JPS6344978Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the configuration of a three-phase capacitor in which three capacitor elements are housed in a case.

As shown in FIG. 1, a conventional three-phase capacitor has three capacitor elements 1a, 1b, and 1c housed in a case 2, and lead wires 3a, 3b, and 3c.
2 bent in an L-shape between the central capacitor element 1b and the capacitor elements 1a and 1c on both sides.
Two sheets of insulating paper 4a, 4b are inserted.

However, in such a conventional product, the two sheets of insulating paper 4a and 4b must be inserted separately, resulting in poor workability during manufacturing.
capacitor elements 1a and 1 because capacitor elements a and 4b are easily removed.
This has disadvantages in that the insulation between b and 1c tends to deteriorate, and the temperature tends to rise due to the capacitor elements 1a, 1b, 1c being in close contact with each other, resulting in poor reliability.

Therefore, the present invention eliminates such conventional drawbacks and provides a three-phase capacitor that can be manufactured with good workability, can reliably maintain insulation between each capacitor element, and has little temperature rise. The purpose is to

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 2 shows one embodiment of the present invention, in which three capacitor elements 5a, 5b, and 5c are arranged and housed in a case 6 whose inner surface is made insulating. 7a, 7b, and 7c are lead wires for connecting and drawing out the respective capacitor elements. Reference numeral 8 is an insulating paper for interphase insulation which is the most characteristic feature of the present invention, and the insulating paper 8 as shown in FIG. 3 is bent into a U-shape to form two end pieces 9a, 9c and a central piece 9b.
The two end pieces 9a and 9c are connected to the center capacitor element 5b and the capacitor elements 5a and 5 on both sides, respectively.
Insert it between it and c. moreover,
The two end pieces 9a and 9c each have one side edge extending in opposite directions to form the extending portion 1.
0a, 10c, and their extending portions 10a,
10c are bent so as to cover the top and bottom of the central capacitor element 5b, respectively.

With this configuration, only one sheet of insulating paper 8 can be used, making it easy to assemble the three capacitor elements 5a, 5b, 5c and the insulating paper 8 and store them in the case 6 during manufacturing. This can significantly improve work efficiency. Moreover, in this way, the insulating paper 8 is connected to the center piece 9b and the 2
two end pieces 9a, 9c and two extensions 10a, 10
Since the capacitor element 5b in the center is sandwiched between the capacitor elements 5b from five sides by the capacitor elements 5a and 5c, there is almost no possibility that the insertion position of the insulating paper 8 will shift, and the isolation between the capacitor elements 5a, 5b, and 5c can be ensured. can ensure a good insulation state, and each capacitor 5a, 5b, 5
It is possible to prevent a temperature rise due to the close contact of c and can significantly improve overall reliability. As shown in FIG. 4, notches 11a and 11c are formed by cutting off the side edges of the two end pieces 9a and 9c of the insulating paper 8 opposite to where the extensions 10a and 10c are provided. If the end pieces 9a, 9c of the insulating paper 8 are inserted between the capacitor elements 5a, 5b, 5c as shown in FIG.
Lead wires 7a and 7 for connecting b and 5c, respectively
There is no risk of contact with c, and the workability of assembly can be further improved.

Furthermore, if the length t of the central piece 9b of the insulating paper 8 is made smaller than the diameter T of the central capacitor element 5b, both end pieces 9 of the insulating paper 8 can be
a, 9c work to separate the capacitor elements 5b in the center from the capacitor elements 5a, 5c on both sides, and can secure a predetermined distance or more between the capacitor elements 5a, 5b, 5c, thereby improving insulation performance. In addition, it is possible to further improve the temperature rise caused by their close contact, and to obtain a highly reliable product with a long life.

As detailed above, according to the present invention, it is possible to improve workability during manufacturing, and also ensure good insulation between capacitor elements and prevent temperature rise, resulting in high reliability. A useful three-phase capacitor can be obtained.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional three-phase capacitor;
The figure is an exploded perspective view of a three-phase capacitor according to an embodiment of the present invention, FIGS. 3 and 4 are developed views of the insulating paper used, and FIG. 5 is a plan view of the same three-phase capacitor. 5a, 5b, 5c... Capacitor element, 6...
Case, 7a, 7b, 7c... Lead wire, 8...
Insulating paper, 9a, 9c...end pieces, 9b...center piece,
10a, 10c...extending portion, 11a, 11c...
Notch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Three capacitor elements are placed side by side in a case, and an insulating paper is folded into a U-shape. and the two end pieces of the insulating paper extend in opposite directions so that the extending portions cover the capacitor element in the center. A three-phase capacitor that is bent into a shape. (2) The three-phase capacitor according to claim 1, which is obtained by cutting off the side edges of two end pieces of insulating paper opposite to where the extensions are formed. (3) The three-phase capacitor according to claim 1, wherein the length of the central piece of insulating paper is shorter than the diameter of the central element.