JPS6129524B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water-cooled capacitor element with an improved cooling structure.

A conventional cooling structure for a high-frequency water-cooled capacitor element will be explained with reference to the drawings. FIG. 1 shows a partially expanded view of a capacitor element, in which electrode aluminum foils 3 and 4 are stacked between a plurality of stacked sheet-like dielectrics 1a and 1b. One electrode aluminum foil 3
is exposed to the outside of the sheet-like dielectrics 1a, 1b, and the other electrode aluminum foil 4 is exposed to the outside of the sheet-like dielectrics 1a, 1b.
The lead terminal 6 is placed at the center of the terminal and the wound lead terminal 6 is inserted at an appropriate position to form a terminal on one side. After winding these, the exposed portions 3a of the electrode aluminum foils 3 exposed to the outside of the sheet-like dielectrics 1a, 1b are sandwiched between copper strips or brass strips 5, and each is crimped with a spot weld or an eyelet 7. Incidentally, the reason why this copper strip or brass strip 5 is attached to the exposed portion 3a is to facilitate soldering of a water cooling pipe, which will be described later. FIG. 2 shows a capacitor body assembled by assembling a plurality of capacitor elements shown in FIG. 1 in order to obtain the required capacitance. 3a is an exposed portion of the electrode aluminum foil that protrudes only in one direction in the width direction, and 5 is a steel strip or brass strip fixed with a spot weld 7. Numeral 8 is a clamping plate that clamps the assembled capacitor elements 11, and 10 is an insulator for the clamping plate 8. 9 is a capacitor element 11 assembled to obtain the required capacity.
This is a tightening band that secures the parts together. Each assembled capacitor element 11 is connected to the exposed portion 3 of the electrode aluminum foil.
Tilt a horizontally. FIG. 3 shows a state in which the water cooling pipe 13 is attached to the exposed portion 3a laid down horizontally, and the water cooling pipe 13 is soldered so as to be integrated with the copper strip or brass strip 5 of the exposed portion 3a of each capacitor element 11. After that, it is housed in the case 14 and filled with insulating oil to complete the water-cooled capacitor. Note that the bushing 15 is for leading out a lead wire from one electrode aluminum foil 4 having no exposed part via the lead terminal 6, and the other electrode aluminum foil 3 is connected to the case 14 via the water cooling pipe 15. It is at the same potential as. However, in the conventional structure described above, since soldering is performed on the entire surface as shown by diagonal lines in FIG. There is a strong possibility that the film or insulating paper will melt or carbonize. Therefore, there is a risk that insulation failure will occur in this part. Furthermore, the work of spot welding the brass strip 5 and the soldering work of the water-cooled pipe 13 is very difficult, resulting in poor workability, and a large amount of solder is used, which increases the weight of the product. Electrode aluminum foil 3
Soldering of the water-cooled pipe 13 results in high temperatures, which deteriorates the dielectric material and reduces the reliability and quality of the product.

The object of the present invention is to improve the above-mentioned drawbacks and to obtain a water-cooled capacitor element with improved quality and reliability.

The present invention will be explained below with reference to the drawings. Fourth
The figure shows a partially exploded view of the capacitor element 11. When sheet-like dielectrics 1a, 1b and a pair of electrode aluminum foils 3, 4 are alternately arranged and stacked and wound in a cloth shape, one electrode The aluminum foil 3 is arranged so that one end in the width direction protrudes from the ends in the width direction of the sheet-like dielectrics 1a and 1b by approximately 1.5 times the diameter of the water cooling pipe, which will be described later. A lead terminal 6 is inserted into an appropriate position in the electrode aluminum foil 4, which is arranged at the center in the width direction of the dielectrics 1a and 1b, and serves as one lead wire. FIG. 5 shows an exposed portion 3 which is formed by cutting off the opposite corners of the exposed portion 3a of the electrode aluminum foil 3 of the capacitor element 11 shown in FIG.
Fig. 6 shows the capacitor element 1 shown in Fig. 5 in order to obtain the required capacitance.
1 shows a capacitor element assembled by collecting a plurality of 1. In the figure, reference numeral 10 denotes a protective insulation provided between the clamping plate 8 for clamping the assembled capacitor elements 11 and the capacitor elements 11. Reference numeral 9 denotes a tightening band that fixes the assembled plurality of capacitor elements 11 and the tightening plate 8 together.

FIGS. 7 and 8 show the assembly and case storage assembly of a water-cooled capacitor element employing the present invention. As shown in FIG. 7, each capacitor element 11 has a pair of opposing exposed portions 3b and 3c formed by cutting off opposing corners of the exposed portion 3a of the electrode aluminum foil 3.
Insert the straight part of the meandering water cooling pipe 13 between b and 3c to connect the water cooling pipe 1 to the exposed parts 3b and 3c.
3 is assembled so as to wrap around it, and then tightened and fixed with a tightening band 9' from above. Then, as shown in Fig. 8, this capacitor body is connected to case 1.
4 and fill it with insulating oil to complete the water-cooled capacitor. Note that the bushing 15 is connected to an output wire led out from a lead terminal provided on one electrode aluminum foil 3 of each capacitor element 11, and the other electrode aluminum foil 4 is connected to the case 14 through a water cooling pipe 13. Configured to electric potential.

In the water-cooled capacitor element of the present invention constructed as described above, since there is no need to solder the brass strip or the water-cooled pipe, assembly of the capacitor element is extremely easy and can be manufactured at a lower cost than conventional products. Furthermore, since the water cooling pipe and the electrode aluminum foil are not brought into contact with each other by soldering or the like, quality and reliability are improved. Furthermore, since no solder is used as in the past, the weight is significantly reduced, and there is no chance of the dielectric film or paper melting or carbonizing, greatly improving the quality and reliability of the product. do.

[Brief explanation of the drawing]

Fig. 1 is a partially exploded view of a capacitor element, Fig. 2 is a perspective view of a capacitor element, Fig. 3 is a sectional view schematically showing a conventional water-cooled capacitor element, and Fig. 4 is a water-cooled capacitor of the present invention. Figure 5 is a perspective view of a capacitor element used in the water-cooled capacitor element of the present invention, and Figure 6 is a partial exploded view of a capacitor element used in the water-cooled capacitor element of the present invention. FIG. 7 is a perspective view showing a state in which a water cooling pipe is attached to a capacitor element body, and FIG. 8 is a sectional view schematically showing a water cooling type capacitor according to the present invention. 1a, 1b, 1c...sheet-like dielectric material, 3, 4...
Aluminum foil, 3a...Exposed part, 3b, 3c...Pair of opposing exposed parts, 11...Capacitor element, 13...
Water cooling pipe, 14...case.

Claims (1)

[Claims] 1 A pair of electrode aluminum foils and sheet-like dielectrics are alternately arranged and stacked, and one electrode aluminum foil is positioned so that one end in the width direction protrudes from the end in the width direction of the sheet-like dielectric. A capacitor element was constructed by assembling a plurality of capacitor elements wound in a cloth shape, and a water cooling pipe was arranged so as to touch the exposed part of the electrode aluminum foil in each capacitor element of this capacitor body, and the capacitor element was housed in a case. In the method, opposite corners of the exposed portion of the electrode aluminum foil in each of the capacitor elements are cut off to form a pair of opposing exposed portions, and the pair of opposing exposed portions wraps a water cooling pipe placed between them. A water-cooled condenser characterized by: