JPS5831378Y2 - transformer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transformer having a magnetic core that constitutes a closed magnetic path by abutting two magnetic core components.

Conventional transformers of this type have been constructed as shown in FIGS. 1 to 6.

That is, two magnetic core structures 1 and 2 made of U-shaped ferrite sintered bodies are butted together to form a square-shaped magnetic core 3, and a U-shape is formed on the outer peripheral surface of the magnetic core structures 1 and 2. A fastening fitting 5 made of an elastic round bar as shown in FIG. 6 is installed in the shaped groove 4.
The abutting surfaces of the magnetic core structure 1.2 are firmly pressed into contact with each other, and the coil 6 is attached to one magnetic leg of the magnetic core 3.

The AA' cross section of the magnetic core 3 is shown in FIG.
Since the magnetic path cannot be used 100% and magnetic flux concentration occurs within the magnetic core, loss of the magnetic core occurs, and the tightening fitting 5
Since the fastening fitting 5 is fitted into the U-shaped groove 4, which has a complicated shape, there are drawbacks such as poor assembly workability and a disadvantage in terms of cost.

The present invention eliminates the above-mentioned drawbacks of the prior art.

An embodiment of the present invention will be described below with reference to FIGS. 7 to 13.

Reference numeral 7.8 is a magnetic core structure formed by sintering ferrite powder and formed into a substantially U-shape by magnetic legs 9 and 10 on both sides and a common magnetic leg 11; 9
, 10 are butted against each other to form an opening-shaped magnetic core 12.

An elliptical recess 13 is formed at the center of the upper surface of the common magnetic leg 11 of the magnetic core components 7 and 8, and recesses 14 are also formed at the corners of both ends of the common magnetic leg 11.

In a state where such magnetic core structures 7 and 8 are butted together,
A U-shaped fastening fitting 15 is coupled with an elastic metal rod as shown in FIG. 12 or 13.

That is, both ends of the fastening fitting 15 fit into the recess 13 at the center of the common magnetic leg 11 of each magnetic core structure 7, 8, press the center of both magnetic core structures 7, 8, and abut the common leg 11. It also fits into the recess 14 at the corner and is prevented from being removed.

A coil 16 is attached to one side magnetic leg 10 of such a magnetic core 12.
is installed.

Further, the BB' cross section of the magnetic core 12 in FIG. 8 becomes a perfect circle as shown in FIG. 11.

The clamping fitting 15 shown in FIG.
,8. ．． : recessed part 13. The one shown in FIG. 13 has one end extending downward, and this downwardly extending portion 17 is used for fitting into and fixing to a terminal board or the like.

In addition, in the above embodiment, a U-shaped magnetic core structure constructed by sintering ferrite powder was explained.
It may be a combination of magnetic core structures of shape 1:1. It may be a laminated magnetic core structure in which laminated iron plates are laminated and the four layers are bonded together by welding or adhesion.

, :, ・As described above, the transformer of the present invention has a concave portion that fits both ends of the hollow-shaped fastening fitting, and is provided in the upper and lower surfaces of the magnetic core structure constituting the magnetic core. ,
Because the tightening fittings were fitted into the corners of the magnetic core and the recesses were punched, there were no recesses in most of the magnetic cores, and the magnetic path was 1.
%, which improves efficiency and allows for smaller size and lighter weight.

In addition, magnetic flux concentration in the magnetic path does not occur, magnetic core loss is reduced, and fastening fittings are easy to assemble, making manufacturing easy and inexpensive. □It also improves work efficiency, and as a result, cost savings □
It has the advantage of being able to reduce energy consumption and measure it, and is of great practical value.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional transformer; 2 is a sectional view taken along line A-A' in Figure 2, Figure 6 is a front view of the fasteners and fittings used in the transformer, Figure 7 is a front view showing an embodiment of the transformer of the present invention, and Figure 8 is a front view showing an embodiment of the transformer of the present invention. 9 is a front view of the magnetic core of the transformer, 9 is a side view, 10 is a top view of the same, 11: is a BB' sectional view of 8, and 12 is a sectional view of the magnetic core of the transformer.
Fig. 1, Fig. 13 (front view of the fastening fitting used for horizontal modification) 7.8...Magnetic core structure, 12...Magnetic core, 13... ... Recessed portion, 14 ... Recessed portion, 15
......Tightening metal fittings, 16...:...Coil.

Claims (1)

[Scope of utility model registration request] A magnetic core of a closed magnetic circuit is constructed using two U-shaped magnetic core structures or a U-shaped magnetic core structure and a ■-shaped magnetic core structure, and the outer central part of each of the magnetic core structures and the A recess is formed only in the center of the four corners of the magnetic core, and a recess formed in the center of each of the magnetic core components and a recess formed in the center of the corner
A transformer in which the magnetic core is fixed using U-shaped clamping fittings that fit into two of the recesses, and a coil is attached to the magnetic legs of the magnetic core.