High-capacity transformer coil

Abstract

The invention discloses a high-capacity transformer coil which comprises an upper split coil and a lower split coil, wherein the upper split coil is connected in parallel with the lower split coil, and the upper split coil and the lower split coil are foil type windings. The traditional high-capacity transformer coil is split into an upper part and a lower part, so that the requirement of shaft length of an aluminum winding movement is met, a coil adaptive to a high-capacity transformer can be produced, and various defects of winding the high-capacity transformer coil by using wires are avoided.

Description

technical field [0001] The invention relates to a transformer coil, in particular to a coil for a transformer with relatively large capacity. Background technique [0002] At present, for large-capacity transformers, wire winding is usually used for its coils. The advantage is that the purchase and winding of wire materials are convenient, but the disadvantages are also quite obvious: [0003] (1) When using wire winding, the coil must be transposed, and when the transposition is incomplete, it is easy to cause a large loss; [0004] (2) The welding of the wire-wound coil winding head and the copper discharge wire is difficult to control in design and process, which is the key to affecting the quality of the transformer; [0005] (3) When the low-voltage coil is wound with wire, the low-voltage helix angle is particularly large, which causes a particularly large short-circuit force, and the tightening requirements for the coil are also stricter. [0006] Some manufacturers...

AI Technical Summary

Problems solved by technology

[0003] (1) When using wire winding, the coil must be transposed, and when the transposition is incomplete, it is easy to cause a large loss;

[0004] (2) The welding of the wire-wound coil winding head and the copper discharge wire is difficult to control in design and process, which is the key to affecting the quality of the transformer;

[0006] Some manufacturers use foil windings for large-capacity transformer coils, but it is also difficult to operate due to the following problems:

[0007] (1) Most of the currently used foil winding mandrels are double-foil 1.4m in length. When designing and manufacturing larger-capacity coils, the coil itself exceeds the length of the mandrel and cannot be completed with this equipment;

[0008] (2) Large-capacity low-voltage coil foil windings are usually wound with double foils and welded with large copper or aluminum bars. The strength and other requirements for welding are difficult to guarantee, which affects the processing quality of the coil;

[0009] (3) Foil winding materials for larger capacity transformers, no manufacturer can meet the size requirements for foil materials

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