Novel high tension coil for dry transformer and manufacturing method for novel high tension coil

Abstract

The invention discloses a high tension coil for a transformer. The high tension coil has a multi-section cylinder structure and is wound on support strips which are uniformly distributed on an insulation cylinder. All sections of the coil are isolated from one another by annular insulation plates and air; an insulation grid plate is wrapped outside each section of the coil; and the upper and lower ends of the coil are provided with insulation end rings and positioned by the support strips and gaskets which are sleeved on the support strips. The annular insulation plates are clamped and positioned by the support strips and the gaskets which are sleeved on the support strips so as to form radial air channels. The cross section of the cylinder coil is circular, rectangular or oblong. The high tension coil has the advantages of a cake coil, namely the high tension coil radiates heat well, and has strong overload capacity, and materials can be recycled; and the high tension coil also has the advantages of simple structure and mould and short production cycle, can be easily obtained through winding without casting, and has a flat appearance and insulation protection layers of an encapsulated coil, integrates the advantages of the encapsulated coil and a non-encapsulated coil, and is very suitable for the dry transformer.

Description

technical field [0001] The invention relates to a novel high-voltage coil structure of a dry-type transformer, which belongs to the technical field of electric equipment. Background technique [0002] Dry-type transformer high-voltage coils generally adopt a non-encapsulated pie coil structure or an encapsulated multi-segment cylindrical structure. The advantages of non-encapsulated pie coils are good heat dissipation, easy decomposition after service life, and relatively simple manufacturing process. The disadvantages are low window filling coefficient, large coil volume, complex coil structure, difficult winding, and poor coil protection performance. The advantages of the encapsulated multi-segment cylindrical coil are good coil protection performance, simple coil structure, and high mechanical strength. The disadvantages are poor heat dissipation, casting after coil winding, so the process is relatively complicated, the production cycle is long, and post-treatment is diff...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to: in order to solve the performance problems of the above two dry-type transformer high-voltage coils and the production problems of difficult coil winding or long production cycle, combine the performance of the above two coils and the advantages of the manufacturing process, Overcome the shortcomings in the performance of the coil and the manufacturing process, so that the product has good heat dissipation, good protection performance, good electrical performance, easy production, short production cycle, easy to decompose after service life, energy saving and environmental protection

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