JPS6041210A - Transformer - Google Patents

Abstract

PURPOSE:To accurately obtain the close contact at the entire surface of contact surface without bending area at both ends of cut-core by forming a shell type transformer with the C type unit cut-core where a rectangular rolled core is cut in the longitudinal direction. CONSTITUTION:A hollow type rectangular rolled core is formed by winding a silicon steel plate in the specified width around a rectangular bobbin, and this rolled core is cut in the longitudinal direction, thereby forming unit cut-cores 18a-18d. These unit cut-cores 18a and 18b are placed in contact back to back in almost the shape of X and the internal core 13 is pressurizingly held by a tightening metal 16, with the unit cut-cores 18c and 18d used as the right and left external cores 14, 15. A winding 11 is wound around the internal iron core 13, thereby forming a flat and thin transformer 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transformer, particularly an outside iron type transformer. In general, an outside iron type transformer is as shown in FIG. 1.
Type II type pressure vessel 1, which is a combination of type 1 iron core 2 and type 1 iron core 3, is often used. In manufacturing this type II type pressure vessel, a mold for punching the m type iron core 2 is required, and there is a disadvantage that dimensional changes are expensive.

In addition, this model causes loss when punching the material. Therefore, a method is used to punch out the e-type and create the 1st type at the same time, but in order to do this, the jf width ratio is determined by itself, and the shape is limited. It is difficult to make it to any desired length.

Furthermore, since it is formed according to this type, there are problems such as requiring a lot of work.

For this reason, there is another type of outside iron type transformer with the structure shown in Figure 2◎ In this, a silicon steel plate of the required width is wound around a rectangular former to form a hollow long sword-shaped core. This is divided into two in the horizontal direction to form a unit cut core 6 that is approximately C-shaped (also 1j: U-shaped), and two of the unit cut cores are combined to form a 2 m W-shaped core 7.8. The outer iron type transformer 5 is formed by inserting the inner core 7a into the formed coil 9 at the center thereof, and abutting both W-shaped cores 7-8M7i and t-butting. Compared to the one-piece type transformer 1, this type does not require a die for punching the steel plate and is simply fitted to a winding die, so it has the advantage that it can be manufactured into any shape.

However, when using this type, both end pieces of each unit cut core 60 are relatively long and are only joined by a butt. Otherwise, there are problems such as it is easy to curve outward, and the joint surface is not joined uniformly over the entire surface.Especially recently: H-type transformers are in demand, and for this purpose, it is necessary to increase the length and make it flat. Although this method is effective, it has the drawback that both ends of the unit cut core become longer, which increases the problems described above.

The present invention #1 was developed in consideration of these points.It has a simple structure, and when tightening for assembly, both ends of the cut core do not curve, ensuring contact of the entire joint surface, and improving efficiency. The purpose is to provide good outside iron type transformers.

That is, in the present invention, a hollow rectangular S core formed by winding a silicon steel plate of a required width is cut in the longitudinal direction to form an O-shaped unit cut core having short and small bent protrusions at both ends. Winding wire is wound around an approximately X-shaped internal iron core as a unit cut core kg, and the above a
The present invention is characterized in that an outer core having a unit-cut core of the same type is provided, and bent protrusions at both ends of the outer core are brought into close contact with both ends of the inner core.

The present invention will be described below based on embodiments shown in the drawings.

Figures 3 to 6 Regarding Example 1 of the present invention, Figure 5
The figure is a plan view thereof, and FIG. 4 is a front view.

The transformer 10 has a winding Ifj! 11 and iron core 12,
The iron core 12 includes an inner iron core 13 around which the S wire 11 is wound, left and right outer iron cores 14.15 that sandwich the inner iron core 13, and a tightening mechanism that holds the outer iron cores 14.15 crimped to the inner iron core 13. The metal fittings 16 are the main components.

The internal iron core 13 has two unit force pads 18a with a zero-shaped plane. 18bt- are joined together to form a roughly X shape, and the left and right external cores 14° and 15 are similarly flat
Formed by the unit cut cores 18o and 18a, Figure 5 shows the manufacturing procedure for the above unit force A wound core 17t is formed, and the wound core is cut in the longitudinal direction (longitudinal direction) to obtain two unit cut cores 18 and 18 each having short and small bending protrusions W619t bent in the same direction, respectively. Both unit cut cores of the inner core 13 and the outer core 14 and 15 are manufactured in the same manner.

The iron core 12 in this example is an internal iron core 1 as shown in FIG.
30 bent protrusions 19a, 19b at both ends and external core 14.
15, each of the bent protrusions 19a, 19cL and t
The butting and tightening are performed by fastening with a metal fitting 16, and the metal fitting 16 can be of any suitable shape as long as it can maintain this state. The example shown is band 2.
Although the structure 1 is shown in which both ends of the outer core 14 and 15 are tightened with tightening bolts 21, the structure is not limited to this. For example, an iron plate slightly longer than this is placed on the outside of each of the external iron cores 14 and 15, and both ends are tightened with the tightening bolts 21. The iron plate may be pressed to tighten by applying pressure.

Or the joint between the outer core 14, 15 and the inner core 13
- May be welded.

In the figure, reference numeral 22 indicates shield plates that are attached to both ends of the internal core 13.
It is designed to cover the joint with internal core 1.
This is to prevent 7 lux from leaking from both ends of the 50mm.

According to this example, the inner core 13 and the outer core 14.15
are joined at the bent protrusions, and have rigidity by making each end of the unit cut core short and short, and when tightened with the metal fittings 16, there is no deformation, and the joints are uniform over the entire surface. When arriving at 'J1j and using H', there is no possibility of vibration caused by the applied current (beat > f: occurring.Especially in this example, even if the length t is large, the bending protrusion 19a
, 19b .

Next, FIGS. 7 to 9 relate to Embodiment 2 of the present invention.
The figure is a plan view thereof, and FIG. 8 is a sectional view taken along line X-XM in FIG. 7.

The major difference between the transformer 30 in this example and the transformer 10 of the previous example is the difference in the way the outer cores 34 and 35 are attached to the inner core 35 that constitutes the core 32.

That is, the internal iron core 33Fi and the two C-shaped unit cut cores 36#L and 36bt- are combined to form an X-shape as in the previous example, and the external iron core 34.
C-shaped unit cut cores 36o and 36tl that constitute 35
is brought into contact with the

In other words, the bent protrusions 57a, 5 at both ends of the internal core 330
7tzD both [external core 34.351Z on surface 38.39]
The bent protrusions N57o and 37eLt at both ends are brought into contact with each other and are fastened using the fastening fittings 40. In this case, as shown in the ninth row, 11@a of the outer cores 34 and 35 is the bent protrusion 37a of the inner core 36.

37bQ) Sieve size is preferably the same as b.

In the figure, 31Fi indicates the winding, and 41 indicates the shield plate. In this example, the bent protrusions are short and small as in the previous example, so the joints of the inner and outer cores are securely crimped, and vibrations (whirrs) during use. ), and the windings are housed in the bent protrusions at both ends of the outer core as well as the inner core on both sides, so that the transformer F! It is a cube whose four circumferences and upper and lower surfaces are substantially flat9, so it can be packed into a compact shape.

Furthermore, the cross-sectional shape of the winding wound around the internal core is approximately similar to the cross-sectional shape of the internal core, and although the two unit cut cores forming the internal core are stacked one above the other, their thickness is greater than their width. The transformer can be narrow and thus flat (thin).

As described above, according to the present invention, a long sword-shaped wound core is cut in the longitudinal direction to form a 0-shaped unit force pad having short and small bending protrusions g at both ends, and two of the cut cores are arranged as X. Wrapped around a shaped internal iron core! I was wound around the inner core, and an outer core with a similar 0-type cut core was placed on both sides of the inner core, which was then tightened, so that the joints of each cut core were short and small bent protrusions. , and has rigidity, so that even when tightening, the protruding portion is pressed uniformly over the entire surface without causing deformation such as curvature, and therefore there is no risk of vibration (beat) occurring during use. Therefore, it is possible to increase the length of the transformer, and it is suitable for making a flat and thin transformer.

[Brief Description of the Drawings] Figures 1 and 2 are schematic plan views of different conventional examples, Figures 3 to 6 relate to Embodiment 1, Figure 6 is a plan view, and Figure 4 is a front view. The fifth factor is an explanatory diagram of the manufacturing procedure for unit force
The figures relate to Example 2, and FIG. 7 is a plan view, FIG. 8 is a sectional view taken along line X-X in FIG. 7, and No. 8N is an exploded perspective view of the iron core. 10.30...Transformer 11.31...Winding 13.33...Inner core 14.15.34.35...-Outer core 17...Wound core 18a, 18b. 1a0.1aa・1 unit cut core 1
9a, 19b, 19o, 19a--bending protrusion 56a
, 36b, 3 (So, 3611- Unit cut core 37
a. 37b. 57a.

Claims (1)

[Claims] A hollow rectangular wound iron core formed by winding a silicon steel plate of the required width is cut in the longitudinal direction to form a C-shaped unit cut core having short and small bending protrusions on both MKs, and the above two unit cut cores are 1 piece of winding around an internal core made into a roughly X-shape.
- An external iron core having the above-mentioned C-shaped unit cut core 1 is provided on both sides sandwiching the internal iron core, and the bent protrusions at both ends of the external iron core are in close contact with both ends of the internal iron core. Transformer〇