CN202285190U

CN202285190U - Small-sized energy-saving dry-type transformer

Info

Publication number: CN202285190U
Application number: CN201120382539XU
Authority: CN
Inventors: 柳生旺
Original assignee: Chint Electric Co Ltd
Current assignee: Chint Electric Co Ltd
Priority date: 2011-10-10
Filing date: 2011-10-10
Publication date: 2012-06-27
Anticipated expiration: 2021-10-10

Abstract

The technical scheme of the utility model provides a small-sized energy-saving dry-type transformer. The dry-type transformer comprises an iron core, low-voltage coils are respectively sleeved on three pillars of the iron core, a high-voltage coil is sleeved outside each low-voltage coil, the low-voltage coils and the high-voltage coils are fixed with the dry-type transformer body in an insulating manner, and the iron core is connected with a high-voltage lead and a low-voltage lead which are fixed and supported by insulators. The small-sized energy-saving dry-type transformer is characterized in that the longitudinal sections of the low-voltage coils, the high-voltage coils and the iron core are all rectangular. The utility model has the advantages that material consumption, the size of the transformer, the product cost and loss of the iron core are all reduced.

Description

A kind of miniature energy-saving dry-type transformer

Technical field

The utility model relates to a kind of miniature energy-saving dry-type transformer, is used for electric power system, belongs to the transformer technology field.

Background technology

The dry type pressure transformer critical piece that uses at present is made up of iron core assembling, coil, the insulation of device body, lead-in wire, general assembly.As shown in Figure 1, in existing dry type pressure transformer, three-phase coil and iron core are by being made up of high-tension coil 1, low-voltage coil 2 and iron core 3 usually, and high-tension coil 1, low-voltage coil 2 and iron core 3 all are circular configuration

Not enough below the dry type pressure transformer of said structure exists: 1, the main material copper of circular configuration transformer and silicon steel sheet consumption are many, have increased accordingly to produce the material that transformer consumed.2, the circular configuration volume of transformer is bigger, and guard shield is also corresponding with iron core folder material usage to be increased to some extent.

Summary of the invention

The purpose of the utility model provides a kind of raw material consumption of both having saved, and has reduced the energy-conservation dry-type transformer of transformer idling load-loss again, has also reduced the volume of transformer simultaneously.

In order to achieve the above object, the technical scheme of the utility model has provided a kind of miniature energy-saving dry-type transformer, comprises iron core; Low-voltage coil is enclosed within respectively on three posts of iron core; Outside each low-voltage coil, be with a high-tension coil, low-voltage coil and the insulation of high-tension coil device body are fixing, on iron core, are connected with high-voltage connection and low-voltage lead; High-voltage connection and low-voltage lead are used the insulator fixed support, it is characterized in that: the longitudinal section of low-voltage coil, high-tension coil and iron core is rectangle.

Preferably; The structure of said low-voltage coil and said high-tension coil is identical; Bag insulation grid cloth and outsourcing insulation grid cloth in comprising; Between bag insulation grid cloth and the outsourcing insulation grid cloth, be provided with layer insulation between the adjacent wires in being located at by the coil of lead coiling, insulating with outsourcing in interior bag insulation grid cloth is cast with mixture of epoxy resins between the grid cloth.

The core section of the utility model adopts rectangular configuration, and under the situation with uiform section, rectangle can be so that the distance between the adjacent core center line reduces; The iron core height reduces simultaneously; And the contraction in length of magnetic circuit, practiced thrift the iron core consumption, reduced no-load loss.Iron core with circular ladder cross section compares, and activity coefficient increases, and reduces the mean radius of coil, has promptly reduced the consumption of copper cash.

The utility model has the advantages that: can reduce material usage greatly, reduce volume of transformer greatly, reduce product cost, reduce the loss of iron core simultaneously, be a kind of small-sized energy-conservation dry-type transformer.

Description of drawings

Fig. 1 is former three-phase coil and core structure sketch map;

A kind of miniature energy-saving dry-type transformer structural representation that Fig. 2 provides for the utility model;

Fig. 3 is the vertical view of Fig. 2;

Fig. 4 is that the A-A of Fig. 2 is to cut-away view.

Embodiment

For making the utility model more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.

Like Fig. 2 and shown in Figure 3; A kind of miniature energy-saving dry-type transformer that the utility model provides comprises iron core 4, and low-voltage coil 8 is enclosed within respectively on three posts of iron core 4; Outside each low-voltage coil 8, be with a high-tension coil 5; Low-voltage coil 8 and high-tension coil 5 device bodies insulation 6 are fixing, on iron core 4, are connected with high-voltage connection 7 and low-voltage lead 9, high-voltage connection 7 and low-voltage lead 9 usefulness insulators 10 fixed supports.In conjunction with Fig. 4, the longitudinal section of low-voltage coil 8, high-tension coil 5 and iron core 4 is rectangle.

Low-voltage coil 8 and high-tension coil 5 are to pour into a mould in vacuum equipment with lead and insulating material to form; Its structure is: bag insulation grid cloth and outsourcing insulation grid cloth in comprising; Be located between interior bag insulation grid cloth and the outsourcing insulation grid cloth by the coil of lead coiling; Be provided with layer insulation between the adjacent wires, between interior bag insulation grid cloth and outsourcing insulation grid cloth, be cast with mixture of epoxy resins.

Three-phase coil of the utility model and iron core adopt rectangular configuration, and iron core silicon steel sheet sheet shape has only a kind of, and stock utilization is than higher.

Three-phase coil of the utility model and iron core adopt rectangular configuration; Under situation with uiform section; Between the center line of the adjacent iron core 4 of rectangular configuration apart from M02 be between the center line of adjacent iron core 3 of circular configuration apart from 0.7 times of M02, about 0.5 times of also having only the wideest of circular configuration of the wideest of rectangular configuration iron core main, so core length simultaneously and reducing highly to some extent; And the contraction in length of magnetic circuit; Practice thrift the iron core consumption, reduced no-load loss, reduced volume of transformer.

Claims

1. miniature energy-saving dry-type transformer; Comprise iron core (4); Low-voltage coil (8) is enclosed within respectively on three posts of iron core (4); Outside each low-voltage coil (8), be with a high-tension coil (5), low-voltage coil (8) and high-tension coil (5) device body insulation (6) are fixing, on iron core (4), are connected with high-voltage connection (7) and low-voltage lead (9); High-voltage connection (7) and low-voltage lead (9) is characterized in that with insulator (10) fixed support: the longitudinal section of low-voltage coil (8), high-tension coil (5) and iron core (4) is rectangle.

2. a kind of miniature energy-saving dry-type transformer as claimed in claim 1; It is characterized in that: the structure of said low-voltage coil (8) and said high-tension coil (5) is identical; Bag insulation grid cloth and outsourcing insulation grid cloth in comprising; Between bag insulation grid cloth and the outsourcing insulation grid cloth, be provided with layer insulation between the adjacent wires in being located at by the coil of lead coiling, insulating with outsourcing in interior bag insulation grid cloth is cast with mixture of epoxy resins between the grid cloth.