Electric solenoid and use of an electric solenoid

Patent metadata

Field	Value
Publication number	US-2016336103-A1
Application number	US-201415106278-A
Country	US
Kind code	A1
Filing date	Dec 3, 2014
Priority date	Dec 19, 2013
Publication date	Nov 17, 2016
Grant date	—

Abstract

The invention relates to an electric solenoid ( 10 ) comprising at least one solenoid body ( 11 ) and a magnet wire ( 25; 25 a ) surrounding the solenoid body ( 11 ) in the form of at least one winding on a peripheral surface ( 16 ) of said solenoid body ( 11 ), the magnet wire ( 25; 25 a ) consisting of an electrically conductive wire core ( 23 ) and an insulation layer ( 26 ) which at least partially surrounds the wire core ( 23 ). According to the invention, the wire core ( 23 ) consists of aluminium ( 21 ) and graphene ( 22 ) which is in electrically conductive contact with the aluminium ( 21 ).

First claim

1 . An electric solenoid ( 10 ), comprising at least one solenoid body ( 11 ) and a coil wire ( 25 ; 25 a ) surrounding the solenoid body ( 11 ) on a peripheral surface ( 16 ) of the solenoid body ( 11 ) in the form of at least one winding, wherein the coil wire ( 25 ; 25 a ) consists of an electrically conductive wire core ( 23 ) and an insulating layer ( 26 ) surrounding the wire core ( 23 ) at least in regions,
characterized in that the wire core ( 23 ) comprises aluminum ( 21 ) and graphene ( 22 ) arranged in electrically conductive contact with the aluminum ( 21 ).

2 . The electric solenoid as claimed in claim 1 , characterized in that the graphene ( 22 ) is distributed in the aluminum ( 21 ) at least substantially homogenously in a cross section of the wire core ( 23 ) and is oriented in current conduction direction.

3 . The electric solenoid as claimed in claim 1 , characterized in that the graphene ( 22 ) is formed as a layer, which is separate from the aluminum ( 21 ), and is electrically conductively connected to the aluminum ( 21 ).

4 . The electric solenoid as claimed in claim 1 , characterized in that the insulation layer ( 26 ) is an aluminum oxide layer ( 27 ) having a thickness (a) between 1 μm and 10 μm.

5 . The electric solenoid as claimed in claim 3 , characterized in that the insulation layer ( 26 ) covers the graphene ( 22 ) only in part.

6 . The electric solenoid as claimed in claim 1 , characterized in that the coil wire ( 25 ; 25 a ) has an at least substantially rectangular cross section.

7 . The electric solenoid as claimed in claim 6 , characterized in that the coil wire ( 25 ; 25 a ) has a width (b) corresponding at least substantially to an axial width (B) of the solenoid body ( 11 ) in a longitudinal direction thereof.

8 . The electric solenoid as claimed in claim 6 , characterized in that the coil wire ( 25 ; 25 a ) has a width (b) corresponding at least substantially to 1/n times a width (B) of the solenoid body ( 11 ) in a longitudinal direction thereof, and in that two coil wires ( 25 ; 25 a ) adjacent to one another in the longitudinal direction of the solenoid body ( 11 ) are electrically conductively connected to one another.

9 . (canceled)

10 . (canceled)

11 . A motor vehicle injection component comprising an electric solenoid ( 10 ) as claimed in claim 1 .

12 . The motor vehicle injection component as claimed in claim 11 , wherein the component is a fuel injector.

13 . The electric solenoid as claimed in claim 1 , characterized in that the graphene ( 22 ) is formed as a layer, which is separate from the aluminum ( 21 ), is electrically conductively connected to the aluminum ( 21 ), and is continuous in a current direction.

14 . The electric solenoid as claimed in claim 1 , characterized in that the graphene ( 22 ) is formed as a layer, which is separate from the aluminum ( 21 ), is electrically conductively connected to the aluminum ( 21 ), and is continuous in a current direction on an upper side ( 29 ) of the wire core ( 23 ).

15 . The electric solenoid as claimed in claim 1 , characterized in that the insulation layer ( 26 ) is an aluminum oxide layer ( 27 ) having a thickness (a) between 2 μm and 5 μm.

Assignees

• Bosch Gmbh Robert

Inventors

• Giezendanner-Thoben Robert
• Stuke Bernd
• Koehne Martin

Classifications

• H01F5/00 Primary

  Coils (superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00) · CPC title

• H01F7/06 Primary

  Electromagnets; Actuators including electromagnets {(electric coils H01F5/00; devices for holding workpieces using electric force B23Q3/15; load-engaging elements for lifting articles electromagnetically B66C1/06; electromagnetic couplings F16D27/00; magnetic brakes F16D63/002; electromagnetically operated valves F16K11/24, F16K31/00; analysing materials by magnetic means G01N27/72, G01N27/80; electromagnets for winding mechanical clocks G04C1/02; electromagnetic relays H01H51/00; windings for salient poles of dynamo-electric machines H02K3/18; electromagnets for telegraphic communication H04L; for arc lamps H05B31/28)} · CPC title

• F02M51/061

  using electromagnetic operating means · CPC title

• H01F5/06

  Insulation of windings · CPC title

• H01F5/02

  wound on non-magnetic supports, e.g. formers · CPC title