electrically effective screens forming an overall screen.

2. Arrangement according to claim 1, wherein the overall shield is surrounded by a layer of insulating material.

3. Arrangement according to claim 1, wherein a line of the conductor is composed of aluminum or an aluminum alloy.

4. Arrangement according to claim 1, wherein the coupling element is a plug or a bushing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In accordance with a particularly preferred embodiment, the arrangement according to the invention is used in automobile construction, i.e. for electrically conductive connections within a motor vehicle.

DETAILED DESCRIPTION

(2) The arrangement according to the invention is explained with the aid of the drawing. FIG. 1 shows schematically an embodiment of an arrangement for electromagnetically screening a connection between an electrical conductor and an electrical coupling element.

(3) FIG. 1 shows schematically the end of an electrical conductor 2. The conductor 2 comprises a strand A which includes an electrical line and an insulation of synthetic material (not illustrated) which surrounds the electrical line. The electrical conductor may be constructed, for example, of copper or of aluminum or an aluminum alloy.

(4) An electrically effective screen 4 of carbon is mounted around the strand A. The carbon is present, for example, in the form of fibers or threads which can he formed by means of a known spinning machine as a non-woven fabric or as a stranded fabric around the insulation of the strand A. Carbon can also be wound as a prepared band around the strand A. Furthermore, the carbon can be pre-formed as a hose and subsequently pulled or pushed over the strand A.

(5) The conductor 2 is connected to a schematically illustrated coupling element 3. The schematically illustrated coupling element 3 is, for example, a plug or a bushing. In accordance with the invention, the housing 5 of the coupling element 3 is surrounded by an electrically effective screen 6 of carbon. This carbon screen 6 can, in a manner similar to the conductor 2, be mounted on the coupling element 3. The housing 5 of the coupling element 3 consists advantageously of an insulating synthetic material.

(6) Screen 6 of the coupling element 3 is integrally connected to the screen 4 of the conductor 2. Therefore, the two screens 4, 6 form an overall shield which gap-free surrounds the connection between conductor 2 and coupling element 3.

(7) In accordance with a particularly preferred embodiment of the invention, the integral connection of the screens 4, 6 of the conductor 2 and the coupling element 3 is achieved by a conductive adhesive. The adhesive is applied to the carbon fibers or fiber construction of both shields 4, 6, so that the shields are impregnated with adhesive 10. The two screens 4, 6 which have been impregnated in this manner by this adhesive are subsequently placed on each. other. For example, the screen 6 of the coupling element 3 may protrude slightly over the screen 4 of the conductor 2 and they may rest on each other, as illustrated in FIG. 1, at reference number 7. When adhesive 10 is cured, the integral connection between the two screens 4, 6 is created. Conductive adhesive 10 may be, for example, an epoxy resin or a polyester resin which is interspersed with conductive particles, for example, of nickel or of carbon.

(8) The connection 1 provided with the overall shield can additionally be surrounded by a layer 8 of insulating material. The layer 8 serves as a protection against accidental contact. It may be applied, for example, in a casting process. If the conductor 2 is a cable which is not normally current conductive, for example a grounding cable in a motor vehicle connected to the motor chassis, the insulating layer 8 can be omitted.

(9) Suitable materials for the insulation of the strand 2, the housing 5 of the coupling element 3 and the final closing layer 8 are, for example, polyethylene, polypropylene, polyvinylchloride and polyurethane.