CN202142387U

CN202142387U - Iron core structure of transformer

Info

Publication number: CN202142387U
Application number: CN201120253471U
Authority: CN
Inventors: 黄书胡
Original assignee: GUANGDONG ZHONGPENG ELECTRICAL CO Ltd
Current assignee: GUANGDONG ZHONGPENG ELECTRICAL CO Ltd
Priority date: 2011-07-18
Filing date: 2011-07-18
Publication date: 2012-02-08
Anticipated expiration: 2021-07-18

Abstract

The utility model discloses an iron core structure of a transformer, which can effectively reduce the no-load consumption of a transformer. The key points of the technical scheme are as follows: the iron core structure of the transformer comprises an iron core column and an iron yoke; and the sectional area of the iron yoke is larger than that of the iron core column. The section of the iron core column is long circular, and the section of iron yoke is a D-shaped structure; the D-shaped structure is formed in a way that the long circular shape is divided into two halves along a symmetry axis, and one half is extended along the direction of a short symmetry axis until being on a same plane with the highest point of the short symmetry axis. By changing the sections of the iron yoke and the iron core column, the structures of the two are different. The design causes the area of the iron yoke to be enlarged, and the magnetic density is reduced, therefore, unit consumption is reduced in low magnetic density, and the no-load consumption of the transformer is effectively reduced. Simultaneously, the iron core can also save the weight of copper conductors and no-load consumption caused by conductor resistance, thus reducing the production cost of the transformer.

Description

A kind of core structure of transformer

Technical field

The utility model relates to field of electrical equipment, more particularly, relates to a kind of core structure of transformer.

Background technology

The magnetic conductor of iron core is the magnetic circuit of transformer, and it is to convert the electric energy of primary circuit to magnetic energy, again magnetic energy is converted into the electric energy of secondary circuit, is a kind of media of power conversion.The iron core of transformer must have high permeability.Under certain magnetic field intensity, magnetic permeability is high more, transmit under the condition of equivalent magnetic flux, and the required silicon steel sheet and the volume of iron core are just few more, and the weight of product is relatively just light more.And core volume reduces to practice thrift lead and reduces the caused heating loss of conductor resistance; Under certain frequency and magnetic flux density, has simultaneously lower iron loss; The caused loss of silicon steel sheet (magnetic hysteresis loss and eddy current loss) that is Unit Weight is low; Can reduce the total losses of transformer like this, improve the efficient of transformer.

The different structure of iron core all influences very big to the volume of iron core, the silicon steel sheet that needs and loss parameter, thereby influences the total losses and the operating efficiency of transformer.The core structure that traditional transformer all adopts the iron yoke to equate with the iron core column sectional area, the cross section structure of iron yoke is the same with the iron core column cross section structure to be Long Circle.As shown in Figure 2, this structure does not make full use of the space of iron yoke, and all stepped distribution in the both sides of core lamination stack makes the sectional area of iron yoke less, causes the close height of magnetic of iron yoke post, and the zero load consume of transformer is big.Therefore, at present need be a kind of under the situation that does not change external diameter in the transformer coil, can effectively reduce the core structure of transformer noload losses.

The utility model content

The purpose of the utility model is to overcome shortcoming of the prior art with not enough, and a kind of core structure that can effectively reduce the no-load transformer consume is provided.

In order to achieve the above object, the utility model is achieved through following technical proposals: a kind of core structure of transformer comprises iron core column and iron yoke; The sectional area of said iron yoke is greater than the sectional area of iron core column.

More particularly, the cross section of said iron core column is a Long Circle, and the cross section of said iron yoke is a D shape structure; The said Long Circle of said D shape structure is positioned at same horizontal plane along the wherein half the direction extension along minor axis K of longitudinal axis L dimidiation, general until the peak with said minor axis K and forms.

Stacked the forming of said iron yoke core lamination stack identical by shape, that vary in size.

The inside side of core lamination stack on the said iron yoke is the wide stepped distribution in narrow centre, both sides, and an outside side is maintained at the same horizontal plane.

The design principle of the utility model: the utility model is used for the sheet of core lamination stack of stacked iron yoke through increase wide; Make a side of core lamination stack be positioned at same horizontal plane simultaneously; Make the core window upper and lower end face form a plane like this, the cross section of iron yoke is a D shape structure.Design has increased the sectional area of iron yoke like this, thereby makes the close reduction of yoke post magnetic, effectively reduces the zero load consume of transformer.

Compared with prior art, the utlity model has following advantage and beneficial effect:

1, the utility model makes both structures inequality through changing the cross section of iron yoke and iron core column.Design increases the area of iron yoke like this, the close reduction of magnetic, thus specific loss reduces under low magnetic density, has effectively reduced the no-load loss of transformer.The iron core of the utility model also can be practiced thrift copper conductor weight and reduce the caused load loss of conductor resistance simultaneously, thereby reduces the production cost of transformer.

2, the cross section of the D shape iron yoke structure of the utility model iron core and the supporting surface of coil become a plane, and design guarantees that coil is had enough big Area of bearing like this, has strengthened the fastening of transformer inner body coil, thereby strengthens the anti-short circuit capability of transformer.

Description of drawings

Fig. 1 is the iron yoke sectional view of traditional transformer iron core;

Fig. 2 is the structural representation of the utility model transformer core;

Fig. 3 is along the iron yoke sectional view of B-B direction among Fig. 2;

Fig. 4 is along the iron core column sectional view of A-A direction among Fig. 2.

Embodiment

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

Embodiment one

Below be that the oil-immersed power transformer of S11-1600/10 is that example describes with the model.

The structural representation of the utility model transformer core is as shown in Figure 2, wherein Fig. 3 be among Fig. 2 along the iron yoke sectional view of B-B direction, Fig. 4 is along the iron core column sectional view of A-A direction among Fig. 2.The core structure of this transformer comprises iron core column 1 and iron yoke 2; The sectional area of said iron yoke 2 is greater than the sectional area of iron core column 1.

More particularly, the cross section of said iron core column 1 is a Long Circle, and the cross section of said iron yoke 2 is a D shape structure; The said Long Circle of said D shape structure is positioned at same horizontal plane along the wherein half the direction extension along minor axis K of longitudinal axis L dimidiation, general until the peak with said minor axis K and forms.

Core lamination stack 3 stacked the forming that said iron yoke 2 is identical by shape, vary in size.

Core lamination stack 3 inside sides on the said iron yoke 2 are the wide stepped distribution in narrow centre, both sides, and an outside side is located on the same horizontal plane.

The transformer fe cored structure of the utility model is except the no-load loss that reduces transformer effectively, and the cross section D shape structure of iron yoke 2 plays the fastening effect of good support to coil.Shown in Fig. 3 the utility model iron yoke sectional view; Compare with the iron yoke sectional view of Fig. 1 traditional transformer iron core; The cross section is that the area of coil support face of the iron yoke 2 of D shape structure has increased; Design guarantees that coil is had enough big Area of bearing like this, has strengthened the fastening of transformer inner body coil, thereby strengthens the anti-short circuit capability of transformer.

Model is the design that the oil-immersed power transformer of S11-1600/10 adopts this core structure, and transformer noload losses decreases drastically.Under the transformer normal operation, transformer noload losses has reduced by 4.5%, and production cost has reduced by 3%.

Embodiment two

In the present embodiment, model is that the oil-immersed power transformer of S11-200/10 adopts the core structure identical with embodiment one.Under the transformer normal operation, transformer noload losses has reduced by 3.2%, and production cost has reduced by 1.8%.

The foregoing description is the utility model preferred implementation; But the execution mode of the utility model is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit and the principle of the utility model, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within the protection range of the utility model.

Claims

1. the core structure of a transformer comprises iron core column and iron yoke; It is characterized in that: the sectional area of said iron yoke is greater than the sectional area of iron core column.

2. the core structure of transformer according to claim 1, it is characterized in that: the cross section of said iron core column is a Long Circle, the cross section of said iron yoke is a D shape structure; The said Long Circle of said D shape structure is positioned at same horizontal plane along the wherein half the direction extension along minor axis K of longitudinal axis L dimidiation, general until the peak with said minor axis K and forms.

3. according to the core structure of the said transformer of claim 2, it is characterized in that: stacked the forming of said iron yoke core lamination stack identical by shape, that vary in size.

4. according to the core structure of the said transformer of claim 3, it is characterized in that: the inside side of the core lamination stack on the said iron yoke is the wide stepped distribution in narrow centre, both sides, and an outside side is maintained at the same horizontal plane.