CN202332525U

CN202332525U - Split type winding for transformer

Info

Publication number: CN202332525U
Application number: CN2011205027360U
Authority: CN
Inventors: 郑建银; 蒋忠金
Original assignee: NANJING DAQO TRANSFORMER SYSTEMS CO Ltd
Current assignee: NANJING DAQO TRANSFORMER SYSTEMS CO Ltd
Priority date: 2011-12-07
Filing date: 2011-12-07
Publication date: 2012-07-11
Anticipated expiration: 2021-12-07

Abstract

The utility model belongs to the transformer field and particularly relates to a split type winding for a transformer. The split type winding provided by the utility model combines the advantages of two traditional split type windings in structure. Two coils of a secondary winding are wound simultaneously; copper materials of the two coils are separated in an interlayer insulating manner; and the two coils are wound in an overlapped manner, so as to ensure to individually and electrically operate. The insulating radiuses of the two coils are very approximate and can be coupled well, so that the eddy-current loss of a wire stock can be effectively controlled. Wires are lead out from the same sides of the two coils, so that a lead wire structure is convenient to arrange. The split type winding disclosed by the utility model has the beneficial effects of saving the material of the coils, simplifying the lead wire structure and ensuring the properties of the transformer.

Description

A kind of winding of dual low voltage transformer

Technical field

The utility model belongs to field transformer, relates in particular to a kind of winding construction of dual low voltage transformer.

Background technology

The winding construction of traditional dual low voltage transformer mainly contains two kinds, and the axial split formula structure and the width of cloth are to division formula structure, concrete form such as Fig. 1; Its secondary winding is generally low-voltage 400V or 690V; According to the size of transformer capacity, its current value is relatively large, and coil adopts paper tinsel formula winding mostly.

When adopting axial split formula structure (Fig. 1 left hand view), owing to receive the restriction of height, the Copper Foil of winding is thicker; It is bigger influenced by its end field intensity, and the inner eddy current loss of Copper Foil also increases thereupon, causes the part waste of material; And this structure must be designed to upper and lower outlet; For guaranteeing ampere-turn equilibrium, one time winding also need be designed to upper and lower two parts, and pin configuration is also comparatively complicated.

Adopt the width of cloth when division formula structure (Fig. 1 right part of flg), the height of Copper Foil is higher, and thickness can be 1/2 of axial split formula structure; The eddy current loss of Copper Foil obviously reduces; Pin configuration is simplified than the former relatively, but in order to make the resistance value between two windings approaching as far as possible, certainly will will regulate the main empty path distance between each winding; Cause the coiling radius of coil to increase, waste of material is comparatively serious.

According to above analysis, adopt traditional axial or width of cloth all to have some drawbacks to the winding of division formula structure, the space of improvement is all being arranged aspect transformer device structure, the economy.

The utility model content

The purpose of the utility model is to overcome the problems referred to above, provides a kind of and practices thrift coil method, simplifies the winding that pin configuration guarantees the dual low voltage transformer of transformer performance simultaneously.

To achieve these goals, the technical scheme that the utility model adopted is: a kind of winding of dual low voltage transformer is characterized in that: two coil overlapping coilings of secondary winding, separate by layer insulation between two coils, and two coil electric parts are separate.

The described two coil insulation radiuses of the utility model are approaching, intercouple, and reactance is highly equal, and lead-in wire is drawn by the homonymy of two coils.

The utility model has combined the advantage of two kinds of traditional division formula winding constructions, and the coiling simultaneously of two coils of secondary winding separates with layer insulation between the copper material of two coils, and what two coils overlapped is wound on together, guarantees electric aspect independent operating; Because the insulation radius of two coils is very approaching, can be good at coupling, effectively controlled the eddy current loss of wire rod; Outlet is all drawn from above, is convenient to arrange pin configuration.

Description of drawings

Fig. 1 is the winding construction figure of existing transformer dual low voltage transformer;

Fig. 2 is the winding construction figure of the dual low voltage transformer of the utility model;

Wherein, coil on the 1a secondary, 1b secondary lower coil, 2a secondary interior loop, 2b secondary exterior loop, 3 secondary coils insulate between 4 windings.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Fig. 1 is the winding construction figure of existing transformer dual low voltage transformer, and mark among Fig. 1 and Fig. 2 " y " is a secondary coil, and mark " D " is a primary winding; Fig. 1 left side is axial split formula winding construction figure, is made up of coil 1a on the secondary and secondary lower coil 1b; Fig. 1 right side is the width of cloth to division formula winding construction figure, is made up of secondary interior loop 2a and secondary exterior loop 2b.

Fig. 2 is the winding construction figure of the dual low voltage transformer of the utility model, and Fig. 2 left side is the winding construction form, and Fig. 2 right side is the winding structure of secondary winding.According to Fig. 2, a kind of winding of dual low voltage transformer is characterized in that: two coils of secondary winding (being secondary coil 3) overlapping coiling, separate by layer insulation (being to insulate 4 between winding) between two coils, and two coil electric parts are separate; Two coil insulation radiuses are approaching, intercouple, and reactance is highly equal, and lead-in wire is drawn by the homonymy of two coils.

The utility model has combined the advantage of two kinds of traditional division formula winding constructions; Two secondary coils 3 adopt double-deck foil winding equipment when coiling; The coiling simultaneously of two coils of secondary winding reaches turn-to-turn and carries out insulation processing (being to insulate 4 between winding) respectively between two coils, make two coils stressed evenly.What two coils overlapped is wound on together, guarantees electric aspect independent operating.Because the insulation radius of two coils is very approaching, can be good at coupling, effectively controlled the eddy current loss of wire rod, lead-in wire is all drawn from above, is convenient to arrange pin configuration, and lead-in wire is carried out the sequence number mark.

The foregoing description does not limit the utility model in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drops on the protection range of the utility model.

Claims

1. the winding of a dual low voltage transformer is characterized in that: two coil overlapping coilings of secondary winding, separate by layer insulation between two coils, and two coil electric parts are separate.

2. the winding of a kind of dual low voltage transformer according to claim 1, it is characterized in that: described two coil insulation radiuses are approaching, intercouple, and reactance is highly equal, and lead-in wire is drawn by the homonymy of two coils.