DE1919611U - Wound capacitor for radio interference suppression in motor vehicles. - Google Patents

Description

RA. 241925 * 5/12/65

Attachment to

Utility model registration

Beru-Werk Albert Huprecht, Ludwigsburg, Wernerstrasse 35

Winding capacitor for radio interference suppression in motor vehicles

The innovation relates to wound capacitors for the dissipation of radio interference voltages in the electrical system of Kraft « Vehicles that control e.g. on the alternator, on contact regulators, on the ignition coil or other power consumers develop.

At present, different types of capacitors are used, which are not limited to their electrical properties Structure but mainly with regard to the formation of the connection.

Mainly cup capacitors are used, the ever According to the interference suppression conditions with one connection (parallel capacitor) or with two connections (Yorbe loop capacitor) are trained. Both types of construction have in common that the mechanical fastening of the closing elements by means of special components, such as insulating disks or the like is the supporting component of the capacitor.

These insulating washers must be used for every connection system (e.g. screw connection, Flaehsteek or round plug connection) be designed differently, so that not only a large stock attitude due to the large number of models required is required, but also the production due to the often necessary conversion to the individual Types is disturbed.

I / W. ./. 2

According to the innovation, the disadvantages mentioned are thereby avoided that as a supporting component of the capacitor an insulating rod arranged centrally in the capacitor winding or an insulating tube is provided with connection elements anchored therein on both sides, and that the cable respectively. the ground connection either directly on the contacting means applied to the end faces of the capacitor winding take place or at a short distance therefrom, for example on shoulder pieces serving as a support surface, which are electrically conductively connected to the contacting means

3 Since the cable connection is practically directly on the end face of the capacitor winding, it is therefore extremely Low-inductance connection possible with just one connection element. Such a suppression capacitor can therefore both can be switched as a parallel capacitor as well as a loop-by capacitor.

The innovation is shown schematically in the drawing.

Pig.l shows an embodiment on an enlarged scale of the wound capacitor in longitudinal section,

Pig. 2 shows the plan view of a wound capacitor with a wound capacitor arranged directly on the end face of the capacitor winding Connection,

Pig. 3, 4 and 5 show a respectively on the winding capacitor of Pig.l. 2 screw-on double connectors in the Front view, top view and side view.

In the example of the Pig. 1, the connecting elements A and A 'are anchored on both sides in the insulating rod 1 by means of their pins 2 and 2'. The insulating rod 1 can consist of polyamide, for example, and the anchoring of the connecting elements A and A 'can be accomplished ^{by overmolding the pins 2 and 2 f.} As indicated by the dash-dotted lines 3, the insulating rod 1 could also be used

a ßohr filled with cast resin can be provided, into which the connecting elements A and A ¹ with their pins 2 and 2 ^{1 are} glued.

In both of the examples mentioned, one is made before Unit assumed, its rod-shaped, insulating The middle part is the supporting component for the connection elements A and A 'and the capacitor winding B. Finally, the insulating rod 1 can also be made of cast resin which is cast directly into the capacitor winding B and cured be educated.

At the front ends of the insulating rod 1, the pin 2 respectively. 2 'of the connection element A respectively. A ¹ in the shoulder piece 4 or 4 ¹ and then in the screw bolts 5 or. 5 'over, on which the fastening nut 6 respectively. 6 'is screwed on. To the insulating rod 1 around the capacitor winding B is arranged, on the linings 7 and 7 ¹ face the contacting means 8 and respectively. 8 'are applied, respectively with the shoulder pieces 4. 4 ^{1 of} the connection elements A, A ', are connected in an electrically conductive manner.

The capacitor winding is made of known materials, such as metallized plastic films and according to known Ver drive wound and contacted on the front side. It is enclosed by a plastic sleeve 9, which extends at the front to about the same height as the shoulder pieces 4 and 4 ^f , and the spaces in between are ^{filled with potting compound 10.10 1} ^, for example, epoxy resin. Instead of the shoulder pieces 4 »4 ', nuts 11 screwed onto the screw bolts 5, 5' can also be provided, for example ring nuts with slots, as shown in Pig. 2, or hexagon nuts. The use of nuts also offers the possibility of making the cable connection, which is implemented, for example, with a cable lug 12, directly on the contacting means 8.

To avoid loosening the ground connection, which occurs e.g. on sheet metal wall 13, see below a resilient securing element 14 of the fastening nut 6 ′.

If the fastening nut 6 'is to be saved, the screw bolt 5' can also be designed as a self-tapping screw. The connection element A ¹ is used in 'these cases at the same time to fasten the capacitor, so that the previously usual fastening elements such as clamps, brackets or the like. In addition to the required screw connections are unnecessary.

The connection of the capacitor to the line to be suppressed can be done by means of a dash-dotted line in Fig.l Jaw clamp 16 take place.

If the interference suppression capacitor is to be connected as a parallel capacitor, a simple, with the to be suppressed equipment to be connected cable 17 to closed, as shown in Pig.2 dash-dotted lines.

By unscrewing the two-way connector 18 shown in FIGS. 3-5, the capacitor can be opened in a conventional manner form can also be used as a loop-through capacitor

Of course, further variants of the connection elements A and A ^{1 are} possible without having to change the basic construction and the method of manufacture of the interference suppression capacitor. For example, connection elements with a solder connection or with an internal thread in the pin 2 respectively. 2 'before see.

Claims (2)

Albert Rupreeht / Ludwigsburg RA.241925 * 12.5.6 £ Claims for protection 1) Winding capacitor for dissipating point interference voltages in the on-board network of motor vehicles, e.g. on the alternator, on contact regulators, on the ignition coil or other equipment, characterized by that as a supporting component of the capacitor a centrally arranged in the capacitor winding (B) Insulating rod (1) or an insulating tube (3) with connection elements (A, A ') anchored therein on both sides is, and that the cable respectively. the ground connection either directly on the face of the capacitor winding (B) applied contact means (8,8 ') take place or at a short distance from it, for example on shoulder pieces (4,4 ')> which are connected to the contacting means (8,8 ·) in an electrically conductive manner. 2) wound capacitor according to claim 1, characterized in that the screw bolt serving the ground connection 5! of Connection element A 'is designed in the shape of a sheet metal screw.