The new electrotechnologies based on high current pulse discharge, flowing through the coil of inductance, gas or liquid has received further development. To the mentioned above technologies we can add magnetic punching, crushing of rock, clearing the metal casting and so on. Laser technologies which are used both in industry and in medicine are being more developed.
In these technologies pulse high-voltage capacitors are used as one the basic elements of equipment. The requirements of increasing the specific energy, the working frequency of capacitors, the decreasing of tg ? of their inductance and internal resistance of the capacitors are demanded nowadays. It is impossible to answer these requirements completely with the application of the traditional paper-oil isolation for pulse capacitors, because of rather high dielectric losses.
The innovating work on the creation of the series of film pulse capacitors with the specific energy of 0,1; 0,2; 0,3 J/g, low-inductance high currents capacitors and low-inductance high-frequency capacitors for laser technologies has been carried on by the company « Russian Technological Group » together with All-Russia electrotechnical institute.
The most important part of this work was the research and deeper understanding of the physical mechanisms determining the ageing of film capacitors during their operation with the high voltage of electric field, consisting of 250 … 300 kV/mm. Carried out researches allowed to begin the development of the technology of creation the film capacitors of high specific energy with the more proved position. The basic features of this technology were defined in the process of research and consist of the following:
1) Use of optimum factor press of sections in a package and the elimination of the possibility of the excessive press;
2) Elimination of sources of additional pollution of a film at manufacturing sections and assembly of dry packages (winding sections in a "clean" room, observance of industrial hygiene, etc.);
3) Elimination of probable pollution of the isolation of the capacitor during its impregnation due to transition from a group method of impregnation to individual and the exception of a reuse of a liquid after clearing it by the sorbents;
4) Careful vacuum drying film isolation of the capacitor within 48 hours at temperature 95-105 0Ñ;
5) Careful vacuum-thermal preparation of a filled in liquid with the purpose of elimination of the dissolved moisture;
6) Refusal of application stabilizing epoxy additives.
It is necessary to note, that the mentioned above technology as a whole is directed on the elimination of the dust content pollution, a moisture and stabilizing additives from capacitor isolation. Such requirements the technology of manufacture of capacitors are not new. However the strict observance of these requirements at manufacturing pulse film capacitors as our researches, have shown are a lot higher, than at manufacture of capacitors with paper-castor isolation.
On the basis of the carried out researches and the developed technology a series of pulse capacitors KPI and KPI1 type has been created.