UA95772U - METHOD FOR PRODUCING A NUMBER OF HIGH-pulse capacitors - Google Patents

Abstract

A method of making a number of high voltage pulse capacitors in which in advance, on the basis of predetermined operating parameters of the capacitor and the dimensions of the insulation case of the capacitor organic insulator of sections is chosen, with determining dimensions of section and the total number of sections, the number of sections in a group and the number of groups of sections, and then section winding is performed, assembling them in a package in which the sections are electrically interconnected in parallel in groups of sections, and the section groups are interconnected in series, section packet is mounted in the insulating housing of the capacitor and it is connected with the high voltage terminals of the capacitor, the cover is hermetically connect to the housing of the capacitor, thermo-vacuum drying and impregnation of the capacitor are performed. Keeping constant the calculated total number of sections and the magnitude of the electric voltage in each group of sections, the number of series-connected groups of sections and connected in parallel sections in the group when placing them in the insulating housing are changed, wherein as the organic dielectric of section dielectric that consists of three layers of polymer film is used.

Description

The utility model belongs to the field of electrical engineering, namely to the technology of manufacturing high-voltage pulsed capacitors, and can be used in the industrial production of high-voltage pulsed capacitors with an organic dielectric.

A known method of manufacturing high-voltage pulsed capacitors with a paper dielectric is A. I. Gulevich. Production of power capacitors / A.I. Gulevich, A.P. Kireev, - 3rd ed., revised and supplemented. - M.: Vysshaya Shkola, 1975. - 365 s|, in which, based on the specified working parameters of the capacitor and the dimensions of the metal casing of the capacitor, the paper dielectric of the section is selected, the dimensions of the section and the total number of sections are determined, the sections are wound and assembled in the package, in which the sections are electrically connected to each other, install the package of sections in the metal case, connect the package of sections to the high-voltage leads of the capacitor, which are placed on the cover of the metal case and installed in ceramic insulators, hermetically connect the cover to the metal case , perform thermovacuum drying and impregnation of capacitors. To create capacitors with other operating parameters, the number of sections in packages and ceramic insulators, which are designed for a certain voltage, are changed. At the same time, other metal cases are used, which have the same dimensions of the bottom of the case as the manufactured capacitor, and the height is chosen based on the new dimensions of the package of sections.

The signs that coincide with the essential features of the claimed method are as follows - based on the specified operating parameters of the capacitor and overall dimensions of the capacitor case, select the organic dielectric of the section, determine the dimensions of the section, the total number of sections, then perform the winding of the sections and assemble them into a package, during which the sections are electrically connected to each other, a package of sections is installed in the capacitor case, it is connected to the high-voltage terminals of the capacitor, the cover is hermetically connected to the case, and the thermal vacuum drying and impregnation of the capacitor are performed.

The reasons that prevent the expected technical result from being obtained include the use of a metal casing of the capacitor and a paper dielectric, which has a relatively low electrical strength. For each capacitor with different operating parameters, it is necessary to determine a new number of sections, make a new metal case and ceramic insulators, which are used for the specified voltage.

З A known method of manufacturing high-voltage pulse capacitors with a paper dielectric |Kuchynskyi G.S. High-voltage impulse capacitor - L.: Znergia, 1973. - 176 s)|, in which, based on the specified operating parameters of the capacitor and the overall dimensions of the insulating case of the capacitor, the paper dielectric of the section is selected, the dimensions of the section and the total number of sections are determined, the number of sections in group and the number of groups of sections, then they wind the sections, assemble them into a package, in which the sections are electrically connected to each other in parallel into groups of sections, and the groups of sections are connected to each other in series, install the package of sections in the insulating case of the capacitor and connect it to the high-voltage terminals of the capacitor, hermetically connect the cover to the capacitor body, perform thermovacuum drying and impregnation of the capacitor. To create capacitors with other operating parameters (capacity), another liquid seeping dielectric is used, which has a higher relative dielectric constant.

The features that coincide with the essential features of the claimed method are as follows - first, based on the specified operating parameters of the capacitor and the overall dimensions of the insulating casing of the capacitor, the organic dielectric of the section is selected, the dimensions of the section and the total number of sections, the number of sections in a group and the number of groups are determined sections, then they wind the sections, assemble them into a package, in which the sections are electrically connected to each other in parallel in groups of sections, and the groups of sections are connected to each other in series, install the package of sections in the insulating case of the capacitor and connect it to the high-voltage terminals of the capacitor, hermetically connect the cover to the capacitor body, perform thermovacuum drying and impregnation of the capacitor.

The reasons that prevent the expected technical result from being obtained include the use of paper dielectric, which has insufficient high electrical strength, and the use of several types of liquid dielectric.

The useful model is based on the task of improving the method of manufacturing a number of high-voltage pulse capacitors by using a new type of dielectric and changing the number of groups of sections in a package and the number of sections in a group, which will allow to obtain capacitors with the same insulating case that have different operating parameters, and due to this to reduce the time and cost of manufacturing single-row capacitors.

The problem is solved by the fact that in the method of manufacturing a series of high-voltage bo-pulse capacitors, in which, based on the specified operating parameters of the capacitor and overall dimensions of the insulating housing of the capacitor, the organic dielectric of the section is selected, the dimensions of the section and the total number of sections are determined, the number of sections in the group and the number of groups of sections, then they wind the sections, assemble them into a package, in which the sections are electrically connected to each other in parallel into groups of sections, and the groups of sections are connected to each other in series, install the package of sections in the insulating case of the capacitor and connect it with high-voltage terminals of the capacitor, hermetically connect the lid to the capacitor body, perform thermovacuum drying and impregnation of the capacitor, in which, according to a useful model, keeping constant the calculated total number of sections and the magnitude of the electric voltage on each group of sections, change the number of serially connected groups of sections and of parallel-connected sections in a group when placing them in this insulating case, while the dielectric consisting of three layers of a polymer film is used as an organic dielectric of the sections.

The cause-and-effect relationship between the set of declared signs and the technical result is as follows.

The signs, while keeping the calculated total number of sections and the magnitude of the electric voltage on each group of sections constant, change the number of serially connected groups of sections and parallel connected sections in a group when placing them in a given insulating case, while the dielectric is used as an organic dielectric of the sections, consisting of three layers of a polymer film allows to reduce the time and costs of manufacturing capacitors of the same row with the same insulating case, which have different operating parameters, to expand the range of high-voltage impulse capacitors, while ensuring high electrical strength of the dielectric sections.

The parallel electrical connection of the sections of the capacitor to each other in groups provides the value of the nominal capacity of the capacitor, and the serial electrical connection of the groups of sections provides its operating voltage. By changing the number of series-connected section groups and parallel-connected sections in the group, capacitors with a new combination of parameters - operating voltage and nominal capacity - are obtained.

The determining value when creating a series of high-voltage pulse capacitors is the value of the electric voltage on each group of sections. Ensuring this value is constant for

From the entire range of capacitors, one section design can be used. The dielectric of the section based on polymer films provides long-term electrical strength at high values of electrical voltage.

As shown by experimental studies conducted at the Institute of Technical Sciences of the National Academy of Sciences of Ukraine, a dielectric based on polymer films impregnated with a low-viscosity dielectric liquid has significantly higher values of short-term and long-term electrical strength than paper and paper-film dielectrics that were previously used in the construction of high-voltage pulse capacitors.

At the same time, it was established that the most optimal design is a dielectric consisting of three layers of a polymer film, for example, polypropylene or a combination of polypropylene and polyethylene terephthalate films. The film dielectric has a higher electrical strength, which allows it to be used at higher values of the working electric field strength compared to paper and paper-film dielectrics.

The method is carried out as follows.

Preliminarily, based on the specified operating parameters of the high-voltage impulse capacitor (voltage, capacity, frequency) and overall dimensions of the insulating case, the dielectric of the capacitor section, consisting of three layers of polymer film, is selected. Based on the performed calculations, the section sizes and the total number of sections are determined. Then the number of sections in a group and the number of groups of sections are determined, based on the fact that when they are electrically connected, the operating parameters of the capacitor are obtained. Sections are wound and assembled into a package, in which the sections are electrically connected in parallel in groups of sections that are connected in series. The assembled package of sections is installed in the insulating case and connected to the high-voltage leads of the capacitor, the lid is hermetically connected to the capacitor case, and thermal vacuum drying and impregnation of the capacitor with a liquid dielectric are performed. Next, to obtain a high-voltage pulse capacitor with other operating parameters based on one insulating case, a new package of sections is assembled, keeping the calculated total number of sections constant. Then the number of serially connected groups of sections and parallel connected sections in the group is changed, keeping a constant value of the electric voltage on each group of sections. A package of sections with a new number of series-connected section groups and parallel-connected sections in a group is installed in the insulating 60 case of the capacitor and the assembly process is continued, while at the end a high-voltage pulsed capacitor with new operating parameters is obtained. By changing the number of series-connected section groups and parallel-connected sections in the group several times in this way, a number of high-voltage pulse capacitors are obtained, which are made on the basis of one insulating case and have the same structural elements.

According to the claimed method, a number of high-voltage pulse capacitors based on one insulating case with an operating voltage from 5 to 150 kV and a nominal capacity from 0.1 to 100 μF were created, the technical characteristics of which are given in the table.

Table

Technical characteristics of capacitors Tiver Ter Dn DR Denne μF KV |kV/mm of the capacitor, mm 1 | 60 60 2|3 30121 4115! 1514 3 39) 5| 1282) 5 | 12 | | BobhiBbh32v iml-60o-0.07. | 60 | about | 125 016 670 20|z3z3Yi and z|20

Where: Or - operating voltage of the capacitor, kV;

Si - the nominal capacity of the capacitor, μF; k - the number of polymer films in the dielectric; dk - nominal thickness of the dielectric, μm;

Os - the amount of electric voltage on each group of sections, kV;

Er - the working intensity of the electric field in the dielectric, kV/mm; n - number of groups of sections; t - number of sections in the group;

M - total number of sections, pcs.

A three-layer organic dielectric based on polypropylene and polyethylene terephthalate polymer films is used as the dielectric of the capacitor sections. In these capacitors, the same dielectric materials (polymer films and impregnating liquid), section construction and structural elements are used, such as the insulating case, cover, high-voltage leads of the capacitor, clamping clamps and cheeks for the package of sections, plug-in current outlets of sections, connecting buses and intergroup insulation in the package.

Thus, the application of the proposed method allows to reduce the time and reduce the costs of manufacturing capacitors of the same row with the same insulating case, which have different operating parameters.

Claims (1)

USEFUL MODEL FORMULA Koo) The method of manufacturing a series of high-voltage pulse capacitors, in which, based on the specified operating parameters of the capacitor and the overall dimensions of the insulating housing of the capacitor, the organic dielectric of the section is selected, the dimensions of the section and the total number of sections, the number of sections in a group and the number of groups of sections are determined , then they wind the sections, assemble them into a package, in which the sections are electrically connected to each other in parallel in groups of sections, and the groups of sections are connected to each other in series, install the package of sections in the insulating case of the capacitor and connect it to the high-voltage terminals capacitor, hermetically connect the lid to the capacitor body, perform thermovacuum drying and impregnation of the capacitor, which differs in that, while keeping the calculated total number of sections and the magnitude of the electric voltage on each group of sections constant, the number of serially connected groups of sections is changed and in parallel with united villages ections in a group when they are placed in this insulating case, while the dielectric consisting of three layers of a polymer film is used as an organic dielectric of the sections. 2222 Kompyuternaverskad Sheverun 3333333 State Intellectual Property Service of Ukraine, str. Urytskogo, 45, m. Kyiv, MSP, 03680, Ukraine SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, m. Kyiv - 42, 01601