Rectangular coil used for transformer

Abstract

The invention discloses a rectangular coil used for a transformer. The rectangular coil comprises a rectangular inner barrel, an inner coil and an outer coil are wound outside the rectangular inner barrel, an insulating layer is arranged between the inner coil and the outer coil, heat-radiating particles are filled in the inner coil and the outer coil, and a reinforcing layer is coated on the outer layer of the outer coil. Due to the heat-radiating particles filled in the inner coil and the outer coil, heat-radiating performance of the transformer coil is greatly improved; due to the reinforcing layer coated outside the outer coil, mechanical strength of the transformer coil is enhanced, the transformer coil can be prevented from being oxidized due to overhigh temperature, and the service life of the transformer coil is prolonged.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a rectangular coil for a transformer. Background technique [0002] In the field of transformer manufacturing, it is generally divided into oil-immersed transformers and dry-type transformers. Dry-type transformers usually refer to epoxy resin dry-type transformers, that is, dry-type transformers that mainly use epoxy resin as insulating materials, mainly including casting type and wrapping type. [0003] However, the heat dissipation effect of the existing transformer coil is not ideal, and the outer layer of the coil is generally wrapped with a tight cloth tape, which has low strength, and the coil is easy to expand and deform, thereby failing. Contents of the invention [0004] The main technical problem to be solved by the invention is to provide a rectangular coil for transformer with simple structure, good heat dissipation effect and high strength. [0005] In order to solve...

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Problems solved by technology

[0003] However, the heat dissipation effect of the existing transformer coil is not ideal. The outer layer of the coil is generally wrapped with a tight cloth tape, which has low strength, and the coil is easy to expand and deform, resulting in failure.

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