DE869510C - Electrical capacitor made from metallized dielectric strips with a front electrode connection - Google Patents

Description

Electric force densatories, e.g. B. wound capacitors, or boring metal coverings on dielectric bands are made by metallizing, are usually provided with sprayed metal bridges on the end faces in order to be able to connect the supply electrodes of the circuit to them. However, the use of such metal bridges for the power connection involves difficulties, namely because a change in the pressing pressure exerted on the capacitor winding can easily lead to the metal bridges flaking off. A change in the pressing pressure is desirable, however, because when the capacitors are impregnated, the impregnating agent penetrates better at a low pressing pressure, while a high pressing pressure is required for the subsequent treatment and operation of the condenser. One might therefore think of the M - etallbrücken on the end faces after the impregnation under increased pressing pressure applied. However, this would have the disadvantage that the bridges would be very difficult to adhere to the impregnated winding.

According to the invention, these difficulties are avoided by that as a contact surface for the face electrode connection instead of the sprayed on Metal bridges Metal foils are used, which are folded at the edge of the capacitor are inserted. Any solderable metal is suitable as a metal foil, including aluminum, z. B. in the form of copper-plated aluminum, which also provides the connection.

With a round capacitor winding you can z. B. when winding on The edge of the metallized metal strips is a narrow, U-shaped metal foil run in with. This touches each other on the outside of the individual turns and forms a uniform metallic surface for the power connection.

U-shaped metal foils, which are also folded like a concertina, are inserted into capacitor packs that are folded in the manner of a concertina. -In Figs. I to 3 embodiments of the invention are shown.

Fig. I shows a partial section of a wound capacitor; Fig.:2 and 3 show partial sections of folded flat capacitors.

Fig. I shows a partial section through some layers of a single-layer wound capacitor. At the edge between the metallized dielectric layers 5 and 6 , folded over metal foils 7 and 8 are inserted. In Fig. 2, a package of a folded capacitor is shown in a partial cross-section, which contains two metallized papers 9 and io and a non-metallized additional paper ii. The U-shaped metal foils 12 and 13 are also folded like a harmonica at the edge and are inserted over them.

Fig. 3 shows a partial cross-section of a capacitor pack, which consists only of a paper 14 metallized on both sides. Here, too, two folded metal foils 15 and 16 are inserted at the edge for connection.

Claims (3)

PATENT CLAIMS. i. Made from metallized dielectric tape electrical capacitor with end-face electrode connection, characterized in that that as a contact surface for the end-face electrode connection, metal foils on the edge are provided folded. : 2. Capacitor according to Claim i, characterized in that the edge of the metal foil is folded and wrapped in a wound capacitor. 3. Capacitor according to claim i, characterized in that the metal foil is folded at the edge in a concertina-like folded flat capacitor block with inserted.