CN220933876U - Large iron yoke iron core structure of distribution transformer - Google Patents

Abstract

The utility model discloses a large iron yoke iron core structure of a distribution transformer, which relates to the technical field of distribution transformers and comprises three iron columns and two iron yokes, wherein one iron column is arranged at the middle part of each iron yoke, two iron columns are symmetrically arranged at the two ends of each iron yoke along the center of each iron yoke, and the iron columns and the iron yokes are connected to form an iron core.

Description

Large iron yoke iron core structure of distribution transformer

Technical Field

The utility model relates to the technical field of distribution transformers, in particular to a large iron yoke iron core structure of a distribution transformer.

Background

At present, the large iron yoke iron core structure of the distribution transformer adopts a multi-stage large yoke iron core section structure, and compared with a common iron yoke iron core structure transformer, the multi-stage large yoke iron core structure has the advantages that the purpose of reducing no-load loss is achieved by increasing the iron yoke area and reducing the magnetic flux density on the premise of not increasing the core column section, namely not increasing the copper consumption of a coil, but the no-load loss is increased only by simply increasing the iron yoke section, the process coefficient in the production process is increased, the no-load loss coefficient is higher, no-load loss is increased due to the increase of the no-load loss coefficient, and the effect of reducing the cost of the transformer by using the multi-stage large yoke structure is not ideal.

Based on the above, the large iron yoke iron core structure of the distribution transformer is provided, so that the defects of the existing device can be overcome.

Disclosure of utility model

The utility model aims to provide a large iron yoke iron core structure of a distribution transformer, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The large iron yoke iron core structure of the distribution transformer comprises three core columns and two iron yokes, wherein one core column is arranged at the middle part of each iron yoke, two core columns are symmetrically arranged at two ends of each iron yoke along the center of each iron yoke, and the core columns and the iron yokes are connected to form an iron core.

Based on the technical scheme, the utility model also provides the following optional technical schemes:

Preferably: the core column comprises a core column main silicon steel sheet, and a plurality of core column secondary silicon steel sheets are respectively attached to two sides of an iron yoke of the core column main silicon steel sheet in sequence.

Preferably: the iron yoke comprises an iron yoke main silicon steel sheet, and a plurality of iron yoke secondary silicon steel sheets are sequentially attached to two sides of the iron yoke main silicon steel sheet.

Preferably: the section of the iron core adopts a secondary large yoke or a tertiary large yoke.

Preferably: the cross-sectional area of the mandrel is constant.

Preferably: the increase of the widths of all stages of the iron yoke corresponds to the widths of all stages of the core column.

Preferably: the span of each stage increase of the core is smaller.

Compared with the prior art, the utility model has the following beneficial effects:

1. According to the utility model, the increase of the widths of all stages of iron yokes is determined according to the widths of iron core column sheets, a two-stage or three-stage large iron yoke is adopted, and the iron core section structure with one stage larger than the one stage is adopted, so that the area of the iron yoke is increased under the condition that the section of the iron core column is not increased, the purpose of increasing the section of the iron yoke to reduce no-load loss is realized, the process coefficient in the production process is consistent with that of an equal yoke iron core, and the transformer cost is optimal under the condition of equal transformer loss requirement.

2. According to the utility model, through the increase of each stage of small span of the iron yoke, the air gap between the iron core sheet splicing is reduced, the consumption of magnetomotive force is reduced, the no-load loss coefficient is reduced, and the effect that the no-load loss process coefficient is the same as that of an equal yoke iron core structure is achieved.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Figure 2 is a schematic representation of a cross-section of a stem of the present utility model.

Fig. 3 is a schematic view of a cross section of an iron yoke according to the present utility model.

Reference numerals annotate: the core column 1, the iron yoke 2, the core column main grade silicon steel sheet 11, the core column secondary grade silicon steel sheet 12, the iron yoke main grade silicon steel sheet 21 and the iron yoke secondary grade silicon steel sheet 22.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

In one embodiment, as shown in fig. 1-3, the large iron yoke iron core structure of the distribution transformer comprises three core columns 1 and two iron yokes 2, wherein one core column 1 is arranged in the middle of each iron yoke 2, two core columns 1 are symmetrically arranged at two ends of each iron yoke 2 along the center of each iron yoke 2, and the core columns 1 and the iron yokes 2 are connected to form an iron core.

The core column 1 comprises core column main grade silicon steel sheets 11, a plurality of core column secondary grade silicon steel sheets 12 are respectively attached to two sides of the core column main grade silicon steel sheets 11 in sequence, and one core column main grade silicon steel sheet 11 and the plurality of core column secondary grade silicon steel sheets 12 are overlapped to form the core column 1.

The iron yoke 2 comprises iron yoke main grade silicon steel sheets 21, a plurality of iron yoke secondary grade silicon steel sheets 22 are sequentially attached to two sides of the iron yoke main grade silicon steel sheets 21, and one iron yoke main grade silicon steel sheet 21 is overlapped with the plurality of iron yoke secondary grade silicon steel sheets 22 to form the iron yoke 2.

The section of the iron core adopts a secondary large yoke or a tertiary large yoke, and the no-load loss is reduced by reducing the magnetic flux density, so that the no-load loss process coefficient is the same as that of an equal yoke iron core structure.

The cross-sectional area of the stem 1 is unchanged, and the coil copper consumption can be not increased.

The increase condition of the width of each stage of the iron yoke 2 corresponds to the width of each stage of the core column 1, so that the splicing gap can be reduced, the magnetic flux density can be reduced, and the no-load loss can be reduced.

The span of each stage of the iron core is smaller, so that the air gap between the iron core sheet splicing can be reduced, the consumption of magnetomotive force is reduced, and the no-load loss coefficient is reduced.

When the transformer is used, no-load loss is reduced by only increasing the section of the iron yoke, the process coefficient in the production process is consistent with that of an equal yoke iron core, the influence of different sections of the iron yoke on the no-load loss of the transformer and the influence of the iron yoke sections on the whole cost of the transformer are comprehensively considered, the section of the iron yoke of the transformer is optimized, the process coefficient in the production process is not increased under the requirement of reducing the no-load loss by increasing the section of the iron yoke, the transformer cost under the condition of equal transformer loss requirement is optimal, the optimal design of the small oil immersed type distribution transformer is facilitated, and compared with the traditional large iron yoke iron core section structure, the transformer has obvious advantages in the aspects of comprehensive technical performance index, economic index, processing technology and the like.

The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (1)

1. The large iron yoke iron core structure of the distribution transformer comprises three iron columns (1) and two iron yokes (2), and is characterized in that the middle part of each iron yoke (2) is provided with one iron column (1), two ends of each iron yoke (2) are symmetrically provided with two iron columns (1) along the center of each iron yoke (2), and the iron columns (1) and the iron yokes (2) are connected to form an iron core;

The core column (1) comprises a core column main silicon steel sheet (11), and a plurality of core column secondary silicon steel sheets (12) are respectively and sequentially attached to two sides of the core column main silicon steel sheet (11);

The iron yoke (2) comprises an iron yoke main grade silicon steel sheet (21), and a plurality of iron yoke secondary silicon steel sheets (22) are sequentially attached to two sides of the iron yoke main grade silicon steel sheet (21);

the section of the iron core adopts a secondary large yoke or a tertiary large yoke;

The cross-sectional area of the stem (1) is unchanged;

The increasing condition of the width of each stage of the iron yoke (2) corresponds to the width of each stage of the core column (1);

the span of each stage increase of the core is smaller.