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

Abstract

The technical solution of the utility model is to provide a small energy-saving dry-type transformer, which includes an iron core, and a low-voltage coil is respectively sleeved on the three columns of the iron core, and a high-voltage coil, a low-voltage coil and a high-voltage coil are placed outside each low-voltage coil The body is insulated and fixed, and the iron core is connected with high-voltage lead wires and low-voltage lead wires. The high-voltage lead wires and low-voltage lead wires are fixed and supported by insulators. It is characterized in that the longitudinal sections of the low-voltage coils, high-voltage coils and iron cores are all rectangular. The utility model has the advantages that it can greatly reduce the amount of materials used, greatly reduce the volume of the transformer, reduce the product cost, and reduce the loss of the iron core at the same time. It is a small energy-saving dry-type transformer.

Description

A small energy-saving dry-type transformer

technical field

The utility model relates to a small energy-saving dry-type transformer, which is used in a power system and belongs to the technical field of transformers.

Background technique

The main components of the currently used dry-type voltage transformer are composed of iron core assembly, coil, body insulation, lead wire, and final assembly. As shown in Figure 1, in the existing dry-type voltage transformer, the three-phase coil and iron core are usually composed of high-voltage coil 1, low-voltage coil 2 and iron core 3, and high-voltage coil 1, low-voltage coil 2 and iron core 3 are circular

The above-mentioned dry-type voltage transformer has the following disadvantages: 1. The main materials of the circular structure transformer are copper and silicon steel sheets, which correspondingly increase the consumption of materials for the production of the transformer. 2. The volume of the circular structure transformer is relatively large, and the material consumption of the protective shell and the iron core clip also increases accordingly.

Contents of the invention

The purpose of the utility model is to provide an energy-saving dry-type transformer which not only saves the consumption of raw materials, but also reduces the no-load loss of the transformer, and at the same time reduces the volume of the transformer.

In order to achieve the above purpose, the technical solution of the utility model is to provide a small energy-saving dry-type transformer, which includes an iron core, and the low-voltage coils are respectively sleeved on the three columns of the iron core, and there is a high-voltage coil outside each low-voltage coil. The low-voltage coil and the high-voltage coil body are insulated and fixed, and the iron core is connected with a high-voltage lead wire and a low-voltage lead wire. The high-voltage lead wire and the low-voltage lead wire are fixed and supported by insulators. The feature is that the longitudinal sections of the low-voltage coil, high-voltage coil and iron core are all rectangular. .

Preferably, the low-voltage coil and the high-voltage coil have the same structure, including an inner-wrapped insulating grid cloth and an outer-wrapped insulating grid cloth, and a coil wound by a wire is arranged between the inner-wrapped insulating grid cloth and the outer-wrapped insulating grid cloth , Interlayer insulation is provided between adjacent wires, and epoxy resin mixture is poured between the inner insulating mesh cloth and the outer insulating mesh cloth.

The cross-section of the iron core of the utility model adopts a rectangular structure. In the case of the same cross-section, the rectangle can reduce the distance between the centerlines of adjacent iron cores, reduce the height of the iron core, and shorten the length of the magnetic circuit, saving iron. Core consumption reduces no-load loss. Compared with the iron core with circular stepped cross-section, the filling factor is improved, and the average radius of the coil is reduced, that is, the amount of copper wire is reduced.

The utility model has the advantages that it can greatly reduce the amount of materials used, greatly reduce the volume of the transformer, reduce the product cost, and reduce the loss of the iron core at the same time. It is a small energy-saving dry-type transformer.

Description of drawings

Figure 1 is a schematic diagram of the original three-phase coil and iron core structure;

Fig. 2 is a structural schematic diagram of a small energy-saving dry-type transformer provided by the utility model;

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

Fig. 4 is a sectional view along the line A-A of Fig. 2 .

Detailed ways

In order to make the utility model more obvious and understandable, a preferred embodiment is described in detail as follows in conjunction with the accompanying drawings.

As shown in Figure 2 and Figure 3, a small energy-saving dry-type transformer provided by the utility model includes an iron core 4, and low-voltage coils 8 are respectively sleeved on three columns of the iron core 4, and each low-voltage coil 8 is covered with A high-voltage coil 5, low-voltage coil 8 and high-voltage coil 5 body insulation 6 are fixed, and a high-voltage lead 7 and a low-voltage lead 9 are connected on the iron core 4, and the high-voltage lead 7 and the low-voltage lead 9 are fixedly supported by insulators 10. Referring to FIG. 4 , the longitudinal sections of the low-voltage coil 8 , the high-voltage coil 5 and the iron core 4 are all rectangular.

The low-voltage coil 8 and the high-voltage coil 5 are cast in vacuum equipment with wires and insulating materials. There is interlayer insulation between the adjacent conductors between the cloth and the outer insulating mesh cloth, and epoxy resin mixture is poured between the inner insulating mesh cloth and the outer insulating mesh cloth.

The three-phase coil and the iron core of the utility model adopt a rectangular structure, and the silicon steel sheet of the iron core has only one shape, and the material utilization rate is relatively high.

The three-phase coil and the iron core of the present utility model adopt a rectangular structure, and in the case of the same section, the distance M02 between the centerlines of the adjacent iron cores 4 of the rectangular structure is the centerline of the adjacent iron cores 3 of the circular structure The distance between them is 0.7 times that of M02, and at the same time, the widest piece of the main stage of the rectangular structure iron core is only about 0.5 times that of the widest piece of the circular structure, so the length and height of the iron core are reduced, and the length of the magnetic circuit is shortened. It saves the amount of iron core, reduces the no-load loss, and reduces the volume of the transformer.

Claims (2)

1. A small energy-saving dry-type transformer, including an iron core (4), a low-voltage coil (8) respectively sleeved on three columns of the iron core (4), and a high-voltage coil ( 5), low-voltage coil (8) and high-voltage coil (5) body insulation (6) fixed, high-voltage lead (7) and low-voltage lead (9) are connected to the iron core (4), high-voltage lead (7) and low-voltage The lead wire (9) is fixedly supported by an insulator (10), and is characterized in that the longitudinal sections of the low-voltage coil (8), the high-voltage coil (5) and the iron core (4) are all rectangular. 2. A small energy-saving dry-type transformer according to claim 1, characterized in that: the structure of the low-voltage coil (8) and the high-voltage coil (5) are the same, including inner insulation grid cloth and outer insulation mesh Grid cloth, the coil wound by wire is set between the inner insulating mesh cloth and the outer insulating mesh cloth, and there is interlayer insulation between adjacent wires, and the inner insulating mesh cloth and the outer insulating mesh cloth Pouring with epoxy resin mix.

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