CN2549572Y

CN2549572Y - Coiled iron core

Info

Publication number: CN2549572Y
Application number: CN 01254231
Authority: CN
Inventors: 张明德
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-17
Filing date: 2001-10-17
Publication date: 2003-05-07
Anticipated expiration: 2011-10-17

Abstract

The utility model relates to a coiled iron core which is formed by combing an iron yoke and a plurality of core posts. The utility model is characterized in that the core posts are arrayed in stereo and formed by piecing together a plurality of same form or similar form single frame iron cores. The sections of the iron cores are close to half-round compound sections; The compound section is divided into three areas from inner to outer, and the external contour lines of the inner area and the outer area take a folding line closing to an arc shape, while the external contour line of the middle area takes a round arc shape; and the section of each core post after being pieced together is close to a round shape. The plurality of core posts of the iron core is arrayed in stereo and the magnetic line length of each core post is consistent with all reaching shortest, thereby reaching the smallest loss of each core post. The weight of the iron core can be decreased by 10 percents and the excitation loss can be decreased by more than 10 percents. Besides, the section shape of the iron core is close to a round, so that the utilization rate of the coiled material can reach more than 98.5 percents, and the section duty factor can reach 0.98 to 0.99, thereby not only saving the copper material, but also decreasing the load loss of the transformer.

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.

(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 complex cross section of semicircle is put together, and this complex cross section is divided into three zones from inside to outside, the broken line of the outer contour in inside and outside two zones for approaching to circular arc, the outer contour of zone line is a circular arc, and each stem stem cross section is approaching circular after making amalgamation.

Above-mentioned takeup type iron core, wherein, single frame all is to be reeled successively by many silicon strips of two kinds of different shapes to form.

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 coiling material utilance can reach more than 98.5% iron core stem stem shape of cross section, and the cross section occupation efficiency can reach 0.98～0.99, 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.In addition, the silicon strip quantity of the utility model use reduces than stairstepping volume iron core silicon strip quantity

, thereby processing technology is simple, reels closely, 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;

Fig. 8 is that the curve 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 three-phase three-column complex cross section stereo volume 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 of the stem stem cross section of single frame is broken line-circular arc-broken line, and inner outline is an oblique line that the oblique angle is α, α=60 ° for three-phase three-column complex cross section stereo volume iron core.This cross section by interior, in, outer three zones 213,212,211 form.Inner region 213 forms a trapezoid cross section, and zone line 212 forms a cross section that is similar to round platform, and outside 211 are made up of three kinds of trapezoid cross sections.Its outer contour summit is on same semi-circumference.As shown in Figure 6, the trapezoid cross section part is reeled by

trapezoidal silicon strip

31,32,33,34 and is formed; Class truncated cone-shaped cross section part is reeled by a wide curve silicon strip 35 in two narrow centres and is formed.So this iron core is formed by the overlapping coiling of a graded by trapezoidal silicon strip and a curve silicon strip of four 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.See Fig. 8, the method that the double joint of curve silicon strip is cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing continuously.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 meander line cutting machine at present for above-mentioned two kinds.

Because but the equal double joint of the curve silicon strip of the trapezoidal silicon strip of broken line part and circular arc portion is cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing method processing; Trapezoidal silicon strip can 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, and stock utilization reaches 100%; The curve silicon strip is because arc section is positioned at the middle part, cross section, the central region change width is little, and can carry out double joint and cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing, thereby the curve silicon strip adds the stock utilization in man-hour and can reach more than 97%, so this kind iron core silicon strip material comprehensive utilization ratio reaches more than 98.5%.

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 complex cross section of semicircle is put together, and this complex cross section is divided into three zones from inside to outside, the broken line of the outer contour in inside and outside two zones for approaching to circular arc, the outer contour of zone line is a circular arc, and each stem stem cross section is approaching circular after making amalgamation.

2, a kind of takeup type iron core according to claim 1 is characterized in that, described single frame all is to be reeled successively by many silicon strips of two kinds of different shapes to form.

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.