CN2508364Y

CN2508364Y - Coiled iron core

Info

Publication number: CN2508364Y
Application number: CN 01255013
Authority: CN
Inventors: 张明德
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-30
Filing date: 2001-11-30
Publication date: 2002-08-28
Anticipated expiration: 2011-11-30

Abstract

The utility model discloses a winding type iron core. The utility model consists of an iron yoke and a plurality of core columns, the core columns are arranged in the shape of a stereo, and are formed by splicing a plurality of single frame iron cores with combined-shaped cross sections, the transverse sections with the same shape or the similar shape of the single frame iron cores are close to semicircles, and each combined-shaped cross section is surrounded with a section of outer contour line composed of a plurality of broken lines close to semicircular arcs and a section of inner contour line of a diameter line, and the tail end of one broken line on the outer side of the outer contour line is hermetically connected on the diameter line of the inner contour, the transverse section of each core column after being spliced is close to a circle, and a V-shaped small notch is formed on the outer side. Because a plurality of core columns of the iron cores of the utility model are arranged in the shape of the stereo, the length of the magnetic path of each core column is consistent, the shortest length is evenly achieved, and thereby the loss of each core column evenly achieves to be smallest. In addition, the iron core weight can be reduced by 10 percent, the no load loss can be reduced by above 10 percent, the winding material utilization rate is 100 percent, and the cross section occupation coefficient can be achieved to 0.98 to 0.99, thus not only the copper material is saved, but also the load loss of a transformer is reduced.

Description

A kind of takeup type iron core

(1) technical field

The utility model relates to a kind of takeup type iron core.

(2) background technology

At present electrical equipment such as transformer adopts silicon steel sheet or silicon strip manufacturing, manufacture method to mainly contain stacked with the iron core overwhelming majority and two kinds of takeup types.Laminated core structure is owing to exist air-gap in the magnetic circuit, defective tightness between the silicon steel sheet, but also exist the high magnetic conduction direction of local area material and the magnetic circuit direction inconsistent, make the poor-performing of iron core.Though the takeup type iron core overcomes the above-mentioned shortcoming of laminated core structure, make the transformer noload losses of manufacturing low, noise is low, performance is significantly improved, but, stem stem cross section for the takeup type iron core is stairstepping or circle, there is following shortcoming: stepped cross-section volume iron core, be to reel successively with the straight band of several different in width to form, band material quantity is many, the difficulty of reeling, the cross section occupation efficiency is lower, only about 0.9, thereby the coil average turn is longer, not only wastes copper material, also increase the load loss of transformer, reduced the performance of transformer; Round section roll-core (being R sections core), be to reel with the silicon strip of the wide narrow again curve shape in the earlier narrow back of width to form, the silicon strip stock utilization is lower, and it only is 86～90% that the double joint cover is cut apart with a knife or scissors the material utilance, waste the silicon strip of more costliness, increased manufacturing cost.

Therefore the applicant had once done improvement to the shape of cross section of the stem stem of takeup type iron core on this basis, and having obtained the utility model name, to be called " the volume iron core with complex cross section ", the patent No. be 00216872.3 patent right.Be somebody's turn to do the structure of " volume iron core " with complex cross section, as shown in Figure 1, stem stem 11,11 ' cross section be divided into three zones from inside to outside, the shape of cross section in

inner region

6,7 and 8,9 two zones of outskirt is made up of trapezoidal, the cross section of zone line 13 is a truncated cone-shaped, and the summit in each cross section coexists on the circumference.Such scheme, iron core stem stem shape of cross section is very near circular, the cross section occupation efficiency is up to 0.98～0.99, thereby the average turn that has reduced coil is long, compare with the stepped cross-section volume iron core of same cross-sectional area, external girth reduces 4～7%, and this not only can save copper material, and has reduced the load loss of transformer.In addition, because the stock utilization that trapezoidal silicon strip is cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing is 100%, the curve silicon strip is because arc section is positioned at the middle part, cross section, change width is little, when therefore material is cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing, make the utilance of material improve greatly, than the utilance raising 9～13% of circular cross-section volume core material.

But, although above-mentioned patent has obtained suitable progress, but the arrangement mode of iron core stem stem is owing to the planar alignment that adopts, and the length of magnetic path that has formed each stem stem is inconsistent, not only saved material for the stem stem that magnetic circuit is short, and the performance of stem stem is good, and for the long stem stem waste material of magnetic circuit, and poor performance, therefore the performance of each stem stem is inconsistent, influences the performance of transformer.The curve silicon strip adds man-hour, and stock utilization does not reach 100%, still has the waste of minor amount of silicon steel band.

(3) utility model content

The purpose of this utility model is to provide a kind of above-mentioned defective that overcomes, more excellent performance, the takeup type iron core that cost is lower.

A kind of takeup type iron core provided by the utility model, it is combined by iron yoke and some stem stems, be characterized in, described stem stem is three-dimensional and arranges, and the single frame iron core that cross section identical by several shapes or that shape is similar approaches the combination tee section of semicircle is put together, the outer contour that this combination tee section is made up of one section some broken line that approach to semi arch and one section diameter line inner outline surrounded, and the tail end of the outside one broken line of its outer contour envelope is connected on the diameter line of interior profile, and each stem stem cross section is approaching circular after making amalgamation, and form one " V " font small gap in the outside.

Above-mentioned takeup type iron core, wherein, single frame all is to be reeled successively by the trapezoidal silicon strip of plurality of differently-sized to form, or directly is with to reel successively by the trapezoidal silicon strip of plurality of differently-sized and a wide silicon steel and forms.

Above-mentioned takeup type iron core, wherein, the window shape of single frame iron core can be square, also can be runway shape.

Above-mentioned takeup type iron core, wherein, the quantity of stem stem is more than 3 or 3, and when the quantity of stem stem was 3, stem stem can be three-dimensional equidistant triangle battle array to be arranged, and when the quantity of stem stem was 4, stem stem can be three-dimensional square formation and arrange.

Owing to adopted above-mentioned technical solution, that is: several stem stems of iron core are three-dimensional arrangement, make the length of magnetic path unanimity of each stem stem like this, and all reach the shortest, thereby make the loss of each stem stem all reach minimum.The iron core that is planar alignment with stem stem is compared, and the utility model iron core weight can reduce 10%, and performance improves a lot, and no-load loss reduces more than 10%.Secondly, very near circular, the cross section occupation efficiency can reach 098～0.99 to iron core stem stem shape of cross section, thereby it is long to have reduced the coil average turn.Compare with the stepped cross-section volume iron core of same cross-sectional area, the circumscribed circle girth reduces 4～7%.So not only save copper material, and reduced the load loss of transformer, improved the performance of transformer.Silicon strip stock utilization height of the present utility model does not have waste material and cuts out a piece of cloth in a way with the minimum material to make two or more articles of clothing processing because trapezoidal silicon strip can carry out double joint, and stock utilization reaches 100%.Simultaneously, the silicon strip quantity of use reduces 1/2 than stairstepping volume iron core silicon strip quantity, thereby processing technology is simple, reels closely, and processing cost is low.But also the whole overlapping phenomenons of burr that produce when having avoided stairstepping volume coiling iron core, thereby this kind volume iron core performance significantly reduces by the burr effect, makes performance more stable, more consistent.

(4) description of drawings

Fig. 1 is existing cutaway view with the volume iron core in complex cross section;

Fig. 2 is the iron core overall structure schematic diagram of the utility model embodiment;

Fig. 3 is the vertical view among Fig. 2;

Fig. 4 is the single frame structure chart of the utility model iron core;

Fig. 5 is the A-A cutaway view among Fig. 4;

Fig. 6 is each bar silicon strip shape figure;

Fig. 7 is that trapezoidal silicon strip is cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing method continuously.

(5) embodiment

With the three-dimensional volume of three-phase three-column combination tee section iron core is that example is illustrated particular content of the present utility model:

Shown in Fig. 2-5, the utility model, promptly the takeup type iron core 2, stem stem is three-dimensional to be arranged, and the single frame iron core 21 that approaches semicircle by 3 identical cross sections of shape is put together, and after making amalgamation the stem stem cross section near circular.

The outer contour 211 that the stem stem cross section of single frame is made up of one section some broken line that approach to semi arch and one section diameter line 212 inner outline surrounded, the oblique angle of inner outline is α, α=60 ° for the three-dimensional volume of three-phase three-column combination tee section iron core.And the tail end of the outside one broken line 2111 of its outer contour 211 envelope is connected on the diameter line of interior profile 212, each broken line summit of remaining outline is on same semi-circumference, and each stem stem cross section is approaching circular after making amalgamation, and form one " V " font small gap 22 in the outside.

As shown in Figure 6, directly be with 33 coilings to form by trapezoidal silicon strip 31,32,34,35,36,37 and wide silicon steel; So this iron core is formed by the overlapping coiling of a graded by the silicon strip of seven different sizes.See Fig. 7, the double joint of trapezoidal silicon strip is cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing method continuously.Above-mentioned cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing processing and all can carry out on the existing micro-processor controlled broken line cutting machine at present.

Because but the trapezoidal silicon strip double joint of broken line part is cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing method processing, promptly do not have waste material yet and cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing processing, stock utilization reaches 100%, and it is 100% that wide silicon steel directly is with the stock utilization of opening material, so this kind iron core silicon strip material comprehensive utilization ratio reaches 100%.

Claims

1, a kind of takeup type iron core, it is combined by iron yoke and some stem stems, it is characterized in that, described stem stem is three-dimensional and arranges, and the single frame iron core that cross section identical by several shapes or that shape is similar approaches the combination tee section of semicircle is put together, the outer contour that this combination tee section is made up of one section some broken line that approach to semi arch and one section diameter line inner outline surrounded, and the tail end of the outside one broken line of its outer contour envelope is connected on the diameter line of interior profile, and each stem stem cross section is approaching circular after making amalgamation, and form one " V " font small gap in the outside.

2, a kind of takeup type iron core according to claim 1, it is characterized in that, described single frame all is to be reeled successively by the trapezoidal silicon strip of plurality of differently-sized to form, or directly is with to reel successively by the trapezoidal silicon strip of plurality of differently-sized and a wide silicon steel and forms.

3, a kind of takeup type iron core according to claim 1 is characterized in that, the window shape of described single frame iron core can be square, also can be runway shape.

4, a kind of takeup type iron core according to claim 1 is characterized in that, the quantity of described stem stem is more than 3 or 3, when the quantity of stem stem is 3, stem stem can be three-dimensional equidistant triangle battle array to be arranged, and when the quantity of stem stem was 4, stem stem can be three-dimensional square formation and arrange.