CN211045222U

CN211045222U - Triangular opening iron core structure

Info

Publication number: CN211045222U
Application number: CN201922226725.3U
Authority: CN
Inventors: 刘成善
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-07-17
Anticipated expiration: 2029-12-12

Abstract

The utility model provides a triangle-shaped open core structure relates to transformer core's technical field, has solved the technical problem that transformer core no-load loss is high and no-load current is big among the prior art. The triangular open iron core structure comprises three single-frame iron cores, and the side surfaces of the different single-frame iron cores are attached to form three iron core columns in pairs. The single-frame iron core comprises an amorphous alloy iron chip and a silicon steel iron chip, and the amorphous alloy iron chip and the silicon steel iron chip are mixed and stacked to form the single-frame iron core. The amorphous alloy iron chip and the silicon steel iron chip are of single-frame structures, and openings are formed in the amorphous alloy iron chip and the silicon steel iron chip. The iron core column formed by stacking the amorphous alloy iron core sheets and the silicon steel iron core sheets can effectively utilize the characteristic of low amorphous alloy loss, and reduce the no-load loss of the iron core column. The iron core structure has the advantages of simple structure and manufacturing process, energy conservation and environmental protection in work, low noise and better short circuit resistance.

Description

Triangular opening iron core structure

Technical Field

The utility model relates to a transformer core's technical field especially relates to a triangle-shaped open core structure.

Background

At present, the materials for manufacturing the transformer core mainly comprise silicon steel sheets and amorphous alloys. The amorphous alloy iron core transformer has obvious energy-saving and environment-friendly performance, and is listed as an environment-friendly and energy-saving product by the nation, so that the amorphous alloy iron core transformer becomes an ideal new-generation amorphous alloy iron core distribution transformer.

The traditional transformer iron core is formed by winding three groups of independent silicon steel sheet strips into three closed wound iron cores, and the three closed wound iron cores are spliced into an iron core structure with a cross section of an approximate circular three-dimensional triangle shape by a 120-degree inclined plane; or three groups of independent silicon steel sheet bars are stacked into three open iron cores, and the three open iron cores are spliced into an iron core structure with the cross section being similar to a circular three-dimensional triangle by using a 120-degree inclined plane.

The traditional transformer iron core is made of silicon steel sheet materials, so that the reduction of the no-load loss value is hindered, and the reduction of the no-load loss value of the transformer iron core is not facilitated; the closed silicon steel sheet winding type iron core is wound, the no-load loss of the silicon steel sheets is greatly increased in the winding process, and the no-load loss and the no-load current are obviously increased due to the fact that seams must be broken on two sides of an iron chip when the open iron core is stacked; and the iron core is of a closed structure, and the coil must be wound on the iron core, so that a plurality of tool equipment are added, and the production efficiency is reduced.

Therefore, it is urgently needed to provide a transformer core capable of reducing no-load loss and no-load current of the core.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an one of them purpose provides a triangle-shaped opening iron core structure, has solved the technical problem that transformer core no-load loss is high and no-load current is big among the prior art. The utility model discloses preferred technical scheme can reach a great deal of beneficial technological effect, specifically see the following explanation.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model discloses a triangle-shaped opening iron core structure, including three single frame iron core, and two liang of laminating in the side of the single frame iron core of difference constitute three iron core post. The single-frame iron core comprises an amorphous alloy iron chip and a silicon steel iron chip, and the amorphous alloy iron chip and the silicon steel iron chip are mixed and stacked to form the single-frame iron core. The amorphous alloy iron chip and the silicon steel iron chip are of single-frame structures, and openings are formed in the amorphous alloy iron chip and the silicon steel iron chip.

According to a further preferred technical solution, the cross-section of the iron core column is circular or regular polygon.

According to a further preferable technical scheme, an included angle between planes of left and right side surfaces of the single-frame iron core is 120 degrees.

According to a further preferred technical scheme, the upper end of the single-frame iron core is an arc-shaped chamfer, and the lower end of the single-frame iron core is a bent chamfer.

According to a further preferred technical scheme, the upper end of the single-frame iron core is a quarter arc-shaped chamfer.

According to a further preferred technical scheme, the angle of the bent chamfer angle at the lower end of the single-frame iron core is 45 degrees.

According to a further preferred technical scheme, the amorphous alloy iron chip and the silicon steel iron chip comprise an upper yoke edge, a lower yoke edge and an iron core edge, wherein the iron core edges on two sides of the two ends of the upper yoke edge and the lower yoke edge are respectively connected to form a single-frame structure.

According to a further preferred technical scheme, the openings are positioned on the upper yoke edges, and the openings on the upper yoke edges of two adjacent layers are arranged in a staggered mode.

According to a further preferable technical scheme, the openings of each layer in the single-frame iron core are distributed in a stepped mode along the length direction of the upper yoke edge.

According to a further preferred technical scheme, the triangular open iron core structure further comprises a binding belt, and the binding belt is wound and fixed on the iron core column.

The utility model provides a triangle-shaped opening iron core structure has following beneficial technological effect at least:

the utility model discloses an amorphous alloy iron core piece and silicon steel iron core piece pile up the characteristics that the iron core post that constitutes can effectively utilize the amorphous alloy loss to hang down, are showing and are reducing iron core post no-load loss. And the triangular open iron core structure formed by mixing and stacking the amorphous alloy iron chip and the silicon steel iron chip has the advantages of simple structure, low manufacturing cost, simple process, simple coil sleeving, low noise, low no-load loss, energy conservation, environmental protection, good short-circuit resistance and the like.

The utility model discloses the cross-section of iron core post is circular among preferred technical scheme's triangle-shaped opening iron core structure for iron core post cross-section filling coefficient improves, and then improves material utilization, and specific utilization ratio that can reach 0.98 embodies for reducing no-load consumption, noise reduction, saving cost.

The utility model discloses the lower extreme of preferred technical scheme's single frame iron core sets up to the chamfer of bending shape, can prevent effectively that the no-load loss of indisputable yoke increases under the metallic glass iron chip and/or the silicon steel iron chip pile back, reduces the no-load consumption of triangle-shaped open core structure.

The utility model discloses the upper end of preferred technical scheme's single frame iron core is the arc chamfer, can reduce the camber of metallic glass iron chip and/or silicon steel iron chip in chamfer department, and then reduces the deformation of the metallic glass iron chip and/or silicon steel iron chip outside in chamfer department, the production of the metallic glass iron chip of being convenient for and/or silicon steel iron chip.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of a single-frame core according to a preferred embodiment of the present invention;

fig. 2 is a schematic sectional view a-a of the single frame core of fig. 1;

fig. 3 is a plan view of a triangular open core structure according to a preferred embodiment of the present invention.

In the figure: 1-single frame iron core; 2-core limb; 3-opening; 4-upper yoke edge; 5-lower yoke edge; 6-iron core edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, a triangular open core structure of a preferred embodiment includes three single-frame cores 1, and two sides of the different single-frame cores 1 are attached to each other to form three core legs 2. The single-frame iron core 1 comprises an amorphous alloy iron chip and a silicon steel iron chip, and the amorphous alloy iron chip and the silicon steel iron chip are mixed and stacked to form the single-frame iron core 1. The amorphous alloy iron chip and the silicon steel iron chip are of single-frame structures, and openings 3 are formed in the amorphous alloy iron chip and the silicon steel iron chip.

In the preferred embodiment, the single-frame iron core 1 comprises the amorphous alloy iron core sheet and the silicon steel iron core sheet, so that the no-load consumption of the single-frame iron core 1 can be effectively reduced. The opening 3 overcomes the technical problem of difficult winding of the closed-loop wound core in the prior art, so that the transformer coil can be wound independently, and various distribution oil-immersed transformers and dry-type transformers with the same capacity as the existing triangular wound core can be manufactured.

It should be noted that the number of the amorphous alloy iron core pieces and the silicon steel iron core pieces stacked into the single-frame iron core 1 is not limited to the number shown in the drawings of the present specification. In the actual production process, an appropriate number of amorphous alloy iron chips and/or silicon steel iron chips can be selected according to the requirements.

Preferably, the three single-frame iron cores 1 have the same shape and size, so that the three single-frame iron cores 1 can be spliced to form a three-phase iron core structure, that is, a triangular open iron core structure is formed, a three-phase magnetic circuit is equal, three-phase current balance is maintained, and harmonic components of no-load current are reduced.

Referring to fig. 2 and 3, as a preferred embodiment, the core limb 2 has a circular cross-section.

In the preferred embodiment, the cross section of the core limb 2 is circular, so that the filling coefficient of the cross section of the core limb 2 can be effectively improved, the utilization rate of materials can be improved, no-load consumption can be reduced, noise can be reduced, and cost can be saved. Specifically, the material utilization rate can reach 98% by making the cross section of the core limb 2 circular.

As a further implementable alternative, the core limb 2 may also be a regular polygon in cross-section. Preferably, the cross section of the core limb 2 is a regular n-polygon, and n is more than or equal to 8. In this embodiment, the larger the value of n, the closer the shape of the cross section of the core limb 2 is to a circular shape, and the higher the filling factor of the core limb 2. Preferably, the cross section of the core limb 2 is regular hexadecagon or regular icosagon.

Referring to fig. 3, as a preferred embodiment, the included angle between the planes of the left and right side surfaces of the single-frame iron core 1 is 120 °.

In the above preferred embodiment, the included angle between the planes on which the left and right sides of the single-frame iron core 1 are located is set to 120 °, so that the iron core columns 2 formed by splicing the three single-frame iron cores 1 can be arranged in a three-dimensional manner according to a triangle, specifically, referring to fig. 3, the centers of the cross sections of the three iron core columns 2 formed by splicing the single-frame iron cores 1 are located at three vertexes of the same equilateral triangle.

Referring to fig. 1, as a preferred embodiment, the single frame iron core 1 has an arc-shaped chamfer at the upper end and a bent chamfer at the lower end. Preferably, the upper end of the single-frame iron core 1 is a quarter circular arc chamfer.

It should be noted that, in the manufacturing process of the bent amorphous alloy iron chip or silicon steel iron chip, annealing treatment needs to be performed on the amorphous alloy iron chip or silicon steel iron chip in advance, and the no-load loss of the amorphous alloy iron chip or silicon steel iron chip can be reduced by about 5% compared with that before annealing. After the amorphous alloy iron chip and the silicon steel iron chip are mixed and stacked, the no-load loss of the amorphous alloy iron chip and the silicon steel iron chip is almost unchanged, namely, the lower end of the single-frame iron core 1 is provided with a bent chamfer, so that the no-load consumption of the iron core structure is reduced. And under the condition of the same iron core structure data, the weight of the bent open iron core structure is reduced by about 2% compared with the cost of a closed rolled iron core material.

Specifically, for a large-capacity transformer, the bent triangular open core structure does not need to be provided with too many tooling devices, such as an iron core winding device, a large-capacity annealing device and a special winding device, so that the manufacturing advantages of the bent triangular open core structure are obvious. Preferably, the low-voltage winding of the transformer with the bent open core structure can be made into foil winding so as to improve the short-circuit resistance of the transformer.

In a preferred embodiment, the angle of the bent chamfer at the lower end of the single-frame iron core 1 is 45 °.

In the above preferred embodiment, the upper end of the single-frame iron core 1 is a quarter arc-shaped chamfer, so that the chamfers at the upper ends of the amorphous alloy iron chips and/or the silicon steel iron chips are the quarter arc-shaped chamfers, thereby facilitating production and manufacturing and improving the tightness of the inner layer and the outer layer.

Referring to fig. 1, as a preferred embodiment, the amorphous alloy core piece and the silicon steel core piece include an upper yoke edge 4, a lower yoke edge 5 and a core edge 6, and the core edges 6 on both sides of the upper yoke edge 4 and the lower yoke edge 5 are connected to form a single frame structure.

In a preferred embodiment, the amorphous alloy iron core sheet and the silicon steel iron core sheet are formed into a single frame structure by bending a ribbon of amorphous alloy and/or silicon steel. Wherein both ends of the ribbon-shaped amorphous alloy and/or silicon steel constitute both sides of the opening 3.

Referring to fig. 1, as a preferred embodiment, the openings 3 are located on the upper yoke edges 4, and the openings 3 on the adjacent two layers of upper yoke edges 4 are arranged in a staggered manner.

Referring to fig. 1, in a preferred embodiment, the openings 3 of the respective layers in the single-frame core 1 are arranged in a stepwise manner along the longitudinal direction of the upper yoke 4.

In the above preferred embodiment, the staggered arrangement of the openings 3 not only can improve the strength of the amorphous alloy iron chip and the silicon steel iron chip after superposition, but also is beneficial to fixing the two ends of the strip-shaped amorphous alloy and/or the strip-shaped silicon steel.

As a preferred embodiment of the present invention, the triangular open core structure further comprises a binding tape wound and fixed on the core limb 2.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A triangular open iron core structure is characterized by comprising three single-frame iron cores (1), wherein side surfaces of the different single-frame iron cores (1) are attached to each other in pairs to form three iron core columns (2);

the single-frame iron core (1) comprises an amorphous alloy iron chip and a silicon steel iron chip, and the amorphous alloy iron chip and the silicon steel iron chip are mixed and stacked to form the single-frame iron core (1);

the amorphous alloy iron chip and the silicon steel iron chip are of single-frame structures, and openings (3) are formed in the amorphous alloy iron chip and the silicon steel iron chip.

2. Triangular open core structure according to claim 1, characterized in that the core limb (2) has a circular or regular polygonal cross-section.

3. The triangular open core structure according to claim 2, characterized in that the angle between the planes of the left and right side faces of the single frame core (1) is 120 °.

4. The triangular open core structure according to claim 1, wherein the single frame core (1) has an arc-shaped chamfer at the upper end and a bent chamfer at the lower end.

5. The triangular open core structure according to claim 4, wherein the upper end of the single frame core (1) is a quarter circular arc chamfer.

6. The triangular open core structure according to claim 4, wherein the angle of the bent chamfer at the lower end of the single frame core (1) is 45 °.

7. The triangular open core structure according to claim 1, wherein the amorphous alloy iron core piece and the silicon steel iron core piece comprise an upper yoke edge (4), a lower yoke edge (5) and an iron core edge (6), and the iron core edges (6) on two sides of the two ends of the upper yoke edge (4) and the lower yoke edge (5) are respectively connected to form a single frame structure.

8. The triangular open core structure according to claim 7, characterized in that the openings (3) are located at the upper yoke sides (4), and the openings (3) on two adjacent layers of the upper yoke sides (4) are arranged in a staggered manner.

9. The triangular open core structure according to claim 8, wherein the openings (3) of each layer in the single frame core (1) are distributed in a step along the length direction of the upper yoke edge (4).

10. A triangular open core structure according to claim 1, further comprising a tie wrap wound around and secured to the core limb (2).