JP2531512Y2 - Resin molded coil for transformer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded coil for a transformer.

[0002]

2. Description of the Related Art In FIG. 4, reference numeral 1 denotes a winding core, 2 denotes a secondary winding wound on the winding core 1, 2a denotes a winding end of the secondary winding 2, 3;
Is an insulating layer made of an insulating film, and 5 is a primary winding wound on the insulating layer 3 and is molded with a synthetic resin such as an epoxy resin to form a resin molded coil.

[0003]

The resin mold coil of this type is heated and dried before the resin casting operation in order to remove moisture which impairs the resin impregnating property of the coil portion. 3, the primary winding 5 undergoes thermal expansion, a gap is formed between the primary winding 5 and the insulating layer 3, and the primary winding 5 rattles. If such play occurs, eccentricity occurs at the time of injecting the resin, resulting in unevenness of the inner thickness of the resin and cracks, thereby easily causing dielectric breakdown.

The present invention has been made to solve this problem, and it is intended to prevent the looseness of the winding due to the gap between the insulating layer and the winding caused by heating and drying before the resin casting operation. It is an object of the present invention to provide a resin molded coil for a transformer capable of performing the following.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a secondary winding wound around a winding core and a secondary winding.
An insulating layer provided on the wire and a plurality of layers wound on the insulating layer
Transformer formed by resin molding the primary winding and
In the axial direction of the above core in the resin mold coil for
Part is wound around the insulating layer and fixed in the circumferential direction of the winding core.
An elongated band-shaped main part and the above-mentioned cores on both sides of the band-shaped main part,
Provided at predetermined intervals in the circumferential direction of the
Resin-impregnated member having a plurality of pieces extending in the direction
The strip-shaped main part is provided on one side of the strip-shaped main part.
And on the other side, the insulating layer and the first layer of the primary winding, respectively.
Between the piece extending between the first winding and the first winding of the primary winding.
The first layer is pulled out and folded along the outer surface of the first layer.
And the piece extending between the second layer and the second layer are alternately positioned.
And the insulating layer and the primary winding from the one side.
And one of the primary windings from the other side.
So that the piece extending between the second layer and the second layer faces each other.
I did .

[0006]

According to the present invention, one side extending from both sides of the resin impregnated member fixed to the insulating layer with an adhesive is composed of the insulating layer and the primary winding.
Each intersection between and between the primary winding first and second layers with layers th
Each other extends to hold the primary winding.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 4 denotes a resin-impregnated member, and as shown in FIG.
It is provided at a predetermined interval on each side and is directly in contact with the belt-shaped main portion 4A.
And a piece 4a extending in the intersecting direction.
Parts are to respectively opposite, provided symmetrically with respect to the center of the strip main portion 4A, Oh has become loose bone shape.

[0009] coil of the present embodiment, after forming the insulating layer 3, Oite a strip main portion 4A of the resin-impregnated member 4 in the central portion of the insulating layer, the solid was deposited by an adhesive wound the insulating layer , And the primary winding 5 is wound thereon. At this time, one of the belt-shaped main portions 4A
Each piece portion 4a extending from the side is extended between the first layer every second insulating layer 3 and the primary winding 5, the primary winding 5, as each remaining fragment portions 4a shown in FIG. From the first layer winding . Each piece 4a extending from the other side of the band-shaped main part 4A is
To extend between the insulating layer 3 and the primary winding 5 of the one side
From the first layer of the primary winding
Make sure to start up, and the remaining pieces are insulating layers and primary windings.
And extend between them. Moreover, rising was fragment portions 4a in each side winding the second layer 5a of the primary winding thereon by bending in the direction indicated by the arrow B in each Figure 2.

The resin-impregnated member 4 is formed, for example, by punching rectangular holes at predetermined intervals on a longitudinal side portion of a rectangular plastic film or the like by a press or the like, and then cutting off the longitudinal side edges.

In the present embodiment, the resin-impregnated member 4 has its belt-shaped main portion 4A fixed to the insulating layer 3 with an adhesive .
A plurality of support sections extending from both sides, the side of each from between the first layer of windings of the strip portion and the primary winding 5 extending between the first insulating layer 3 and the primary winding 5 Pulled out and along the outer surface of the first layer
Piece that is folded back and extends between the first and second layers
Are located alternately, so that the insulating layer and the primary
The part extending between the first layer and the winding is the winding force of the primary winding.
Is fixed to the insulating layer together with the belt-shaped main part by the primary winding.
The piece extending between the first and second layers is the primary winding itself.
Prevents the core from moving in the axial direction from the belt-shaped main part,
Insulation from the primary winding in combination with the fixing of the belt-shaped main part to the insulating layer
There is no gap due to misalignment with the layer. Also, with the insulating layer
A core shaft is provided on both sides of a piece extending between the primary winding and the first layer.
The space between the insulation layer and the primary winding.
The impregnating property of the resin into the space is improved. Therefore, the insulating layer 3
The primary winding 5 does not rattle with respect to the insulating layer 3 even when cured and shrunk as described above, and the resin can be injected without causing eccentricity of the primary winding 5.

In this embodiment, the strips on each side of the belt-shaped main portion are provided.
Only the portions 4a alternately extend between the insulating layer 3 and the first layer of the primary winding and between the first layer and the second layer of the primary winding . since there is also of the wrap a layer for each layer,
There is no risk of impairing the resin impregnation.

[0013]

As described above, according to the present invention , a plurality of pieces extending on both sides from a resin impregnated member fixed to an insulating layer with an adhesive are alternately provided on each side with the insulating layer and the primary winding. between the line
And between the first and second windings of the primary winding.
Since it extends between each layer and holds down the primary winding,
Even if the insulating layer hardens and shrinks due to heating and drying, resin injection can be performed without causing eccentricity of the primary winding.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state before winding a second layer of a primary winding according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of the embodiment.

FIG. 3 is a plan view of the resin-impregnated member in the above embodiment.

FIG. 4 is a perspective view of a conventional resin mold coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core 2 Secondary winding 3 Insulating layer 4 Resin impregnating member 4A Strip main part of resin impregnating member 4a One part of resin impregnating member 5 Primary winding 5a Primary winding 2nd layer

Claims (1)

(57) [Scope of request for utility model registration] 1. A secondary winding wound around a core, and the secondary winding
An insulating layer provided on the winding and a plurality of layers
Transformation formed by resin molding of the rotated primary winding
In a resin mold coil,
Wound around the insulating layer in the intervening part, in the circumferential direction of the core.
And the above-mentioned windings are provided on both sides of the main band.
Provided at predetermined intervals in the circumferential direction of the core,
Resin-impregnated member having a plurality of pieces extending in the axial direction
And each piece of the band-shaped main portion is provided on one side of the band-shaped main portion.
And the insulating layer and the first layer of the primary winding on the other side, respectively.
Between the piece extending between the first winding and the first-layer winding of the primary winding.
Pulled out from the first layer and folded back along the outer surface of the first layer
The pieces extending between the eyes and the second layer are alternately located
And the insulating layer and the primary winding from the one side.
And the primary winding of the primary winding from the other side.
The piece extending between the first layer and the second layer faces each other.
A resin molded coil for a transformer, characterized in that: