Binding method for transformer iron core

Abstract

The invention is concerned with the colligation method of the transformer core that belongs to the dry transformer manufacture field. The steps of the method are: (1) covers the PP paper at the position of the preparing colligation; (2) winds the colligating band of the polyester plastics at the core and penetrates the sealing buckle; (3) embeds the epoxy glass-cloth insulated-board; (4) the colligating band of the polyester plastics tenses and locks by the sealing buckle tightly. The invention uses the colligating band of the polyester plastics to colligate the dry transformer core, which replaces the traditional method that uses the PP paper to colligate core. The invention is simply working procedure, and the noise of the transformer and the wastage of empty load is reduce clearly. The invention is used with the voltage of 6-35kV, the capability of 2500kVA and less dry transformer.

Description

(1) Technical field [0001] The invention relates to a binding method for transformer iron cores, belonging to the field of dry-type transformer manufacturing. (2) Background technology [0002] Dry-type transformer core is an important part of transformer electromagnetic conversion. The tightness of the core laminations and the springback characteristics of the binding materials directly affect the noise and loss of the transformer. At present, traditional dry-type transformer cores are folded in two layers with PP paper and wrapped in continuous half-folds. Due to the large wrapping area and low work efficiency; the thickness of the wrapped PP paper increases, and the heat dissipation of the core is poor; the continuous half-fold wrapping of PP paper is also affected by Affected by the technical level and strength of the operator, the tightness of the core lamination wrapping is not enough, which will easily cause the noise and loss of the transformer to be too large. (3)...

AI Technical Summary

Problems solved by technology

At present, traditional dry-type transformer cores are folded in two layers with PP paper and wrapped in continuous half-folds. Due to the large wrapping area and low work efficiency; the thickness of the wrapped PP paper increases, and the heat dissipation of the core is poor; the continuous half-fold wrapping of PP paper is also affected by Influenced by the technical level and strength of the operator, the tightness of the core lamination wrapping is not enough, which may easily cause the noise and loss of the transformer to be too large

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