JPS6030109A - Transformer - Google Patents

Abstract

PURPOSE:To obtain a shell type transformer which has a simple structure and is suitable for mass-production and has a high efficiency by a method wherein a transformer core is composed of an I-shape internal core and a pair of channel- shape external cores. CONSTITUTION:A toroidal core, composed of a silicon steel plate wound and jointed around a long rectangular winding frame, is cut, for instance, along the longitudinal direction to form left and right channel-shape (O-shape) external cores 13, 15. The bent parts 14, 16 at their ends have minimum length enough to hold the winding 11. The respective jointing end surfaces 20, 21 of the external core 13, 15 are parallel to each other and an internal core 12 has a long rectangular shape. Therefore, whole surfaces of the respective jointing end surfaces 20, 21 are uniformly and easily pressure-welded. The bent parts 14, 16 at the ends of the external cores 13, 15 are formed short and have regidity and the tightening force of a tightening metal fitting 17 is applied along the axial direction of the bent parts 14, 16. Therefore, the core is not deformed by the tightening force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transformer, particularly an outside iron type transformer. Generally speaking, an outside iron type transformer is as shown in FIG.
An 11 type transformer 1 is often used, which is a combination of an 1 type iron core 2 and a 1 type iron core 3. In manufacturing this 11-type transformer, a mold for punching out the B-type core 2 is required, which has the disadvantage of being expensive due to dimensional changes.

Osuke r state 1rei r H Mochizuru Tsutomu Kugiyokui 1st match
1 tyl is produced, and for this reason, a method has been adopted in which the l1jli is also molded at the same time as the I11 die is punched, but the aspect ratio is determined by the I11 die and there are shape IC restrictions. Furthermore, according to this model, the grooves are formed by inserting one L-shaped core 3i alternately from the left and right sides into a pre-formed winding bobbin during assembly, and therefore there are gaps between each steel plate. It has the disadvantage that the magnetomotive force becomes large and vibrations (so-called beating phenomenon) occur.For this reason, there is another type of external iron type transformer with the structure shown in the second case. It is wound around a spring shape to form a long circular wound core, which is laterally divided into two to create approximately 0 or U shape.
The unit winding core 5 is made into a shape, and the unit winding core 5t-4 pieces (
In other words, the inner core 6 and the outer core 7.7 are formed, and a coil 8 is attached to the inner core 6 to form an outer iron type transformer 4. Compared to the 11-type transformer 1, this has the advantage that it can be manufactured at low cost and into any shape because it does not require a die for punching the steel plate and is simply wound around a winding form.

However, it takes a considerable amount of time and effort to manufacture a wound core with a long Kusunoki circle, and it is not possible to reduce the cost sufficiently.

The present invention has been made in consideration of these points, and an object of the present invention is to provide an efficient outer iron type transformer Mt that has a simple structure, is suitable for mass production, and is highly efficient.

That is, the gist of the present invention is that the invention consists of a pair of channel-shaped outer cores and a single type 1 inner core, and a Ti winding is wound around the inner core. and both ends of the outer core are closely attached to both ends of the inner core.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

3 to 5 show a transformer according to the present invention, with FIG. 3 being a plan view, FIG. 4 being a front view, and FIG. 5 being a right side view.

The transformer 10 includes a winding 11, an inner core 12 around which the winding 11 is wound, and left and right outer cores 13.1 sandwiching the core 12.
45 as the main body, and the external core 15.15 is the tightening fitting 17.
It is fastened to the internal iron core 12. Internal core 1
2 is constructed by cutting silicon steel plates into strips having the same width and length and stacking and joining them.

The left and right outer WI5 @ cores 13.15 are made by bonding silicon steel plates to long rectangular winding formers, and moving the formed wound cores, for example, in the vertical direction (
(longitudinal direction) to form channel-shaped (type 0) left and right external cores 13.15, with bent portions 14 at both ends.
．． 1 (, is the minimum length that can accommodate the winding 11. The outer cores 13 and 15 have the same dimensions and the same shape, and the perspective view of FIG. 7 shows only one of the outer cores 13 and 15. The tightening fittings 17 can be of any suitable shape. Although the illustrated example shows a structure in which both ends of the belt-shaped band 18 are tightened to the tightening port 19, the structure is not necessarily limited to this. An iron plate slightly longer than this may be placed on the outside of each of the in-core cores 13 and 15, and both iron plates may be tightened with bolts.Alternatively, the outer iron core 13
．． 15 and the internal core 12 may be welded.

Each joint end face 20.2 of the external core 13.15
1 are parallel to each other, and the inner core 12 is strip-shaped. Therefore, it is easy to press the joint end surfaces 20.21 of the outer cores 13 and 15 uniformly over the entire surface. The bent portions 14 and 16 at both ends are formed to be short and small as described above, and have rigidity, and the fastening metal fittings 17
The tightening is applied along the lines of force and the axis of the bent portion 14, 16, and therefore there is no deformation (for example, curvature) due to the tightening.

In the figure, reference numeral 22 indicates shield plates that are attached to both sides of the internal core 12, and the internal core 12 and the external core 13.
8 and 9 show a modification of the present invention.

The transformer 25 of this example has notches 27 formed at both ends of an internal core 260 into which the external cores 28 and 301 are inserted.

According to this example, the inner core 26 and the outer cores 28 and 30
In addition, the bending of both ends of each of the outer cores 2B and 50 can prevent the portions 29 and 51 from bending inward due to tightening force.

FIG. 10 shows another modification of the invention.

Each of the above-mentioned sides shows a structure in which the outer core is pressed against the inner core @ the inner core, but the transformer 35 of this example has the bent portions 38 and 40 of both ends of the outer core 57 and 59 in close contact with each other. , the bend has a structure in which the internal core 36 is pressed into contact with the inner surface of the portion. In this case, it is preferable that the entire length of the inner core 36 be a hole slightly longer than between the bent portions of the outer core 37 and 39, and the inner core 36' ft be press-fitted between the outer cores 37 and 39. Alternatively, as shown in chain @41, the outer core 57.39 may be provided with an inner core insertion groove II-K.
You may.

The manufacturing procedures for the internal core and external core in each of the above-mentioned modifications are the same as those in the embodiments shown in FIGS. 3N to 7. Other identical parts are given the same reference numerals and explanations are omitted. As described above, according to the present invention, a one-type internal iron core,
Since the transformer core is configured with a pair of channel-shaped outer cores, the inner core has a simple cedar shape and can be easily manufactured using an ordinary cutting machine, and the outer core is wound into a single rectangular shape. By making a rolled iron core and cutting it lengthwise, both the left and right sides can be manufactured at the same time. Therefore, it is easy to manufacture.
It is inexpensive and extremely suitable for mass production.

In addition, during assembly, the external core is tightened by a butterfly, and force is applied in the axial direction to the bent portions at both ends of the external core, and the bent portions are relatively short and have a southerly shape. , and since a pressurizing force is applied, there are advantages such as there is no possibility of vibration occurring when electricity is applied.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic plan views of different conventional examples, Figures 3 to 7 relate to embodiments of the present invention, Figure 3 is a plan view, Figure 4 is a front view, and Figure 5 is a schematic plan view of different conventional examples. Figure 6 is a right side view, Figure 6 is an exploded plan view of the main parts, Figure 7 (a) is one internal iron core, the lead-out (b) is one external iron core, and Figure (0) is a tightening metal fitting. Figures ε and 9 show modified examples of the present invention, FIG. 8 is a plan view thereof, FIG. 9 is a plan view of the internal core, and FIG. 10 shows another modified example. FIG. 10.25.35...Transformer 12/26/66...Inner core 13.15.28.50.37.59...Outer core Patent applicant Kuniyuki Chino

Claims (1)

[Claims] An L winding is wound around a pair of channel-shaped (C-shaped) external cores, one type 1 internal core, and a p1 internal core,
A transformer characterized in that the outer cores are respectively disposed on both sides of the inner core, and both ends of the outer core are in close contact with both ends of the inner core.