CN203931754U

CN203931754U - Dry-type transformer

Info

Publication number: CN203931754U
Application number: CN201420274499.0U
Authority: CN
Inventors: 张爱民; 杨强
Original assignee: JIANGXI GANDIAN ELECTRIC CO Ltd
Current assignee: JIANGXI GANDIAN ELECTRIC CO Ltd
Priority date: 2014-05-27
Filing date: 2014-05-27
Publication date: 2014-11-05
Anticipated expiration: 2024-05-27

Abstract

The utility model relates to a kind of dry-type transformer, be intended to solve the technical problem that current transformer power consumption is high, noise large, manufacturing cost is higher, comprise that at least two iron cores, correspondence are arranged at the iron yoke of each core ends, are arranged at high-tension coil and low-voltage coil on each corresponding iron core; It is characterized in that: described high-tension coil is that oxygen-free copper-wire coiling forms, described low-voltage coil is that the coiling of strip aluminium strip forms; The utlity model has the advantages such as energy is efficient, safety and environmental protection, low noise, high performance-price ratio.

Description

Dry-type transformer

Technical field

The utility model relates to a kind of dry-type transformer, relate in particular to a kind ofly to adopt banded aluminium strip coiling to form oblate low-voltage coil, and longitudinally iron core adopts the dry-type transformer of multistage lamination overlaying structure.

Background technology

Current, traditional dry-type transformer generally adopts circular iron core structure supporting circular high and low pressure coil, the material that this shape high and low pressure coil adopts is copper cash or Copper Foil, adopts the dry-type transformer volume of this structure large, and its no-load performance and noise level are unreliable; While in addition, adopting the dry-type transformer of above-mentioned traditional structure to manufacture, raw material versatility is low again, the process-cycle long, manufacturing cost is higher, manufacturability is poor, cost performance is very low in actual use.And also there is in actual use the shortcomings such as power consumption is high, noise is large.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, adapts to reality needs, and a kind of dry-type transformer is provided, and is intended to solve the technical problem that current transformer power consumption is high, noise large, manufacturing cost is higher.

In order to realize the purpose of this utility model, the technical scheme that the utility model adopts is:

Design a kind of dry-type transformer, comprise that at least two iron cores, correspondence are arranged at the iron yoke of each core ends, are arranged at high-tension coil and low-voltage coil on each corresponding iron core; Described high-tension coil is that oxygen-free copper-wire coiling forms, and described low-voltage coil is that the coiling of strip aluminium strip forms.

Described iron core is that crystal grain adopts the lamination stack of the some that full annealing technique makes to form.

The cross section ovalize of described each iron core.

The cross section ovalize of described high-tension coil, low-voltage coil.

On described each iron core, be also provided with coat, described coat is epoxy adhesive layer.

The beneficial effects of the utility model are:

1. the high and low pressure coil of dry-type transformer of the present utility model adopts respectively the oblate low-voltage coil of oxygen-free copper-wire and the coiling of shaped like narrow aluminium strip, above design replaces traditional existing Copper Foil coil, because the surface area of every shaped like narrow aluminium strip is larger, its kelvin effect is obvious, can make eddy current loss reduce, no-load loss and no-load current significantly reduce simultaneously, because the versatility of aluminium strip is stronger than traditional Copper Foil material, can make the production cycle of dry-type transformer of the present utility model significantly shorten, production efficiency effectively improves; Using aluminium as low-voltage coil material, and property indices is meeting the requirements of in situation in actual applications, than the dry-type transformer manufacturing cost of traditional Copper Foil material coil, reduces by 30% left and right, with this, has expanded enterprise profit space simultaneously.

2. the design of the longitudinal multistage stepping laminated core structure of the oblateness of dry-type transformer of the present utility model, the product performance index of comparing its loss, noise, anti-short circuit capability with traditional product is more excellent.

3. the iron core of dry-type transformer of the present utility model adopts crystal grain to replace traditional silicon steel sheet design, eliminates the internal stress producing in machining, thoroughly recovers the performance of lattice, further improves the electromagnetic performance of material, and magnetic circuit is all existed without high magnetic resistance everywhere; According to longitudinal multistage stepwise process closed assembly, become oblate cross section structure (be that every a slice is one-level, multistage is a group), improved magnetic flux distribution, reduced no-load current and loss simultaneously.

Accompanying drawing explanation

Fig. 1 is the utility model dry-type transformer schematic diagram;

Fig. 2 is the utility model iron core and iron yoke schematic diagram;

Fig. 3 be in Fig. 2 A-A to core section schematic diagram;

Fig. 4 be in Fig. 2 B-B to iron yoke schematic cross-section.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further illustrated:

Embodiment mono-: a kind of dry-type transformer; Referring to Fig. 1---Fig. 4; Comprise that two iron yokes 6,1, correspondences up and down that three iron cores 3,4,5, correspondence are arranged at three core ends are wound in high-tension coil and the low-voltage coil 2 on each corresponding iron core; The above-mentioned high-tension coil of stating is that oxygen-free copper-wire coiling forms, and above-mentioned low-voltage coil is that the coiling of strip aluminium strip forms.By above-mentioned low-voltage coil, use the design of shaped like narrow aluminium strip instead, because the surface area of every shaped like narrow aluminium strip is larger, its kelvin effect is obvious, can reduce eddy current loss, and the no-load loss of this dry-type transformer and no-load current also significantly reduce simultaneously; Simultaneously because the versatility of aluminium strip is stronger than traditional Copper Foil material, using aluminium as low-voltage coil material, at property indices, all in satisfactory situation, the more traditional Copper Foil material coil of holistic cost of this dry-type transformer reduces by 30% left and right, has also expanded enterprise and has obtained profit margin simultaneously.Each above-mentioned iron core is that crystal grain adopts the lamination stack of the some that full annealing technique makes to form, and the cross section ovalize of each iron core after stack, high-tension coil simultaneously, the equal ovalize of cross section of low-voltage coil, oval-shaped design above, the advantages such as comparing with traditional product of this dry-type transformer has loss, noise, anti-short circuit capability.On each iron core, be also provided with and be coated with one deck epoxy adhesive layer, coat structurally can be realized and suspending every making an uproar, and has reduced core loss, reduces the performances such as noise simultaneously; Each lamination surface coating reduces the vibration between each lamination, and the globality of iron core is strengthened.Above-mentioned iron is gripped 6,1 cross section ovalize, and as shown in Figure 4, this structure is convenient to absorb a large amount of leakage fluxs, reduces noise, reduces the stray loss of transformer, effectively reduces no-load current, no-load loss and noise.

What the present embodiment was announced is preferred embodiment; but be not limited to this; those of ordinary skill in the art; very easily according to above-described embodiment; understand spirit of the present utility model; and make different amplifications and variation, but only otherwise depart from spirit of the present utility model, all in protection range of the present utility model.

Claims

1. a dry-type transformer, comprises that at least two iron cores, correspondence are arranged at the iron yoke of each core ends, are arranged at high-tension coil and low-voltage coil on each corresponding iron core; It is characterized in that: described high-tension coil is that oxygen-free copper-wire coiling forms, described low-voltage coil is that the coiling of strip aluminium strip forms.

2. dry-type transformer as claimed in claim 1, is characterized in that: described iron core is that crystal grain adopts the lamination stack of the some that full annealing technique makes to form.

3. dry-type transformer as claimed in claim 2, is characterized in that: the cross section ovalize of described each iron core.

4. dry-type transformer as claimed in claim 3, is characterized in that: the cross section ovalize of described high-tension coil, low-voltage coil.

5. dry-type transformer as claimed in claim 3, is characterized in that: on described each iron core, be also provided with coat, described coat is epoxy adhesive layer.