Method for replacing double/quadruple helix coil of transformer with long-circle section

Abstract

The invention discloses a method for replacing a double / quadruple helix coil of a transformer with a long-circle section, comprising a double helix and a quadruple helix. The replacing method of the double helix comprises the following steps: (1) a plurality of leads wound in parallel are axially divided into two groups of line cakes, and the leads of each group of the line cake are overlapped together to wind along an iron core with the long-circle section; (2) the leads of two groups of line cakes replace once when winding at least one circle, and the replacement is evenly carried out on two semi-circular parts at the section of the coil at interval; and (3) the arrangement position of the leads of each group of the line cake is same as the original arrangement position after the times of the replacement same as the total number of the parallel wound leads are carried out so as to axially lead out two groups of the line cakes. The replacing method of the quadruple helix comprises a step of replacing according to the replacing method of the double helix. A crosswise size in a direction of a short axle of the coil can be completely controlled without bouncing so as to completely replace, the lengths of the parallel-connected leads are same in the same magnetic field, no circulating current is generated among the leads, and the coil has no additional loss due to the replacement, thereby the invention ensures favorable electric performance of the transformer.

Description

technical field [0001] The invention relates to the technical field of power transformation or power distribution devices, in particular to a transposition method for double-helix or quadruple-helix oblong cross-section transformer coils. Background technique [0002] In the technical field of power transformation or power distribution equipment, according to the size of the transformer capacity, its internal coil structure is also different. In medium and small-capacity transformers, the coil structure usually adopts layered coils. Generally, it is divided into single winding and multiple windings. Single winding coils are suitable for small current products, and multiple windings are suitable for large current products. Current products, but because the number of parallel windings in the width direction cannot exceed 2, some high-current products lead to too many wires wound in parallel in the axial direction, so many products have been improved. Chinese invention patent ...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a transposition method for double / quadruple helix oblong cross-section transformer coils, thereby effectively solving the problem of transposition of oblong cross-section coils and the problem that the geometric dimension of the short-axis direction of the coil is out of tolerance. Achieve electrical performance requirements while reducing manufacturing costs

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