CN204577219U - Tabs Combined coiled is unshakable in one's determination - Google Patents

Abstract

The utility model discloses a folded sheet combined type coiled iron core, which is composed of a female iron core and a paired male iron core. The female iron core and the male iron core are respectively formed by stacking a group of groove-shaped silicon steel sheets with the same shape and different sizes. The right-angle sides of the stacked groove-shaped silicon steel sheets in the female iron core are lengthened sequentially from the inner layer to the outer layer, and the arrangement sequence of the stacked groove-shaped silicon steel sheets in the male iron core is opposite to that of the female iron core. When the female iron core is matched with the male iron core, each layer of trough-shaped silicon steel sheets complements each other to form a rectangular frame-shaped coiled iron core with four corners truncated. The coiled iron core made by the utility model is a combined structure, and the coil and the coiled iron core can be manufactured separately, which is conducive to improving production efficiency, and the magnetic circuit and the silicon steel strip maintain the same high magnetic permeability direction, and have good electromagnetic properties. It is especially suitable for making energy-saving power transformers.

Description

Folded combined wound core

technical field

The utility model relates to a transformer iron core. Specifically, the utility model relates to a combined iron core which is stacked sequentially, in particular to a folded piece combined wound iron core.

Background technique

The core is the main component of the transformer, and the electromagnetic performance of the transformer depends to a large extent on the structure of the core. The iron core for conventional transformers is made of laminated silicon steel sheets. Most of the transformers used in the market are alternate flat lamination structures. Although the iron cores of this structure are less difficult to produce, they are easy to install with coils. However, the iron core with alternate flat lamination structure also exposed some problems in actual use. First, each layer of the iron core is composed of multiple silicon steel sheets alternately stacked flat. There are at least six butt joints in this structure. There is actually a kind of air gap in the circuit, and too much air gap directly increases the reluctance of the magnetic circuit. Secondly, the magnetic circuit and the high magnetic permeability direction of the material are inconsistent due to the different lamination positions of the horizontally stacked silicon steel sheets. Another problem is that the flat stacked silicon steel sheets are not tight enough, and the iron core with a low lamination coefficient will generate greater noise during operation. The closed core structure is the most representative structure in this industry today, and it is formed by winding silicon steel strips of equal width. The closed core structure avoids the shortcomings of the alternate flat lamination structure. There is no air gap in the structure, and the magnetic circuit and the wound silicon steel have a consistent high magnetic permeability direction. However, the manufacturing difficulty of the closed core is much greater than that of the alternate flat stack structure, especially the coil is directly wound on the core. In addition to directly increasing the supporting requirements of production equipment, the production efficiency is also low, so the application is limited to a certain extent.

Utility model content

The utility model mainly aims at the deficiencies of the prior art, and proposes a combined folded iron core with simple structure, easy folding, convenient assembly and excellent electromagnetic performance. This structure makes the magnetic flux on the magnetic circuit follow the rolling direction of the silicon steel strip. circulation.

The utility model realizes the technical goal through the following technical solutions.

Folded combined wound iron core, which is composed of a female iron core and a paired male iron core. The female iron core and the male iron core are respectively formed by stacking a group of groove-shaped silicon steel sheets with the same shape and different sizes, and the thickness and width of each groove-shaped silicon steel sheet are equal. The improvement is that: the two right angles of the groove-shaped silicon steel sheet are folded into truncated right angles, the lengths of the right-angle sides on both sides of each sheet are equal, and the lengths of the right-angle sides on both sides of the adjacent superimposed groove-shaped silicon steel sheets change in equal order, The groove width of the adjacent superimposed groove-shaped silicon steel sheets differs by two layers of sheet thickness. The lengths of the right-angled sides of the stacked groove-shaped silicon steel sheets in the female iron core are lengthened sequentially from the inner layer to the outer layer, and the inner cavity of the female iron core after being stacked forms an inner ladder structure; the two sides of the overlapped groove-shaped silicon steel sheets in the male iron core The length of the right-angled sides decreases in order from the inner layer to the outer layer, and the descending arrangement forms an outer ladder structure. The female iron core and the male iron core cooperate to form a complementary four-corner truncated rectangular frame-type wound iron core.

In the above structure, the truncation angle of both sides of the groove-shaped silicon steel sheet is α=40 ⁰ to 50 ⁰ , and the truncated hypotenuse of the innermost layer is E=3 to 5 mm.

Compared with the prior art, the utility model has the following positive effects:

1. The rolled iron core is made of bent and formed trough-shaped silicon steel sheets stacked one after another, so no mold is needed for assembly, and the production efficiency is high and the production cost is low;

2. The wound core is a laminated structure, and there is no residual internal stress in the structure, which saves the annealing process;

3. The winding core is a combined structure, so the coil and the winding core are manufactured separately, which is beneficial to production;

4. When the female iron core and the male iron core are combined to form a complementary structure, each layer has only 2 butt joints, and the reluctance in the magnetic circuit is similar to that of the closed coil core, which is conducive to improving the operating efficiency of the transformer and reducing noise.

Description of drawings

Figure 1 is a structural schematic diagram of a parent core formed by stacking a family of grooved silicon steel sheets.

Figure 2 is a schematic diagram of the structure of a common iron core formed by stacking a family of groove-shaped silicon steel sheets.

Fig. 3 is a schematic structural diagram of the combination of the female iron core and the male iron core.

FIG. 4 is a side view of FIG. 3 .

Fig. 5 is an enlarged three-dimensional schematic diagram of a single groove-shaped silicon steel sheet structure.

Detailed ways

Below according to accompanying drawing and in conjunction with embodiment, the utility model is further described.

The folded sheet combined wound core shown in Fig. 3 is composed of a female core 1 and a paired male core 2. The female iron core 1 and the male iron core 2 are respectively formed by stacking a group of groove-shaped silicon steel sheets with the same shape and different sizes. As shown in FIG. 5 , the thickness C and width A of each groove-shaped silicon steel sheet are equal. The two corners of the trough-shaped silicon steel sheet are folded into truncated right angles. In this embodiment, the opposite right-angled side is truncated by α ⁼ 450, the inner layer is truncated and the hypotenuse is E=3mm, and the subsequent superimposed layers are incremented according to the thickness C of each layer. The length H of the right-angled sides on both sides of each sheet changes in equal order, and the groove width B of adjacent superimposed groove-shaped silicon steel sheets differs by two layers of sheet thickness C. The right-angle sides on both sides of the stacked groove-shaped silicon steel sheets in the female core 1 and the male core 2 are all different in length, and the staggered lengths of each layer are equal. The mother iron core 1 shown in Fig. 1 is lengthened sequentially from the inner layer to the outer layer, and the inner cavity of the mother iron core 1 forms an inner stepped structure after being stacked. The male iron core 2 shown in Figure 2 is also a superimposed structure, and the arrangement order of the built-in grooved silicon steel sheets is opposite to that of the female iron core 1, that is, the length of the right-angled sides of the stacked grooved silicon steel sheets in the male iron core 2 starts from the inner layer The outer layers are shortened in order, and arranged in descending order to form an outer ladder structure. When assembled and installed, the male core 2 is inserted into the female core 1, and the outer ladder structures on both sides of the male core 2 cooperate with the inner ladder structures on both sides of the inner cavity of the female core 1, that is, the groove-shaped silicon steel core 2 and the female core 1 are on the same layer The pieces complement each other to form a rectangular frame whose four corners are truncated according to α ⁼ 450, and each layer is complemented in this way to form a coil core as shown in Figure 3 and Figure 4. The wound core of this structure has only 2 butt joints per layer, at least 4 butt joints are subtracted from the conventional alternate flat lamination structure, and only 1 more butt joints than the closed core, plus the magnetic circuit It maintains the same high magnetic permeability direction as the silicon steel strip, so the utility model has similar electromagnetic properties to the closed iron core. On the other hand, the coiled iron core of the utility model is a combined structure, which can realize separate manufacturing of the coil and the wound iron core, which is beneficial to improving production efficiency and product quality.

Claims (2)

1. A folded combined wound iron core, which is composed of a female iron core (1) and a paired male iron core (2); The same groove-shaped silicon steel sheets are stacked and formed, and the thickness (C) and width (A) of each groove-shaped silicon steel sheet are equal; it is characterized in that: the two right angles of the groove-shaped silicon steel The lengths (H) of the right-angled sides on both sides of the sheet are equal, while the lengths (H) of the right-angled sides (H) on both sides of adjacent superimposed groove-shaped silicon steel sheets change in equal order, and the groove width (B) of adjacent superimposed groove-shaped silicon steel sheets differs by two Layer thickness (C); the length of right-angle sides (H) on both sides of the stacked trough-shaped silicon steel sheets in the female core (1) is lengthened in order from the inner layer to the outer layer, forming an inner ladder structure; the male core (2) The lengths (H) of the right-angled sides of the stacked groove-shaped silicon steel sheets are shortened in order from the inner layer to the outer layer, and are arranged in descending order to form an outer ladder structure; the female core (1) and the male core (2) cooperate to form a complementary four-corner Truncated rectangular frame wound core. 2. The combined folded iron core according to claim 1, characterized in that: the truncation angle of both sides of the groove-shaped silicon steel sheet is α=40 ⁰ ～50 ⁰ , and the truncated hypotenuse of the innermost layer is E=3～ 5mm.