Short-circuit-resisting transformer coils and preparation method therefor

Abstract

The invention relates to short-circuit-resisting transformer coils. The short-circuit-resisting transformer coils comprise low-voltage coils, main hollow channel insulating part and high-voltage coils; the short-circuit-resisting transformer coils are characterized by further comprising a first insulating band for banding the last several layers of windings of the low-voltage coils, and the first several layers of windings of the main hollow channel insulating part and the high-voltage coils into one body. Meanwhile, the invention also discloses a preparation method for the short-circuit-resisting transformer coils. By adoption of the structure, the main hollow channel insulating distance is effectively controlled, and the main hollow channel insulating distance is not changed too much caused by the short circuit of the transformer, so that the overall firmness of the transform coils is strengthened, and the short-circuit-resisting capability of the transformer is enhanced; compared with the existing technological process, the technological process in the preparation method provided by the invention is not changed too much; however, the preparation method is simple and effective; the cost of the manufactured transformer is similar to that in the prior art, so that the transformer coils can be produced in a large-scale manner; and the short-circuit-resisting capability of the manufactured transformer is obviously better than that of a similar transformer in the prior art, therefore, the market competitiveness of the transformer coils is improved to a certain degree.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to an anti-short circuit transformer coil, and also relates to a preparation method of the transformer coil. Background technique [0002] The transformer is an important part of the power grid. It includes a core and a coil. The coil is the core part of the transformer. The coil is composed of at least two coils, a low-voltage coil and a high-voltage coil. Empty passage, the insulation provided in the main passageway is the insulation of the main passageway. Such as the structure disclosed in the "Transformer Short-circuit Resistant Rectangular Coil" with the Chinese patent authorization announcement number CN202189661U. In this document, the main airway insulation includes a hard paper spacer, and the hard paper spacer is filled with chopped glass strands. felt, and an epoxy fiberglass ribbon is wound around the outer side of the high-voltage coil along the circumference. A...

AI Technical Summary

Problems solved by technology

However, due to the limited adhesion of the insulating paint and the clamping force of the clamp, the coil will still be deformed during a short circuit, and the main empty channel will still increase significantly

[0004] Therefore, the stability of the existing transformer coils still needs to be further improved.

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