JPS5936922A - High voltage condenser - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The object of the present invention is to obtain a high-voltage capacitor by assembling capacitor elements formed by winding metal foil electrodes and metal foil electrode members with bent ends with a dielectric interposed therebetween.

FIG. 4 shows the insulation structure of a capacitor element using a conventional vapor-deposited metal electrode.

In the figure, 7 indicates a vapor deposited film, and 8 indicates a metal vapor deposited electrode on the film.

A capacitor element is formed by tightly winding two vapor-deposited films 7 together. In this case, the upper vapor-deposited film 7 and the lower vapor-deposited film 7 are aligned so that the portions of the film material which are not subjected to the vapor deposition of the metal vapor-deposited electrode 8 alternate in the length direction. Capacitor elements with metal-deposited electrodes have self-healing properties.

However, even with such a configuration, the electric field concentration at the electrode end is large, so partial discharge may occur, and when partial discharge occurs, the vapor deposited electrode 8 disappears, resulting in a decrease in capacitance.

Therefore, in the present invention, a foil electrode with a bent end is used as one electrode, a vapor-deposited electrode is arranged opposite to said electrode via a dielectric, and the bent-end foil electrode and the vapor-deposited electrode are connected in advance. When winding capacitor elements using
A high-voltage capacitor can be obtained by assembling these elements without causing large deformation.

The embodiments shown in the drawings will be described below.

FIG. 3 shows an example of the insulation structure of the present invention.

In the figure, 7 is a vapor-deposited film, such as paper, polyethylene, or polypropylene film, on which aluminum is vapor-deposited, and 8 is a vapor-deposited electrode formed on the film.

In this case, the lead is led by metallizing one end after forming the element and soldering the lead to the core.

Reference numeral 6 is a film made of a metal foil similar to the vapor-deposited film, and reference numeral 5 is a metal foil, for example, an aluminum foil electrode, and both ends of the metal foil electrode 5 in the length direction are bent. In this case, when leading out the leads, it is preferable to fully insert the leads at the beginning and end of the winding, where there is no opposing electrode. As shown in the figure, vapor deposited film 7, film 6,
A capacitor element is formed by tightly winding the bent end foil electrodes 5 together.
1. A winding whose cross section is flat as shown in FIG. 2A.
2 is used.

The one shown in FIG. 1A is a flat plate-like winding core in which both ends of the winding direction of the winding core 1 are semicircular, and the one shown in FIG. It has an elliptical shape and a flat cross-sectional shape in any case, and the previous vapor-deposited film 7, film 6, end, and partially bent foil electrode 5 are wound together on the cores 1 and 2. Figure 1 B1 Figure 2 B
A capacitor element 3.4 having the shape shown in is obtained.

Normally, a capacitor element is wound around a core with a circular cross section, and then, as shown in Figure 5, in order to assemble all the capacitor elements, the capacitor element formed in a cylindrical shape is used by pressing it into a cross-sectional shape. However, if the capacitor element 3.4 is wound in advance with a flat winding core as described above, a flat capacitor element 3.4 will be created, so when these are assembled, there will be no major deformation, and therefore the capacitor It is unlikely that the performance of the element itself will be degraded. This is particularly important in those using metal vapor deposited electrodes.

In addition to the insulation configuration shown in Figure 3, 2. A configuration as shown in FIG. 6 can also be adopted. As shown in the figure, the back side of the vapor-deposited film 7 provided with the metal-deposited electrode 8 is bent at the end and
5, and the film 6 is placed on the surface facing the metal vapor-deposited electrode 8, and tightly wound around the core shown in FIG. 1A or FIG. 2A.

Capacitor element 3 formed into a cloth shape as described above
．． 4 are assembled into a capacitor body 9.

FIG. 5 shows an embodiment of the present invention, in which the capacitor body 9
is contracted into the case 10, the lid is closed, the air is degassed, and the inside is filled with insulating oil 12, and the capacitor body is used in an oil-impregnated state, but the inside is insulated with positive pressure within the operating temperature range. Fill with gas. Although numeral 11 indicates an insulator, it is needless to say that the capacitor body 9 is housed in a case 10 and that lead wires are connected to the allotrope and the insulator II in advance.

As explained above, in the present invention, the capacitor element is formed into a cloth shape by using a flat winding core,
Second, since the metal foil electrode facing the metal vapor-deposited electrode is bent at its end, it has excellent dielectric strength, and since one electrode is an all-metal vapor-deposited electrode, it can be used as an element with self-healing properties. A high voltage capacitor can be obtained by aggregating these capacitor elements.

[Brief explanation of the drawing]

Fig. 1A shows an example of a winding core of a capacitor element used in the present invention, and shows a capacitor element wound by the winding core of Bl'i and A. Examples of other winding cores of the capacitor element used in the invention are shown, and B shows a capacitor element wound by the A-figure winding core. FIGS. 3 and 6 respectively show examples of the capacitor element in the invention. The insulation structure is shown. Fig. 4 shows the insulation structure of a capacitor element using a conventional metal vapor-deposited electrode. Fig. 5 shows an embodiment of the present invention. 1... A core with a semicircular end; 2 ...Oval winding core, 3,
4... Capacitor element, 5... Bent end metal foil electrode, 6... Film, 7... Vapor deposited film, 8...
・Metal deposited electrode, 9... Capacitor body, 10...
Case, 11... Insulator, 12... Filled with insulating oil or gas. Agent Patent Attorney Hidetoshi Aoki, 0;+71 3 5 5 2 4

Claims (1)

[Claims] (1) Capacitor elements made by alternately winding metal-deposited films and metal foil electrodes with bent ends tightly using a winding core with a flat cross-section are assembled, placed in a sealed case, and impregnated with insulating oil or at operating temperature. A high-pressure capacitor characterized by being filled with an insulating gasket of positive pressure within a range.