CN205789424U

CN205789424U - A kind of electrical transformer cores return yoke structure

Info

Publication number: CN205789424U
Application number: CN201620508825.9U
Authority: CN
Inventors: 王炳光; 许平; 姜蔓花; 苑东升; 廖金木
Original assignee: TBEA Shenyang Transformer Group Co Ltd
Current assignee: TBEA Shenyang Transformer Group Co Ltd
Priority date: 2016-05-30
Filing date: 2016-05-30
Publication date: 2016-12-07
Anticipated expiration: 2026-05-30

Abstract

This utility model relates to a kind of electrical transformer cores return yoke structure, is arranged in three-phase and five-pole or single-phase three-limb core structure, and return yoke cross section is D-shaped, i.e. return yoke lamination side alignment, and opposite side forms camber line, is arranged at stem stem both sides；The return yoke area of section of D-section keeps constant with conventional cross section；Stem stem and return yoke being all cased with to the transformator of coil, the centre-to-centre spacing of two post coils is constant, and the spacing of every grade of iron core reduces.Utility model, on the premise of not changing core section, by using D-shaped return yoke to reduce iron core angle weight, centre-to-centre spacing to reduce the weight of iron core, reduces cost, and reduces transformer noload losses and no-load current further, improve the competitiveness of transformator.

Description

A kind of electrical transformer cores return yoke structure

Technical field

This utility model relates to a kind of power transformer manufacturing technology, specifically a kind of power transformer Device iron core return yoke structure.

Background technology

In current power transformer industry, capacity more than or equal to 180MVA, electric pressure equal to or The commonly used three-phase and five-pole of power transformer (as shown in Figure 1) higher than 220kV or single-phase three posts (as Fig. 2, shown in 3) this core structure with return yoke, and sending out along with power system T & D Technology Exhibition, for reducing transmission line loss, Large Copacity, voltage levels electric power during long distance powedr transmission Transformator will more and more be used.Core structure thus with return yoke surpasses the most far away on consumption Cross this core structure without return yoke of three-phase three-column.And traditional three-phase and five-pole and single-phase three-limb core Return yoke form all use ellipse, symmetrical along centrage, also compare and meet traditional aesthetic conceptions, repeatedly Long-pending also relatively easy, therefore used for a long time.But the iron core of this structure, the spacing of every grade of iron core is relatively Greatly, iron core is great, and open circuit loss is higher, the intensified competition of transformer industry, if from economy side Face considers, this structure is not optimum.

Utility model content

All use ellipse for the return yoke form of electrical transformer cores in prior art, have every grade The spacing of iron core compared with big, iron core is great, the more high deficiency of open circuit loss, to be solved in the utility model Technical problem is to provide a kind of iron core angle weight, centre-to-centre spacing of reducing to reduce the weight of iron core, to enter one Step reduces transformer noload losses and the electrical transformer cores return yoke structure of no-load current.

For solving above-mentioned technical problem, the technical solution adopted in the utility model is:

This utility model one electrical transformer cores return yoke structure, is arranged at three-phase and five-pole or single-phase three In column iron core structure, return yoke cross section is D-shaped, i.e. return yoke lamination side alignment, and opposite side forms camber line, It is arranged at stem stem both sides.

The return yoke area of section of D-section keeps constant with conventional cross section.

Stem stem and return yoke being all cased with to the transformator of coil, the centre-to-centre spacing of two post coils is constant, every grade The spacing of iron core reduces.

Return yoke not being overlapped to the transformator of coil, stem stem is constant with return yoke centre-to-centre spacing.

This utility model has the advantages that and advantage:

1. this utility model is not on the premise of changing core section, by using D-shaped return yoke to reduce Iron core angle weight, centre-to-centre spacing, to reduce the weight of iron core, reduce cost, and reduce transformation further Device open circuit loss and no-load current, improve the competitiveness of transformator.

Accompanying drawing explanation

Fig. 1 is conventional three-phase five column iron core structure top view；

Fig. 2 is traditional single phase three-limb core structure top view；

Fig. 3 is the other column sleeve loop construction top view of traditional single phase three post；

Fig. 4 is this utility model three-phase and five-pole core structure D-shaped return yoke top view；

Fig. 5 is New single-phase three-limb core structure D-shaped return yoke top view；

Fig. 6 is the other column sleeve loop construction D-shaped return yoke top view of New single-phase three post.

Wherein: 1a is the first return yoke, 1b is the second return yoke, and 2 is stem stem, and 3 is coil.

Detailed description of the invention

Below in conjunction with Figure of description, this utility model is further elaborated.

This utility model one electrical transformer cores return yoke structure, is placed in three-phase and five-pole or single-phase three-limb core In structure, return yoke cross section is D-shaped, is arranged at the return yoke lamination side of stem stem both sides, i.e. D-section Alignment, opposite side forms camber line；The return yoke area of section of D-section is constant.

This utility model by changing the form of return yoke, do not change core section long-pending in the case of, reach Transformator cost is reduced to reducing the purpose of iron core weight.

Below by Fig. 1 of traditional structure, 2,3 respectively with this utility model structure chart 4,5,6 one by one Correspondence illustrates.From the comparison of Fig. 1 and Fig. 4, Fig. 2 and Fig. 5 it can be seen that stem stem and return yoke Main in the case of identical, in Fig. 4, Fig. 5 in addition to iron core main the spacing of remaining grade of sheet the most relatively Fig. 1 and Fig. 2 has reduced, thus the length reducing upper and lower yoke correspondence iron core reduces the mesh of iron core weight 's.Fig. 3 with Fig. 6 compare it can be seen that between the return yoke of stem stem and set coil by change return yoke shape Formula, do not reduce hub of a spool according on the premise of reduce every grade of iron core spacing (hub of a spool away from Being all 2300, iron core main spacing is then reduced to 1167.5 by 1327.5, and remaining iron core space at different levels is equal Reduce), decrease the angle weight of iron core simultaneously.And the return yoke not overlapping coil passes through form too Change, in reducing on the premise of not changing coil outer diameter and the coil minimum spacing to return yoke The heart away from (coil outer diameter is all 2478, and coil is all 108.5 to the minimum spacing of return yoke, main away from then by 1680 originally are reduced to 1520), thus greatly reduce the iron core weight of upper and lower yoke, and then reach fall The purpose of low transformator cost and suitably reduction open circuit loss.It is computed, when iron core diameter is more than During 1000mm, using the iron core of D-shaped return yoke heavily will alleviate 2～about 3t on year-on-year basis, no-load transformer damages Corresponding about the 2kW that reduces of consumption, loss of weight and fall loss effect are obvious.

This utility model reduces iron core at transformator and becomes present aspect to optimize substantially, is not changing transformer fe Only reduce weight, cost-effective by the form changing return yoke while core cross section, reduce zero load Loss and the purpose of no-load current.

Claims

1. an electrical transformer cores return yoke structure, it is characterised in that: it is arranged at three-phase and five-pole or list In phase three-limb core structure, return yoke cross section is D-shaped, i.e. return yoke lamination side alignment, and opposite side is formed Camber line, is arranged at stem stem both sides.

2. the electrical transformer cores return yoke structure as described in claim 1, it is characterised in that: D-shaped The return yoke area of section in cross section keeps constant with conventional cross section.

3. the electrical transformer cores return yoke structure as described in claim 1, it is characterised in that: for Stem stem and return yoke are all cased with the transformator of coil, and the centre-to-centre spacing of two post coils is constant, between every grade of iron core Away from reduction.

4. the electrical transformer cores return yoke structure as described in claim 1, it is characterised in that: for Return yoke does not overlap the change of coil.