Manufacturing method and structure of three-cake entangled reverse unit and transformer

Abstract

The invention provides a manufacturing method of a three-cake entangled reverse unit, and belongs to the technical field of transformers. During winding, 2k wires jointly wind two continuous wire cakes and an entangled wire cake located between the two continuous wire cakes, the 2k wires are wound in parallel to a specified number of turns to obtain a temporary wire cake, the 2k wires are averagely divided into two groups, namely a first group wire and a second group of wires, the first group of wires and the second group of wires are transposed in the left direction and the right direction and temporarily fixed, temporary wire cakes are scattered, wire cakes are turned between the first group of wires and the second group of wires to obtain entangled wire cakes to be fixed, and temporary fixing of the first group of wires and the second group of wires is relieved; the first continuous wire cake and the second continuous wire cake are obtained by winding the two sides of the entangled wire cake to the specified number of turns respectively, the turn number adjusting range is large, large impulse voltage can be borne, the phenomenon of breakdown short circuit is avoided, the coil structure is optimized, and the use safety is improved.

Description

technical field [0001] The invention belongs to the technical field of transformers, and more specifically relates to a manufacturing method and structure of a three-cake entangled inversion unit and a transformer. Background technique [0002] At present, the high-voltage side coil of the transformer is specially equipped with a tap area for connecting the transformer tap changer. During the actual use of the transformer, the tap area will bear a large impact voltage, and even breakdown and short circuit will occur due to excessive voltage. , so generally the coil structure in the tapping area is mostly designed as a fully entangled form, but the fully entangled form is generally a double-cake unit structure, and the adjustment range of the number of turns is small, which is not suitable for transformer products that require a wide range of voltage regulation. When the coil structure is designed as a pure continuous structure, although the number of turns can be adjusted in...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for manufacturing a three-cake entangled reverse unit, aiming to solve the problems of a small adjustment range of the number of turns and a small impact voltage withstand capacity

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