JPH0727142U - Capacitor element - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] When a lead wire made of a mesh lead wire is inserted inside a capacitor element, the dielectric sheet may be damaged by the lead wire. The present invention aims to protect the dielectric sheet from the lead wires. [Structure] An insulating paper such as a kraft paper 6 is provided between the lead wire 4 and the dielectric sheet 2 facing the lead wire 4. Also, the electrode foil 1 whose front surface faces the lead wire and the dielectric sheet 2A which faces the back surface of this electrode foil.
Insulation paper is installed between the and. By interposing the insulating paper between the lead wire and the dielectric sheet, the dielectric sheet can be protected from the lead wire.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a capacitor element.

[0002]

[Prior art]

 The capacitor element used in oil-immersed capacitors is composed of a pair of electrode foils, a plurality of resin films or a dielectric sheet made of a composite of this and insulating paper, stacked together and wound, and the leads drawn from the electrode foils. It is constructed by deriving a line. A mesh-shaped mesh lead wire is used as the lead-out lead wire, and the lead wire is inserted between the electrode foil and the dielectric sheet every time the electrode foil and the dielectric sheet are wound a certain number of times.

However, when the lead-out lead wire is inserted in this way, since the lead-out lead wire has a mesh structure, the lead-out lead wire and the dielectric sheet and the electrode foil on both sides thereof are pressed against each other by tightening. This pressure may cause fine irregularities on the dielectric sheet to form a mesh. Also, in some cases, another dielectric sheet facing the back surface of the electrode, the surface of which faces the lead wire, may also have the same unevenness scratches through the electrode foil. If such a scratch is formed on the dielectric sheet, the dielectric performance and insulation performance of the dielectric sheet will be impaired, which is not desirable.

[0004]

[Problems to be solved by the device]

 The present invention aims to protect the dielectric sheet so as to prevent it from being damaged by the lead wire.

[0005]

[Means for Solving the Problems]

 The present invention is characterized in that an insulating paper such as craft paper is provided between the lead wire and the dielectric sheet facing the lead wire. In addition to the insulating paper, the insulating paper is further provided between the electrode foil whose front surface faces the lead wire and the dielectric sheet which faces the back surface of the electrode foil.

[0006]

[Action]

 Since the insulating paper is interposed between the lead wire and the dielectric sheet, the lead wire does not damage the dielectric sheet even if it is pressed by the winding. Similarly, the dielectric sheet facing the back surface of the electrode foil is not damaged.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 is an electrode foil, 2 is a dielectric sheet, and a plurality of dielectric sheets 2 are superposed between a pair of electrode foils 1 and wound to form a capacitor element 3. This is as described above.

Reference numeral 4 denotes a lead wire, which is composed of a mesh-shaped mesh lead wire, and is arranged between the electrode foil 1 and the dielectric sheet 2 every time the electrode foil 1 and the dielectric sheet 2 are wound a certain number of times. Is inserted. Reference numeral 5 denotes a lead-out portion formed by twisting the tips of the respective wires forming the lead-out lead wire 4. The above configuration is not particularly different from the conventional one.

According to the present invention, as shown in FIG. 2, insulating paper, for example, kraft paper 6 is provided between the lead wire 4 and the dielectric sheet 2 facing the lead wire 4. The craft paper 6 is installed by inserting it simultaneously with the insertion of the lead wire 4.

By interposing the kraft paper 6 in this way, when the electrode foil 1 and the dielectric sheet 2 are wound and tightened, the electrode foil 1, the lead wire 4 and the dielectric sheet 2 are pressed against each other. However, the presence of the kraft paper 6 does not directly press the lead wire 4 against the dielectric material facing the lead wire 4, and thus the dielectric sheet 2 is not damaged by the lead wire 4. .

When the capacitor element 3 is impregnated with insulating oil, the insulating oil is easily impregnated into the inside of the capacitor element 3 through the craft paper 6. Therefore, the withstand voltage of the capacitor element 3 is improved, which is convenient.

On the other hand, the surface of the dielectric sheet 2 A facing the back surface of the electrode foil 1 whose surface faces the lead wire 4 may also be damaged by the lead wire 4. In order to prevent this, a similar craft paper 6A is provided between the electrode foil 1 and the dielectric sheet 2A as shown in FIG. This can protect the dielectric sheet 2A as well.

[0013]

[Effect of device]

 As described above, according to the present invention, even when the lead wire is inserted between the electrode foil and the dielectric sheet, the lead wire has a simple structure in which an insulating paper such as kraft paper is interposed. This has the effect of preventing the occurrence of scratches on the dielectric sheet due to.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of the present invention in an exploded manner.

FIG. 2 is an enlarged cross-sectional view of a part of FIG.

FIG. 3 is an enlarged cross-sectional view showing a modified example of FIG.

[Explanation of symbols]

 1 Electrode foil 2 Dielectric sheet 2A Dielectric sheet 4 Lead wire 6 Insulating paper (craft paper) 6A Insulating paper (craft paper)

Claims (2)

[Scope of utility model registration request] 1. A capacitor element in which a plurality of dielectric sheets are superposed and wound between a pair of electrode foils, and lead-out lead wires consisting of mesh-like mesh lead wires are led out from the electrode foils. A capacitor element in which an insulating paper is provided between a lead wire and a dielectric sheet facing the lead wire. 2. The capacitor element according to claim 1, wherein an insulating paper is provided between an electrode foil having a front surface facing the lead wire and a dielectric sheet facing the back surface of the electrode foil.