JP2585686Y2 - Three-phase capacitors - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-phase capacitor.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional three-phase capacitor composed of flat elements has a pair of flat plates 11a, 11b, and 11c, and plates 12b and 12c inserted between the flat plates 11a, 11b, and 11c.
Are secured by the overlapping band 16 to achieve insulation between the flat elements 11a to 11c and stabilization of characteristics. And this band 16
The element clamped in step was stored in the case 17. At this time, between the flat element 11a and the plate 12b and between the flat element 11b
The interphase insulating sheet 13 having a folded portion of 10 mm to 15 mm as shown in FIG. 7 is inserted between the flat elements 11a and 11c.
b, 11b and 11c are insulated between the
The element insulating sheet 14 as shown in FIG. 8 is inserted between the flat element 11a and the flat plate 11d and between the flat plate 11d and the flat element 11c to wrap the flat elements 11a to 11c and to insulate the case 17 from the flat element 11a. .
In addition, end face insulating sheets 15a, 15b, and 15c as shown in FIG. 9 are inserted under the flat elements 11a to 11c to insulate the element end face from the case 17.

[0003]

In the conventional method of assembling a three-phase capacitor using an insulating sheet as described above, the interphase insulating sheet is displaced from the plate, or the element body insulating sheet or the end face insulating sheet is displaced. It may be sluggish,
There are drawbacks such as difficulty in performing band tightening at the time of assembly and a large number of parts. The present invention solves such a problem, and aims to provide a three-phase capacitor that can easily perform insulation between phases and between cases and that can surely perform insulation. It is.

[0004]

In order to achieve the above object, a method of assembling the present invention is to provide a boat-like structure in which an insulating sheet for interphase insulation, a base element insulating sheet for insulating between a flat element and a case are integrated. Is used.

[0005]

According to the structure of the present invention, the band can be fastened without shifting or loosening of the interphase insulating sheet and the elementary body insulating sheet, the assembly can be simplified, and the insulation can be reliably performed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view and a side view showing a method of assembling a three-phase capacitor according to a first embodiment of the present invention;
FIG. 2 is a perspective view of an insulating dish according to the first embodiment of the present invention,
FIG. 3 is a perspective view of the end surface insulating sheet according to the first embodiment of the present invention. In FIG. 1, boat-shaped insulating plates 3a to 3c made of resin as shown in FIG. 2 having the same bottom width as the corresponding plate 2 having a width wider than the flat elements 1a to 1c are used. , Between the flat plate 2c and the flat element 1b, and between the flat plate 2d and the flat element 1c. Are inserted, laminated, and fastened by the band 5. The depth A of the insulating plates 3a to 3c is at least 1.5 times the width of the plate 2 and the plate, that is, the thickness of the element group of each phase. As a result, the insulating plate 3a is fitted inside the insulating plate 3b and the insulating plates overlap, so that the flat element 1b and the case 6 are insulated. The same result is obtained for the flat element 1c. With the above configuration, the insulation between the phases can be performed with one insulating plate of the present invention, and at the same time, the insulation between the element and the case can be performed by forming the insulating plate into a shape having an overlapping portion.

FIG. 4 is a front sectional view and a side view showing a method of assembling three-phase capacitors according to a second embodiment of the present invention, and FIG. 5 is a perspective view of an insulating plate according to the second embodiment of the present invention. In this embodiment, the insulating plate 3 in the first embodiment uses an insulating plate 7 having folded portions at both ends of a boat-shaped plate as shown in FIG. The folded portion at both ends of the insulating plate 7 has the same length as the depth of the insulating plate 7 and is used to insulate the element end face from the case by tightening the element group with the band 5 and then turning it back. Similar results can be obtained without using the end surface insulating sheet used in the example.

[0008]

According to the present invention, as is apparent from the above embodiment, the band can be fastened without displacing or loosening the interphase insulating sheet and the element insulating sheet, and the assembling can be performed easily and securely. Insulation can be done,
This has the effect of increasing insulation reliability.

[Brief description of the drawings]

FIG. 1 is a front sectional view and a side view showing a method of assembling a three-phase capacitor according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the insulating dish according to the first embodiment of the present invention.

FIG. 3 is a perspective view of the end face insulating sheet according to the first embodiment of the present invention;

FIG. 4 is a front sectional view and a side view showing a method of assembling three-phase capacitors according to a second embodiment of the present invention.

FIG. 5 is a perspective view of an insulating dish according to a second embodiment of the present invention.

FIG. 6 is a front sectional view and a side view showing a method of assembling a conventional three-phase capacitor.

FIG. 7 is a perspective view of a conventional insulating dish.

FIG. 8 is a perspective view of a conventional body insulating sheet.

FIG. 9 is a perspective view of a conventional end face insulating sheet.

[Explanation of symbols]

1,11 ... flat element, 2, 2a, 2b, 2c, 2d, 1
2, 12a, 12b, 12c, 12d ... this plate, 3, 3a, 3
b, 3c, 7, 7a, 7b, 7c ... insulating plate, 4, 4
a, 4b, 4c, 15: end surface insulating sheet, 5, 16: band, 6, 17: case, 13: interphase insulating sheet, 14: elementary insulating sheet.

Claims (1)

(57) [Scope of request for utility model registration] 1. A three-phase capacitor obtained by laminating one or a plurality of flat elements via a flat plate wider than the flat elements, and compressing the flat plates at both ends in the stacking direction. A resin boat-shaped insulating plate with a thickness of 0.1 mm to 2.0 mm and a depth of at least 1.5 times the width between the plates is installed between the phases to insulate between each phase and between the flat body and the case. A three-phase capacitor, characterized in that: