JPH08167539A - Oil filled capacitor for electric power - Google Patents

Abstract

PURPOSE: To unify oil impregnation property of a capacitor base to be laminatedly sealed into a case so as to eliminate dispersion in a characteristic in an oil filled capacitor for electric power. CONSTITUTION: Capacitor bases 1 to be composed of by flatly winding about a filmy dielectric and an electrode foil are laminated in the horizontal direction in a longitudinal position where projecting electrodes 3 which are both ends of electrode foils projecting from the dielectric are located on both of right and left sides for being sealed inside a case 2 together with insulating oil so as to prevent own weight of the other capacitor bases 1 from acting on some capacitor bases 1 as compressive force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-filled capacitor for electric power in which a capacitor element body composed of a film-shaped dielectric material and an electrode foil is laminated and enclosed in a case,
Specifically, it relates to a laminated structure of capacitor bodies in a case.

[0002]

2. Description of the Related Art As shown in FIG. 2, a capacitor for electric power is formed by laminating capacitor bodies 1, 1 ... Composed of film-shaped dielectrics and electrode foils, and sealed in a case 2 together with insulating oil. There is something I did. The capacitor body 1 is formed by flatly winding a long film-shaped dielectric and an electrode foil on top of each other. On both sides of each capacitor body 1, both ends in the width direction of the electrode foil are dielectric. The protruding electrode 3 is formed by protruding from the body, and the lead wire 4 is connected to the protruding electrode 3 via the clip terminal 4a.

In this type of oil-filled capacitor, various methods are conceivable for stacking and encapsulating the capacitor element body 1, but conventionally, the protruding electrode 3 is crushed by the weight of the capacitor element body 1. In order not to have the above, the capacitor body 1 is laid horizontally so as to lie substantially horizontally, and is vertically stacked on each other (vertical direction). Then, the laminated capacitor element bodies 1 are joined by the fixing plate 5 and the fixing band 6 which are applied to the upper and lower sides thereof, and are enclosed in the case 2 together with the insulating oil.

[0004]

By the way, like the conventional capacitor of this type, when the capacitor element bodies 1 are horizontally placed and vertically stacked and enclosed in the case 2 in the laminated state, the lower capacitor element bodies are formed. 1 is heavily loaded. In the case 2, the insulating oil permeates the inside of each capacitor element body 1, but since the large load is applied to the lower capacitor element body 1 as described above, the insulating oil does not sufficiently penetrate into the inside. . Therefore, the oil impregnating property becomes uneven between the upper and lower capacitor bodies 1 and 1, and the characteristics of the capacitor may vary.

The present invention has been made in view of the above problems of the prior art. By improving the method of stacking and encapsulating the capacitor element body, the oil impregnation property of the capacitor element body is made uniform and the characteristic The challenge is to eliminate variations.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a case in which a film-shaped dielectric body and a capacitor element body obtained by flatly winding an electrode foil are laminated on each other, together with insulating oil. An oil-filled capacitor for electric power, which is encapsulated inside and uses both ends of the electrode foil in the width direction as projecting electrodes by projecting from the dielectric, wherein the projecting electrodes are formed on both left and right sides. In a vertically long posture, they are laminated in one substantially horizontal direction.

[0007]

In the case, since the capacitor bodies are stacked in a substantially horizontal direction and are vertically adjacent to each other in the same direction, the weight of one of the capacitor bodies also acts as a compressive force on another capacitor. Never. Therefore, the oil impregnation property of the capacitor body is made uniform.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to an embodiment shown in FIG. FIG. 1 is a perspective view showing the inside of an oil-filled capacitor for electric power according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is a capacitor body, 2 is a case, 3 is a protruding electrode, 4 is a lead wire, Reference numeral 5 is a fixed plate, and 6 is a fixed band.

The capacitor element body 1 is, like the conventional capacitor element body of this type of oil-filled capacitor, a long film-shaped dielectric and an electrode foil which are flatly wound in a state of being superposed on each other. On both sides of each capacitor body 1, protruding electrodes 3 are formed by projecting both ends in the width direction of the electrode foil from the dielectric material, and each protruding electrode 3 has a lead wire 4 via a clip terminal 4a. It is connected.

The oil-filled capacitor according to the present invention is characterized by the way in which these capacitor element bodies 1 are stacked and how they are enclosed in the case 2. The plurality of capacitor element bodies 1 each have protruding electrodes 3 protruding to the left and right sides. Are vertically oriented and are stacked in the horizontal direction so that they are adjacent to each other in the thickness direction. And the laminated capacitor element body 1
Is integrally joined by the fixing plate 5 and the fixing band 6 applied to the front and rear of the laminated body, and is sealed in the case 2 together with the insulating oil in the laminated state.

In the above structure, the capacitor body 1
Are adjacent to each other in the horizontal direction, the weight of one of the capacitor bodies 1 does not act on the other capacitor body 1 as a compressive force. Therefore, a large compressive force is not applied to a part of the capacitor body 1,
The insulating oil sufficiently penetrates into the inside of the capacitor, and the oil impregnation property between the capacitor element bodies 1 becomes uniform.

[0012]

As described above, according to the present invention, the partial weight of another capacitor element body does not act as a compressive force on a part of the capacitor element body, and the oil is provided between the capacitor element bodies. Impregnation becomes uniform, and the characteristics of the capacitor do not vary.

[Brief description of drawings]

FIG. 1 is a perspective view showing the inside of an oil-filled capacitor for electric power according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the inside of a conventional oil-filled capacitor for electric power.

[Explanation of symbols]

 1 Capacitor body 2 Case 3 Protruding electrode 5 Fixing plate

Claims (1)

[Claims] 1. A capacitor element body formed by flatly winding a film-shaped dielectric and an electrode foil is laminated on each other and enclosed in a case together with insulating oil, and both ends in the width direction of the electrode foil. Is an oil-filled capacitor for electric power, which is a protruding electrode protruding from the dielectric, wherein a plurality of capacitor bodies are laminated in a horizontal orientation in a vertically long posture in which the protruding electrodes are located on both left and right sides. An oil-filled capacitor for electric power, characterized in that