JPS6012256Y2 - electrical equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electrical device in which the lead-out of a winding wound around the outside of an iron core used in a transformer or an axle is improved.

In transformers used in switchboards and the like, the secondary winding often uses a sheet-wound coil of copper or aluminum because of its low voltage and large current.

However, in the case of this sheet-wound coil, there may be problems in terms of mechanical strength when using the thin sheet foil as the lead as it is, in which case the bar is welded to the sheet foil only at the lead. I am using it.

However, when the sheet is wound around a cylindrical core,
A flat exit bar that does not fit well into the circle would have to be used.

Therefore, the space factor deteriorates, the average length of the winding wire and the finished dimensions of the number of turns increase, which not only increases the size and weight of the entire device, but also increases the loss generated.

Here, a transformer will be described as an example of a conventional electric device based on the drawings.

Figure 1 shows a part of the transformer, and Figure 2 shows the 1st part of the transformer.
FIG. 3 is a cross-sectional view taken along line A-A in the figure.

In both FIGS. 1 and 2, reference numeral 1 denotes an iron core that forms the magnetic circuit of the transformer.

This iron core 1 is covered with an insulating tube 2 that forms a core,
A high voltage winding 4 is wound around the outer circumferential surface of the coil with a low voltage winding 3 and a spacer 5 interposed therebetween.

FIGS. 3 to 5 are diagrams for explaining a conventional lead-out method for electrical equipment, and FIG. 3 is a plan view of a low-voltage winding portion of the electrical equipment.

FIG. 4 is a sectional view taken along line B--B in FIG. 3.

As shown in FIG. 3, stepped portions 1a are provided at the corners of the iron core 1 to improve the space factor, and on the outer peripheral surface of the iron core 1, as shown in FIG. It is covered with an insulating tube 2 which serves as an insulator and also serves as a core.

A sheet-like low voltage winding 3 is wound around the outer peripheral surface of the insulating tube 2, and an insulating tube 6 is wound between each turn of the low voltage winding 3.

As is clear from FIG. 4, both ends of the low-voltage winding 3, that is, the starting end and the terminal end, are provided with lead bars 7a and 7, respectively.
connected to b.

FIG. 5 shows the connection relationship between the lead bar 7a and the starting end of the low voltage winding 3.

In the case of the terminal end of the low voltage winding 3 and the lead bar 7b, the lead bar 7a*7b and the starting end and the terminal end of the low voltage winding 3 are connected to each other in the same way.

By providing such lead-out bars 7a and 7b,
The current flowing from the lead bar 7a passes through each turn of the low voltage winding 3 and is taken out from the lead bar 7b.

The same applies to the high voltage winding 4 shown in FIGS. 1 and 2.

In such a conventional structure, the lead bars 7a, 7
Since b has a flat plate shape, it does not fit well with the circular insulating tube 2 shown in FIG.

As shown in Figure 3, the space factor becomes worse and the -
The average winding length increases.

For this reason, as already mentioned, the weight of the winding and the loss caused increase.

Furthermore, the winding width at the location where the lead bars 7a, 7b are attached becomes larger.

Therefore, the required minimum dimension of the high voltage winding 4 wound on the outside of the low voltage winding 3 is determined by the part where the winding width is large, so the outer diameter of the high voltage winding 4 becomes large and the weight increases. As the core 1, low voltage winding 3, and high voltage winding 4 are housed in the tank (not shown), the transformer as a whole becomes larger and heavier. Become.

This idea was developed in consideration of the above points, and by cutting a part of the insulating tube and inserting it into the cut part, the space factor can be improved. The purpose is to provide electrical equipment that is small, lightweight, and has low loss.

Hereinafter, embodiments of the electrical equipment of this invention will be described based on the drawings.

The electrical equipment referred to here refers to equipment with windings wound around an iron core, such as transformers and reactors.In the following explanation, we will use a transformer as an example. I will mainly discuss the iron core, photography, and low-voltage winding that make up the transformer.

FIG. 7 is a perspective view showing a circular imaging tube applied to one embodiment of the present invention, which corresponds to the insulating tube 2 shown in FIGS. 1 to 6 above.

Also in the following description, it will be referred to as the insulating tube 2.

This insulating tube 2 is coated on the outer circumferential surface of the iron core 0 (see FIG. 9), and is coated on the outer circumferential surface of the iron core 1 in the same manner as described in the description of the conventional example above.

However, in this invention, in particular, one end of the insulating tube 2, ie, the upper line in FIG. 7, is cut to a predetermined width and length, and a notch 2a is provided.

As shown in FIG.
a is fitted.

With the insulating tube 2 fitted with such a lead-out bar 7a being coated on the outer circumferential surface of the iron core 1 so that the notch 2a is located at one end in the stacking direction of the iron core 1, a low The starting end of this low-voltage winding 3, on which the high-voltage winding 3 is wound, is passed between the lead bar 7a and the notch 2a,
In the same manner as shown in FIG. 5, it is connected to the outlet bar 7a as shown in FIG. 11.

FIG. 9 is a plan view of the outer peripheral surface of the iron core 1 covered with the insulating tube 2 around which the low-voltage winding 3 shown in FIG. 8 is wound.

As is clear from Fig. 9, the iron core 1 adopts a stepped iron core to improve the space factor.
Furthermore, the present invention takes advantage of the fact that there is a space between the iron core 1 and the circular insulating tube 2 located in the stacking direction of the iron core 1.

In this case, an insulating material 1 is placed between the iron core 1 and the insulating tube 2.
2 is required.

Furthermore, as is clear from FIGS. 9 and 10 (cross-sectional view taken along line C-C in FIG. 9), an insulating tape 6 is placed between each turn of the low-voltage winding 3. It is wrapped.

The terminal end of the low voltage winding 3 is connected to the lead bar 7b in the same manner as in FIGS. 3 and 4.

In this way, the low-voltage winding 3 wound and connected to the extraction bar 7aw7b is wound in a manner better adapted to the imaging than the conventional winding shown in FIGS. 3 and 4, and the space factor is improved. This reduces the average length of the windings, reduces weight, and reduces losses.

Although the above explanation has been made using the low voltage winding of a transformer as an example, the same applies to the high voltage winding, and it goes without saying that the present invention can also be applied to reactors and other electrical equipment.

As described above, according to the electrical device of this invention, a part of the lead-out bar is fitted into the insulating tube that forms the imaging tube, and the end of the winding is passed between the lead-out bar and the insulating tube. Since the terminal is connected to the lead bar, the winding width of the lead part appears to be smaller, the average length and outer diameter of the high voltage winding wound on the outside thereof are also smaller, and the tank size is also reduced.

Along with this, it has excellent advantages such as being able to be made smaller, lighter, and lower in cost, as well as having lower loss.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing part of the windings and core of a conventional transformer, Figure 2 is a cross-sectional view taken along line A-A in Figure 1, and Figure 3 is a cross-sectional view of a conventional transformer. A plan view showing the arrangement relationship of the iron core, insulating tube, and winding of the device, Figure 4 is taken from B-B in Figure 3.
5 is a side view showing the connection between the low-voltage winding and lead bar in the transformer shown in FIGS. 3 and 4; FIG. 6 is a photograph taken in a conventional transformer. FIG. 7 is a perspective view showing the shape of the insulating tube as shown in FIG. 6, and FIG. 8 is a perspective view showing the shape of the insulating tube in FIG. FIG. 9 is a perspective view showing the device for winding the windings; FIG. 9 is a plan view showing the arrangement of the iron core, insulating tube, and windings in the electrical equipment of this invention; and FIG. 10 is the line C-C in FIG.
FIG. 11 is a cross-sectional view taken along a line, and a side view showing how the windings and lead bar are connected in FIGS. 9 and 10. 1... Iron core, 2... Insulation tube, 2
a... Notch, 3... Low voltage winding, 4...
...High voltage winding, 5...Spacer, 6...
...Insulating tape, 7a, 7b... Leading bar, 12... Insulating material. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] An iron core that forms a magnetic circuit, an insulating tube that is coated on the outer circumferential surface of this iron core to form a winding core and has a notch at one end in the stacking direction of the iron core, and a lead bar that is partially fitted into the notch of this insulating tube. . An electrical device comprising a winding wire wound around the outer peripheral surface of the insulating tube so that its terminal end is joined between the cutout portion and the lead bar.