JPS5988813A - Assembling method of transformer core - Google Patents

Abstract

PURPOSE:To obtain the characteristic eqivalent to that of lap type and the working efficiency equivalent to that of butt type by forming two core groups as in the case of the butt type and forming lap type contact surfaces of both core groups after loading the core groups to coils. CONSTITUTION:A first core group 6 is formed by laminating the first iron core 1, while a second core group 7 by laminating the second core 2 like the core 1. The core groups 6, 7 thus formed are inserted into the coil and thereafter these are pressed by the jigs 8 and 9 so that the core 6 is pressed toward the core group 7, while the core group 7 toward the core group 6. A plurality of flat protrusions 10 in the thickness (t) thinner than that of core 1 are formed with the same pitch as thickness of the core 1 on the contact surfaces with the cores 6, 7 of the jigs 8, 9. As described above, when the jigs 8, 9 are pressed, the butt type contact surface of the cores 6, 7 changes to the lap type contact surface. The characteristic equivalent to that of lap type transformer can be obtained by such assembling method and the transformer can be manufactured by the same efficiency as that of the butt type transformer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for assembling an iron core for a transformer.

Generally, a transformer is constructed by attaching a pair of iron cores consisting of a first iron core and a second iron core to a pre-prepared winding, and welding or other means to bring the first iron core and second iron core into close contact. The first iron core and the second iron core are E and ■, E and E, and F.
and F, U and ■, U and U, J and J, etc., forming a pair, and the laminated state of the first iron core and the second iron core is used to distinguish between the lap type and the butt type. be able to.

The wrap type is a method in which the first iron core 1 and the second iron core 2 are alternately laminated as shown in Fig. 1.
This prevents the contact surface from being in a straight line. In addition, the butt type means that the first iron core group 3 is formed by laminating the first iron cores 1, and the second iron core group 4 is formed by laminating the second iron cores 2, as shown in FIG. The first iron core group 3 and the second iron core group 4 are pressed from both sides with a flat jig 5 to bring them into contact, and the contact surfaces are made in a straight line.

The wrap type described above has good transformer characteristics, but there are problems in that it takes time to insert the first iron core 1 and the second iron core 2 one by one from the left and right alternately, and the Make sure that the contact surfaces between the first iron core 1 and the second iron core 2 do not separate (
There is a difference in that it requires metal fittings (bands, angles, etc.) to hold it down. On the other hand, - in the butt type described above, the first iron core group 3 and the second iron core group 4, which have been laminated and prepared in advance, can be inserted into the winding at the same time, so the manufacturing efficiency of the transformer is very high. However, since the contact surface between the first core group 3 and the second core group 4 is in a straight line, the characteristics of the transformer, especially the intercondylar, where about 20% more no-load current flows than the wrap type. There is.

This invention was made in view of the following circumstances, and its purpose is to create a trans-river iron core that provides almost the same characteristics as the wrap type, and has almost the same work efficiency as the butt type. The purpose is to provide an assembly method.

Hereinafter, the present invention will be described with reference to the accompanying drawings (example 1 shown in the drawings).

As shown in FIG. 3, the first iron core group 6 is made of first iron so that it has the stacking thickness necessary for the winding (not shown), similar to the first iron core group 3 shown in FIG. The cores 1 are laminated L, and the second iron core group 7 is similarly formed by laminating one second iron core 2 having the same thickness as the first iron core 1. Thus formed the first. 2nd iron core group 6.7
After being inserted into the winding from the left and right, as shown in FIG. 6 is pressed by the first jig 8 and the second jig 91. Each jig 8.9 has the first. 2nd iron core group 6
．． On the contact surface of 7, flat plate-shaped protrusions 1 having the same pitch as the thickness of the first iron core 1 and having a thickness smaller than the thickness of the first iron core are formed.
A plurality of 0's are formed. Note that it is sufficient that the protrusion length I of the protrusion 10 is 60% or more of the thickness of the iron core used, that is, the first iron core 1.

] As in 2, 1st. When the second jig 8.9 is pressed,
Since the contact surfaces of the first iron core group 6 and the second iron core group 7 change from a straight line to a staggered shape, that is, from a bat shape to a wrap shape, the contact surfaces may be fixed by bath welding or the like. In addition, conventionally, due to the size of the iron core, the size of the 5-winding bobbin, etc.
There was some looseness between the iron core and the winding or bobbin, but
1st. The winding or bobbin is tightened from both the left and right sides by the second iron core group 6.7, so that it is possible to manufacture a product without backlash.

Table 1 shows a comparison of the transformer characteristics obtained using the assembly method of the present invention as described below and the transformer characteristics based on FIGS. 1 and 2.

As shown in Table 1, if a transformer is manufactured using the method of this invention, it will exhibit the same transformer characteristics as a conventional wrap type transformer, and its manufacturing work will be second to none when compared to a butt type transformer. Since the flat jig 5 shown in the figure is simply replaced with the first and second jigs 8.9 on which the protrusions 10 are formed, there is no difference in the working process and there is no reduction in manufacturing efficiency.

In addition, in the following embodiments, the first. The first iron core 1 of the first iron core group 6 and the second iron core 2 of the second iron core group 7 were pressed every other piece using the second jig 8°9, but the pressure was applied every two or several pieces. However, it is desirable to press every other sheet.

As shown in the figure, this invention is similar to the conventional bat type. After forming the second iron core group and attaching the winding or winding hobbin to each iron core group, the first iron core group is formed. The contact surface of the second core group changes from a butt-like shape to a wrap-like shape (as a result, the same characteristics as a conventional wrap-type transformer can be obtained, and since no new process is added in the manufacturing process, the butt-type It has the advantage that it can be manufactured with the same manufacturing efficiency as .

[Brief explanation of drawings]

Figure 1 is a perspective view showing the state of the iron core when a conventional wrap-type single-stranded iron core is assembled, and Figure 2 is a perspective view showing the state of the iron core when a conventional wrap-type single-stranded iron core is assembled. Figure, 3rd
Figure 4 is a perspective view explaining this assembly method, and Figure 5 is a perspective view explaining this assembly method.
This figure is a perspective view showing an example of the present invention assembled and completed according to FIGS. 3 and 4. 1... First iron core, 2... Second iron core, 3.6... First iron core group, 4.7... Second II/IX core group, 5.8.
9...Jig. 10...Protrusion

Claims (1)

[Claims] [Method of attaching the iron core of a transformer having a pair of first iron core and second iron core to the winding] Here, the first iron core group is formed by stacking first iron cores of the same shape. One second iron core group is formed by stacking second iron cores of the same shape, and the first. Attach the second iron core group to the winding and connect each iron core of the first iron core group and the second iron core group to one
An assembly of an iron core for a transformer, characterized in that the contact surface between the first iron core group and the second iron core group is changed from a bat shape to a wrap shape and fixed by pressing the other iron core every few cores. Method.