JPS6038257Y2 - resin molded coil - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a resin molded coil used in transformers, reactors, etc.

In general, the multi-layer wound resin molded coil 1 is constructed by dividing each layer 2 into multiple sections and connecting the sections 2a in series in order to limit the interlayer voltage and improve the impregnability of resin, etc., as shown in Fig. 1. It is often constructed by

In the coil 1 having such a configuration, a certain potential difference occurs between each section 2a depending on the number of sections, so in order to ensure insulation between them, a certain insulation distance 1 is maintained as shown in Fig. 1. In addition, resin 3 was impregnated between them.

Therefore, this type of coil 1 can be downsized by reducing the insulation distance 1 between the sections 3 and 2a while ensuring insulation between the sections.

The present invention aims to reduce the size of the coil by reducing the insulation distance between each section.

An embodiment of the present invention will be described below.

FIG. 2 shows a coil 5 according to the present invention, which includes an inner insulating layer 6 constituting an inner peripheral wall, an outer insulating layer 7 constituting an outer peripheral wall, and a layer between these insulating layers 6 and 7. It is composed of a plurality of wound layers 9 formed by sequentially winding the conductor 4 with an interlayer insulating material 8 interposed therebetween.

Each winding layer 9 is divided into multiple sections 9a, each section 9a is formed by winding the conductor 4 to a predetermined winding width, and each section 9a is arranged in alignment with each section 9a of the winding layer located inside. There is.

Note that each section 9a of each winding layer is connected in series.

The interlayer insulation material 8 described above is applied to each section 9 of the inner wound layer 9.
A and each section 9a of the outer winding layer 9 and used to insulate each winding layer, and the length in the axial direction is larger than the winding width of the section 9a.

A resin 3 is filled between the sections 9a to insulate them.

The coil 5 according to the present invention includes an insulating member 10 covering a plurality of sections 9a of each aligned winding layer.

The insulating member 10 is formed into a disk shape with a circularly punched center portion, and is respectively latched to both end surfaces of the plurality of interlayer insulating materials 8 located between the plurality of aligned sections 9a. In addition, each inner circumferential edge and outer circumferential edge are bent so as to cover the plurality of aligned sections 9a.

As the resin 3, an epoxy resin or the like is used, for example, and as the insulating member 10, a material having a higher insulation function than the resin 3, such as polyamideimide, is used.

Therefore, the insulating function of the insulating member 10 is
The insulation distance 1' between each section 9a can be made smaller than the insulation distance 1 shown in FIG. It can be made smaller than the coil 1.

Incidentally, when the insulating member 10 is made of a crepe-like insulating material, the inner and outer edges of the insulating member 10 can be easily bent.

As explained above, according to the present invention, the sections of each winding layer that are aligned are covered with an insulating material that has a higher insulating function than the resin filled between the sections, so even if the insulation distance between each section is small, the distance between these Therefore, especially in the case of a coil composed of winding layers with a large number of sections, there is a large possibility of miniaturization, so the transformer etc. in which the coil was used can also be miniaturized. Therefore, its industrial value is very large.

[Brief explanation of the drawing]

FIG. 1 is a partial longitudinal sectional view of a conventional resin molded coil, and FIG. 2 is a partial longitudinal sectional view of an embodiment of the resin molded coil according to the present invention. 1.5...Resin molded coil, 2,9...
- Winding layer, 2a, 9a...Section, 3...
・・・Tsuki ML 8・・・・・・One point of garlic...
...Insulating material. In addition, the same is shown in the figure.

Claims (1)

[Scope of utility model registration request] In a multilayer resin-molded coil in which each winding layer is divided into multiple sections and resin is filled between the sections, the aligned sections of each winding layer are each covered with an insulating member having a higher insulation function than the resin. A resin molded coil characterized by a small insulation distance between sections.