JPH027458Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to, for example, high-voltage capacitors that use a single ceramic plate as a dielectric.
In particular, it relates to the laminated structure of the element single plate.

(b) Prior Art This type of capacitor is constructed by stacking and fixing a large number of element single plates, each of which has a ceramic single plate as a dielectric material, and has baked-on electrodes on both sides. This stacking and fixing of element veneers is actually done by interposing a lead plate between the element veneers and pasting them with adhesive while aligning each element one by one. Currently, it is difficult to stack and fix veneers in the correct position with high precision.

(c) Purpose This idea was created in view of the above circumstances.
It is an object of the present invention to provide a capacitor having a structure in which single element plates are easily stacked and fixed with high precision.

(d) Configuration And in this invention, positioning holes are provided at the same predetermined position in each single element plate, and a positioning rod made of an insulating material is used to be inserted into the positioning hole in each single element plate. Its more detailed structure consists of stacking multiple ceramic veneers with electrodes attached to both sides, and fixing them together by placing terminal fittings on the top and bottom surfaces. In a capacitor made of a capacitor, a positioning hole is provided at the same predetermined position in each element single plate, and each element single plate is placed in a predetermined position with a positioning rod made of an insulating material inserted into the positioning hole. This is a capacitor that is laminated and fixed.

(e) Examples Examples of this invention will be described below in detail with reference to the drawings, but this invention is not limited to the following examples.

First, before explaining the overall configuration, each component will be explained with reference to FIGS. 1 to 3.

What is shown in FIG. 1 is a single element plate 1, which is used in large numbers when constructing the capacitor of this invention. The element single plate 1 has a single plate 2 made of a disc-shaped ceramic serving as a molded dielectric, and silver baked electrodes 3 are attached to both sides of the single plate 2, respectively. A positioning hole 4 is provided at the center of the element single plate 1, and this positioning hole 4 is similarly provided at the center of all the element single plates 1 used.

The terminal fitting 5 made by Shinchiyu is shown in Figure 2.
Two terminal fittings 5 are used above and below the capacitor. The terminal fitting 5 consists of a disc-shaped base 6 and a protrusion 7 that protrudes upward from the center of the base 6.A large number of holes 8 are provided around the base 6 toward the center, and each hole 8 is provided with a plurality of holes 8. has base 6 in the center
It communicates with the lower part of the insertion fixing hole 10 of the positioning rod 9 shown later, which is provided so as to extend inward from the lower side. A screw 11 is cut into the narrow inner surface of the upper part of the fitting fixing hole 10.

What is shown in FIG. 3 is a positioning rod 9, which has a stud shape with screws 12 cut in the upper and lower parts. The positioning rod 9 is made of an insulating material such as FRP (fiber reinforced plastics), and its diameter is slightly smaller than the diameter of the positioning hole 4 of the element single plate 1.

The overall structure of the capacitor according to this invention will be explained in more detail with reference to FIG. 4, together with the manufacturing procedure.

Place the terminal fitting 5 so that the protruding part 7 is positioned downward and the base 6 is positioned upward, and insert the lower threaded part 1 of the positioning rod 9 into the threaded part 11 in the fitting fixing hole 10 of the base 6.
2 and set it upright. This positioning rod 9 is inserted through the positioning hole 4 of the element single plate 1, and if necessary, a lead plate 14 is interposed to improve electrical contact, and a parallel connection is inserted at a predetermined position. The element single plate 1 is interposed with an intermediate terminal 15 for
The layers are sequentially stacked. After all the element veneers 1 have been laminated, terminal fittings 5 are attached to their upper surfaces. At this time, the threaded portion 11 of the fitting fixing hole 10 of the terminal fitting 5 is screwed into the threaded portion 12 of the positioning rod 9, and the element single plates 1 are assembled to form a capacitor. Note that 16 is a lead wire.

The capacitor thus obtained is placed in, for example, a mold, and a molding resin such as polyurethane resin or epoxy resin is injected therein. If a hole 8 is provided in the terminal fitting 5, the resin will pass through the hole 8 and reach the fitting fixing hole 10, and the resin will further pass through the hole 8 when the positioning rod 9 of the positioning hole 4 of the element single plate 1 is inserted. This is convenient because it also invades the remaining gap space. If a gap space remains, partial discharge will occur in that portion, reducing the voltage resistance performance of the capacitor device.

In the above embodiment, the positioning hole in the element veneer 1 was provided at the center, and one positioning rod was used. The positioning accuracy may be increased.

Further, if both ends of the positioning rod are fixed to the terminal fittings as in the above embodiment, the structure becomes simple and assembly can be easily performed.

Furthermore, the positioning rod may be made of an appropriate insulating material, but if an epoxy resin that is cured at a high temperature is used for resin molding of the exterior, it should be made of a material that does not deform due to the temperature. You need to choose.

Although the above embodiment shows the case where the capacitor according to this invention is embedded in the molded resin 13, it may be housed in a tank filled with insulating oil or gas to form a capacitor device. You can.

(F) Effects Since this invention is constructed as described above, the element single plates can be easily stacked and fixed with high precision, so that a highly reliable capacitor can be obtained.

[Brief explanation of drawings]

Figure 1 is a perspective view of an embodiment of a single element plate used in this invention; Figures 2A, B, and C are perspective views, side views, and plan views of terminal fittings; and Figure 3 is a positioning rod. FIG. 4 is a front view of an embodiment of the present invention, and FIG. 4 is a longitudinal sectional view of an embodiment of the capacitor of this invention. 1... Element single plate, 2... Single plate, 3... Baked electrode, 4... Positioning hole, 5... Terminal fitting, 9...
...Positioning rod.

Claims (1)

[Scope of utility model registration request] In a capacitor that is made by laminating a plurality of ceramic single plates with electrodes attached on both sides, and fixing them together by placing terminal fittings on the top and bottom surfaces, each single element plate is A positioning hole is provided at the same predetermined position, and a positioning rod made of an insulating material and having an outer diameter slightly smaller than the inner diameter of the positioning hole is inserted through the positioning hole, and both ends of the positioning rod are inserted into the positioning hole. A capacitor that is fixed to a terminal fitting having a large number of holes that communicate with the gaps formed between the openings and the positioning rod, and in which each element single plate is stacked and fixed at a predetermined position.