JPS5923388Y2 - barrier tape - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a barrier tape used for insulating between different polarity coils in an insulation transformer.

In general, an insulating transformer in which a primary coil and a secondary coil are wound around a bobbin is as shown in Fig. 1.A primary coil 2 is wound around a bobbin 1, an insulating tape 3 is wrapped on top of the primary coil 2, and a secondary coil is wound on top of the primary coil 2. 4 is wrapped around it.

Although the insulation 1 to the lance have a simple structure, they have poor insulation inside the flange 1a of the bobbin 1, and when a high voltage is applied between the primary coil 2 and the secondary coil 4, the insulation tape 3 In some cases, the wound part caused electrical discharge in the direction of the arrow, destroying the transformer.

Therefore, in order to improve the insulation, as shown in Fig. 2, after wrapping the primary coil 2 and wrapping the insulating tape 3, a resin molded product as shown in Fig. 3 is placed inside the flange 1a of the bobbin 1. A barrier 5 is fitted and a secondary coil 4 is wound around it to improve insulation at both end faces of the winding.

However, the barrier 5 in the above configuration differs depending on the type of winding diameter of the primary coil 2.
It is necessary to prepare several types of barriers 5 corresponding to the diameter of the winding, which has the drawback of increasing the cost of the molding die.

Furthermore, if there are variations in the winding diameter of the primary coil 2, a gap may be created between the barrier 5 and the winding diameter of the primary coil 2, or conversely, the opening of the barrier 5 may be too open, resulting in poor fitting. This also causes the secondary coil 4 to become unwinded.

Furthermore, there are other drawbacks such as the fact that the effective winding space of the coil is reduced due to the occupation of the barrier 5.

This invention was made based on the above-mentioned circumstances, and provides a thin barrier tape that is interposed between a primary coil and a secondary coil wound around a bobbin to improve insulation.

Hereinafter, embodiments of this invention will be explained in detail with reference to FIGS. 4 to 6.

FIG. 5 shows a barrier tape 10 interposed between the primary coil 2 and the secondary coil 4, and a resin molded barrier 12 having an approximately L-shape is attached to both ends of an adhesive insulating tape 11. It is something.

The barrier 12 is a molded product with excellent insulation and flexibility and has an appropriate thickness.

Furthermore, since the barrier 12 is molded in one mold and the width of the barrier tape 10 can be changed arbitrarily by simply changing the width of the insulating tape 11, it can be easily changed even if the winding width of the bobbin 1 is different. can correspond to

Therefore, as shown in FIG. 6, an insulated transformer can be easily formed by winding the primary coil 2 around the bobbin 1, wrapping the barrier tape 10 thereon, and then winding the secondary coil 4.

As explained in detail above, when forming an insulated transformer by winding a primary coil and a secondary coil around a bobbin, after winding the primary coil, a thin insulating barrier is attached to both ends of the insulating tape according to this invention. Since the barrier tape is wrapped with a barrier tape fixed to the secondary coil, and the secondary coil is wound on top of the barrier tape, it has good insulation and can be used regardless of the winding diameter of the coil to be wound.

Furthermore, the area occupied by the barriers fixed to both sides of the insulating tape is small, eliminating drawbacks such as narrowing the effective winding space and eliminating the risk of winding deformation.

In addition, if the barrier tape of this invention is used, the barrier 12 is harder than the adhesive insulating tape 11, so the barrier 12 will not fall over even when wound on a coil, resulting in excellent workability, and between coils of different polarities. It is possible to produce a transformer that is very suitable for insulation at a low cost.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of an isolation transformer showing a general example;
The figure is a longitudinal sectional view of an isolation transformer showing a conventional example.
The figure is a perspective view of the barrier, which is the main part of FIG. 2, FIG. 4 is a sectional view showing an embodiment of the barrier according to this invention, FIG. FIG. 6 is a longitudinal sectional view showing an embodiment of the isolation transformer according to this invention. 1...Bobbin, 1a...Flange, 2
...Primary coil, 4...Secondary coil,
10...Barrier tape, 11...Adhesive insulating tape, 12...Barrier.

Claims (1)

[Scope of utility model registration request] A barrier tape characterized by having a barrier made of an L-shaped resin molded product affixed to both ends of an adhesive insulating tape.