Dry-type transformer coil winding structure

By setting up insulating struts in the winding structure of the dry transformer coil, the problems of poor concentricity of the coil and uneven insulation distance are solved, and the short-circuit resistance and production efficiency are improved.

CN222672779UActive Publication Date: 2025-03-25CHINA ELECTRIC EQUIP (JIANGSU) TRANSFORMER TECH CO LTD
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Patent Information

Application Number
CN202420852444.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-23
Publication Date
2025-03-25
Estimated Expiration
2034-04-23

AI Technical Summary

Technical Problem

The existing dry transformer coils have poor concentricity when equipped, resulting in uneven insulation distance, which can easily lead to reduced discharge and heat dissipation effects, and reduced short-circuit resistance.

Method used

A dry transformer coil winding structure is adopted, by providing at least one first insulating strut between the secondary coil and the insulating cylinder, and at least one second insulating strut between the primary coil and the insulating cylinder, ensuring uniformity of the insulation distance.

Benefits of technology

Improve the concentricity of the primary and secondary coils, ensure the uniformity of the insulation distance, improve the mechanical strength and short-circuit resistance of the coil, and reduce production costs and set difficulty.

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Abstract

The utility model discloses a coil winding structure of a dry-type transformer. The coil winding structure comprises a primary coil, a secondary coil and an insulating cylinder, the secondary coil and the insulating cylinder are wound at intervals through at least one first insulating supporting strip; insulating winding is carried out between the primary coil and the insulating cylinder through at least one second insulating supporting strip; and the insulating stays which are uniformly distributed are arranged between the primary coil and the secondary coil, so that the mechanical strength of the coils and the anti-short-circuit capability of the transformer are improved, and the operation is safer. Compared with a traditional structure, the dry-type transformer has the advantages that a formed insulating cylinder is not needed between the primary coil and the secondary coil, the primary coil and the secondary coil can be rolled through insulating plates, independent purchasing is not needed, the purchasing cost is reduced, and the purchasing period is shortened; after the primary coil and the secondary coil are wound together, the transformer is easier to sleeve; the structure of the insulation cushion block is simplified, the production is more convenient, and the production efficiency is improved.
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