JPS5928324A - Condenser - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a capacitor in which a metallized paper for electrodes and a plastic film for a dielectric (insulator) are wound together and a metallicon is applied.

Conventional structure and its problems Traditionally, this type of capacitor was made by stacking metallized paper for electrodes with a margin on one side or metalized paper for electrodes of a non-margin type with plastic for the dielectric by shifting the size of the margin part. , a method of winding the wire in a configuration as shown in FIG. 1 or FIG. 2 was common. In the figure, 1.
1' is a metallized paper for electrodes, 2 is a plastic film for electric conductors, 3 is a metallicon portion, and 1a is a margin portion.

This configuration has the advantage that an electrically stable capacitor can be manufactured because the dielectric is only the plastic film 2. In addition, since the electrodes use metallized paper 1.1', which has metal vapor deposition on both sides of the capacitor paper, it has a self-healing effect, and when impregnated with insulating oil, it penetrates through the fibers of the capacitor paper, so the impregnation It also had the advantage of being easy to use. However, on the other hand, when a margin type metallized paper 1 for electrodes is used as shown in Fig. 1, there is a loss of area in the margin 1a portion, and a large number of vapor deposition molds are required for each electrode width. Management costs were required. Next, when using the non-margin type metallized paper 1' for electrodes as shown in Fig. 2, the above-mentioned margin loss and the fact that it can be vapor-deposited over the entire surface of the material for vapor deposition and cut to any width can be used. However, since there is no margin, it is necessary to shift the electrode concavely by the amount of the margin to prevent a short circuit between the electrodes due to the metal contact 3, as mentioned above. There is. Generally, this shifting part requires about 1 to 3 fi, but since the thickness of the electrode is around 10 μm, this shift alone is not perfect, and the metal of Metallicon 3 partially penetrates, reducing the insulation resistance between the electrodes. This had the disadvantage of lowering the yield.

OBJECTS OF THE INVENTION An object of the present invention is to provide a high-performance capacitor that uses non-margin type electrode paper to simplify material management and prevent a decrease in insulation resistance.

Structure of the Invention This invention involves sandwiching a metalized paper with a plastic film folded in half, leaving only one edge of the paper.
A plurality of layers of this sandwich-like laminated film are laminated so that the exposed edges of the metallized paper are alternately placed on opposite sides. Therefore, insulation can be ensured while using non-margin type metallized paper.

DESCRIPTION OF THE EMBODIMENTS One embodiment of the present invention is shown in FIGS. 3 and 4. That is, this capacitor has non-margin metalized paper 1 for electrodes.
' and a sheet of hand-analyzed plastic film 2' made by exposing only one edge 1b of this metallized paper 1' on both the front and back sides and sandwiching the remaining part in a sandwich-like manner. A plurality of layers are stacked and wound so that the exposed edge portions 1b are alternately located on opposite sides, and metallicon 3 is applied to the end face of the wound body. Such an element was housed in a metal container (not shown) and impregnated with mineral oil to form a capacitor.

This embodiment, conventional example 1 in Fig. 1, and conventional example 1 in Fig. 2
100 pieces of each were manufactured and their properties were compared. The used distillate is as shown in Table 1 6a-1, 8-2, 8-3
indicates the dimensions of each part.

Table 1 and FIG. 5 show measurement data for the capacitance of the capacitors of this embodiment and Conventional Example 1.1 (100 capacitances each were measured).

Note that the average value of this example is lOO, and all other values are expressed as ratios (however, all 100 sidetone data). The capacitance was 80% higher than that of Conventional Example I, and 4% higher than that of Conventional Example I. That is, it shows that the ratio of the effective counter electrode area to the same total electrode area is high, and it is reasonable that the electrode area can be saved when obtaining the same capacitance.

FIG. 6 shows comparative data obtained by measuring the insulation resistance between terminals of 20 capacitors randomly selected from a group of capacitors manufactured with the above three types of structures. Moreover, FIG. 7 shows data obtained by extracting five samples and measuring partial discharge inception voltage using the same method as above. Looking at all of these data, the capacitor manufactured in this example has better characteristics than any of the structures of Conventional Example II, and can also be manufactured at a lower price.

Effects of the Invention The present invention has the advantage that it is possible to provide a high-performance capacitor that prevents a decrease in insulation resistance while simplifying material management by using a non-margin type electrode paper.

[Brief explanation of the drawing]

Fig. 1 (A) is a perspective view of conventional example ①, Fig. 1 B) is a partial sectional view thereof, Fig. 2 (5) is a perspective view of conventional example I, Fig. 2 C
B) Fi is a partial sectional view, FIG. 3 is a perspective view of one embodiment of the present invention, FIG. 4 is a partial sectional view thereof, and FIG. 5 is a partial sectional view of this embodiment and conventional example 1. 6 is a comparative diagram of measured values of insulation resistance between the heirs of this embodiment and conventional example 1.1, and FIG. 7 is a comparative diagram of the measured values of insulation resistance between this embodiment and conventional example 1.1. FIG. 2 is a comparative explanatory diagram of measured values of partial discharge inception voltage of I. 1.1'...metalized paper, ■b...edge, 2.2'
... Pufnutik film, 3 ... Metallicon, 4
...Layered film Figure 3 Figure 4

Claims (1)

[Claims] A superimposed film consisting of a non-margin metallized paper for TTI and a semi-analyzed plastic film with only one side edge of the metallized paper exposed on both the front and back and the remaining part sandwiched in the shape of a sandwich. , a capacitor formed by winding a plurality of layers in a stacked manner so that the exposed edge portions alternately go around opposite sides, and applying metallicon to the Noh side of the wound body.