JPS61234512A - Linear winding - Google Patents

Abstract

PURPOSE:To enable the economical design by reducing an interval between the linear conductors wound in parallel to the minimum size necessary for insulation by interposing the spacer consisting of an insulating material of soft property which can be deformed by a fastening pressure between the winding layers between the linear conductors under the condition that the gaps between the linear conductors are deformed in a manner those gaps are almost filled with the spacers. CONSTITUTION:Two pieces of linear conductors 5a and 5b are wound in parallel together with a series of wide interlaminar insulating materials with the distance (d) corresponding to the necessary insulation distance between the linear conductors and the linear winding wound necessary times is composed. At this time, a spacer 11 consisting of the insulating material of soft property which can be deformed by a fastening pressure between the winding layers is involved with and between the linear conductors 5a and 5b together. For such spacer 11, the thread made of cotton, glass fiber, or synthetic fiber such as polyester fiber is used. The thickness of the thread for use is different according to the thickness of the linear conductors 5a and 5b and when one thread is used, one that is thicker than the thickness (t) of the conductor is used and when the thickness (t) is thick, at least two threads are used.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a strip-wound wire used in a transformer, etc., and particularly to a strip-wound wire formed by winding a plurality of strip conductors in parallel together with a series of interlayer insulation materials. The present invention relates to spacing means suitable for insulating strip conductors from each other when constructing a wire.

[Background of the Invention] An example of a transformer winding using parallel windings is shown in FIG.

In the figure, 1 is the iron core, 2a and 2b are the upper and lower two divided windings that constitute the secondary winding, 3 is the primary winding, 4 is the iron core, a bobbin that insulates between the windings, and 5a and 5b are the upper and lower 2 windings. A strip conductor that is wound in rows and constitutes the divided windings 2a and 2b, 6 is an interlayer insulating material, 7a
Of the upper and lower divided windings 2a and 2b, 7b is a line lead wire connected to the winding start end of the upper winding 2a, 7b is a line lead wire connected to the winding end of the lower winding 2b, and 8 is a line lead wire connected to the winding end of the lower winding 2b. is an intermediate connecting conductor that connects the winding end of the upper winding 2a and the winding start end of the lower winding 2b so that the divided windings 2&, 2b are connected in series.

A strip winding made of such a two-row split winding is made by winding two strip conductors 5a and 5b in parallel together with a series of wide interlayer insulating material 6, and is different from a normal strip winding made of a single strip conductor. Compared to wire, the number of rotations of the winding machine is halved to obtain the required number of windings, and the length of the interlayer insulation material 6 is also halved, reducing manufacturing costs. It is used.

The strip conductors 5a and 5b constituting this parallel-wound winding are wound at intervals in order to insulate each other, but during an instantaneous short circuit test of the winding, the strip conductors 5a and 5b are pulled from the axis of the winding due to electromagnetic force. It is necessary to insert a spacer to maintain the distance so that they do not shift in the direction and come into contact with each other.

Conventionally, as shown in FIG. 8, a hard plate-shaped insulating material such as a press board is cut into narrow pieces according to the spacing d between the strip conductors 5a and 5b wound in parallel, and the plate thickness of the strip conductors 5a and 5b is adjusted. The spacer 9 was stacked so as to have approximately the same thickness as t and wound between the strip conductors 5a and 5b, and the spacer 9 filled the gap 10 between the strip conductors 5a and 5b.

However, when this parallel winding is used as a secondary winding of a transformer, the voltage applied between the parallel-wound conductors 5a and 5b is approximately 200V at maximum.
While it is sufficient for the insulation distance between b to be about 1 to 31r11, it is impossible to cut plate-shaped insulating materials such as pressboard into such narrow widths, and the width inevitably becomes 4n or more. In the conventional parallel-wound winding using this as the spacer 9, the distance d between the strip conductors becomes wider than necessary, and as a result, the height of the winding (h) in FIG. 7 becomes high. Not only did it require a large amount of winding materials such as the interlayer insulating material 6, but the length of a part of the core of the iron core 1 also became longer due to the increased height of the winding, resulting in an uneconomical design. .

[Object of the Invention] An object of the present invention is to provide a strip winding wire that can reduce the spacing between strip conductors wound in parallel to the minimum dimension necessary for insulation, and that can be designed economically. .

[Summary of the Invention] The present invention provides a strip winding formed by winding a plurality of strip conductors in parallel together with a series of interlayer insulating materials, which is made of an insulating material made of a flexible material that deforms due to the tightening pressure between the winding layers. It is characterized in that the spacer is interposed between the strip conductors in a deformed state so that the gap between the strip conductors is substantially filled by the spacer.

[Embodiments of the Invention] Examples of the present invention will be described below with reference to FIGS. 1 to 6.

FIGS. 1 to 4 are cross-sectional views showing how spacers of various embodiments having different shapes are inserted, and all of them are examples in which two strip conductors are wound in parallel.

FIG. 5 is a drawing of another embodiment applied to the case where three strip conductors are wound in parallel, and FIG. 6 is a perspective view showing a state in the middle of winding in one embodiment of the present invention.

According to one embodiment of the invention, two strip conductors (aluminum, copper, etc.) 5a, 5b, as shown in FIG. They are wound in parallel with an interval d corresponding to the required insulation distance (1 to 3 vx) between them, forming a strip winding with the required number of turns.

At this time, in order to maintain the distance d between the strip conductors 5a and 5b, a spacer 11 made of a flexible insulating material that is deformed by the tightening pressure between the winding layers is wound together between the strip conductors 5a and 5b.

As such a spacer 11, a thread (yarn) made of, for example, cotton, glass fiber, or synthetic fiber such as polyester fiber can be used. The thickness of the thread used) is the thickness of the strip conductors 5a and 5b (0.4 to 2.0
+ m), but as shown in Figure 1, when using one thread, use one thicker than the plate thickness t,
When wound between the winding layers, the spacer 1 is crushed by the clamping pressure between the layers, and the gap 12 between the strip conductors 5a and 5b is
1 until it is almost filled.

When the plate thickness t is large, the spacer 11 can be formed using two or more threads as shown in FIG.

By using threads made of various fibers as spacers, there is no need to cut the pressboard and overlap it to match the thickness of the strip conductor, which is required for conventional spacers, making it an inexpensive commercially available product. By simply changing the thickness and number of threads depending on the thickness of the strip conductor, it is possible to fill gaps as narrow as 1 to 3 mm, where conventional spacers could not be used.

The spacer 11 may be made of fibers processed into a flat tape as shown in Figure 3 instead of thread, or made of synthetic resin such as vinyl chloride in the form of a hollow tube or sponge as shown in Figure 4. It is also possible to use materials that have been processed to have flexibility.

The spacer 11 filled in the gap 12 between the strip conductors 5a, 5b in this way is hardened by the impregnated face when the winding is face-treated to prevent the strip conductors 5a, 5b from shifting. Provides sufficient mechanical strength.

In addition, using coated paper that has been semi-cured by applying an adhesive such as epoxy resin to the surface as the interlayer insulating material 6, the interlayer insulating material 6 and the strip conductors 5a and 5b are bonded by heat curing treatment after winding. However, if the face treatment is omitted, use a spacer 1 coated with or impregnated with adhesive such as epoxy resin in advance.
1 and heat-curing the adhesive after winding, the spacer 11 can be sufficiently strengthened in terms of strength.

In FIG. 6, after a thread-like spacer 11 is passed through an adhesive container 13 and an adhesive 14 is applied during winding, the strip conductors 5a, 5
An example of rolling it up between b is shown.

In addition, a spacer coated with or impregnated with an adhesive and brought into a semi-cured state may also be used.

In the embodiment described above, two strip conductors are wound in parallel, but as shown in FIG. 5, three or more strip conductors 5a, 5b
, 50, etc. can be similarly applied to the case where windings are wound in parallel.

[Effects of the Invention] According to the present invention, the spacer is made of a flexible insulating material that deforms due to the tightening pressure between the winding layers, and the spacer substantially fills the gap between the parallel-wound strip conductors. Conventional spacers could not be used because the strip conductors were interposed between each other in a deformed state.
Spacers can be filled into gaps as narrow as 31111E, and as a result, the spacing between strip conductors wound in parallel can be reduced to the minimum required dimension for insulation, reducing the height of the windings. This allows for more economical design. In addition, even if there is unevenness in the spacing between the strip conductors, the unevenness can be absorbed and filled with spacers, so the mechanical strength is sufficient to prevent strip conductors from shifting due to electromagnetic force during short circuit tests. It can have strength.

[Brief explanation of the drawing]

Figure 1 is a partial sectional view showing one embodiment of the present invention, Figures 2-
FIG. 4 is a partial sectional view of another embodiment with a different form of spacer, FIG. 5 is a partial sectional view of another embodiment with a different number of parallel strip conductors, and FIG. 6 is a partial sectional view of another embodiment of the present invention. FIG. 7 is a sectional view showing an example of a transformer winding using a parallel winding; FIG. 8 is a partial sectional view showing a conventional parallel winding. .

Claims (1)

[Claims] In a strip winding formed by winding a plurality of strips in parallel with a series of interlayer insulating materials, a spacer made of a flexible insulating material that deforms due to the tightening pressure between the winding layers is placed between the strip conductors. A strip winding wire characterized in that strip conductors are interposed between strip conductors in a deformed state so that the gap is substantially filled by the spacer.