JPS6239006A - Coil conductor - Google Patents

Abstract

PURPOSE:To reduce the quantity of insulating paper used as well as to reduce the workhours for paper winding by a method wherein a tape of insulating paper is wound in a single layer on each of adjoining strands placed side to side with each other, while each tape of insulating paper is rotated in a reverse direction to each other, and the boundary line of winding is mutually shifted in the longitudinal direction of the strand. CONSTITUTION:A tape of insulating paper 2 is wound around the left side strand 1 as shown in the diagram by rotating in the direction of arrow A with the strand 1 as the center point, and the insulating paper 2 is wound and rotated in the opposite direction along the longitudinal direction of the strand at the pitch of the tape width. The taper of insulating paper 2 is also wound around the other strand 1 located on the right side as shown in the diagram in the longitudinal direction at the pitch of the ape width and by shifting the boundary line 3 of winding from the other strand 1 by one half or thereabout of the tape width while rotating the insulating paper 2 in the direction shown by the arrow B with the strand 1 as the center point. Of the boundary line 3 of winding of both strands 1 and 1, the opposing parts (a) and (b) are positioned in parallel with each other inclining in the same direction. When the strands 1 and 1 are superposed as a coil conductor, the opposing parts (a) and (b) of the boundary line of winding are not overlapped, no crossover part is generated, and a sheet of wound paper is interposed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This address relates to a coil conductor which is used in coils of transformers, reactors, etc., and is made by stacking a plurality of wires insulated with tape-like insulating paper.

[Conventional technology]

In order to reduce eddy currents, the coils of oil-immersed transformers and accelerators are generally formed by stacking a plurality of narrow rectangular conductor strands as a coil conductor to form a W4 structure. To reduce eddy current loss, the conductor is divided into multiple strands, each strand is isolated, and each strand is wrapped with paper to eliminate the influence of eddy currents generated in adjacent strands. Insulated. These insulated strands are stacked to form a coil conductor, and the whole is covered with paper-wrapped insulation to increase the insulation between turns and the mechanical strength.

Each strand of wire that makes up the coil conductor is a single conductor divided and should have the same potential. However, in reality, electromotive force is generated due to leakage magnetic flux, resulting in a slight potential difference.

Since this potential difference is proportional to the amount of leakage flux linkage, it is reduced as the conductor is subdivided. The paper-wrapped insulation of the wire acts to prevent electrical contact between adjacent wire surfaces.

The insulation of the strands of the conventional coil conductor was as shown in FIG. Each strand 1 made of a rectangular conducting wire has a strand 1
Rotate the tape-shaped insulating paper 2 in the direction of arrow A around .
Moreover, it is wrapped in paper in a single layer while being shifted by the tape width in the longitudinal direction. As a result, the tape and tape wrapping are at the boundary 3.
In this way, since the rotation direction of the 20 windings of insulating paper for both wires l is the same in the A direction, both windings are d-minutes a, which are opposite to each other in the boundary 3. b are inclined in opposite directions.

When these two paper-wrapped strands 1, 1 are used as coil conductors and overlapped as shown in FIG. 4, an intersection 4 with a border 3 is created between the windings at the upper and lower contact surfaces of the two. In order to eliminate the intersection 4 at the bottom, both bare wires l
When wrapping the paper rolls, the positions of the boundaries 3 are shifted between each other in the longitudinal direction of the strands, and when they are stacked as a coil conductor as shown in Fig. 5, the winding is performed at the opposing portions a of the boundaries 3. ,b
The intersection point 5 of is combined and occurs on the round surface side.

In order to reduce the working time for the use 1 and winding of the tape-shaped insulating paper 2, the insulating paper 2 is wound at a pitch equal to the tape width so that the ends of the tape and @ are butted so as not to overlap. However, as shown in FIGS. 4 and 5, at the intersection 4.5 of the boundary 5, there is no insulation paper between the adjacent strands 1.
There was no intervening wire, and the insulating paper 2 was thin, so there was a risk of electrical contact between the metal surfaces of the two adjacent strands.

4.5.
In order to have one or more sheets of insulating paper 2 interposed,
f When wrapping the pure loose paper 2, I wrapped it at a pitch smaller than the tape width so that it could only overlap the tape, but the contact surface of both strands 1 was completely destroyed, and there was 2 strands of paper between the strands 1. This means that more than 20 layers of insulating paper have been applied.

The insulation between adjacent strands 1 prevents electrical contact between the metal surfaces of both, and one sheet of insulating paper 2 is sufficient.

[Problems that the invention seeks to solve]

In the conventional coil conductor as described above, 20 wraps of tape-shaped insulating paper of 61 m1 are overlapped, resulting in excessive insulation, resulting in paper blisters, and an increase in the amount of insulating paper 2 used, resulting in paper wrapping. There were problems such as increased work time.

This invention was made to solve these problems, and eliminates the need for excessive winding of tape-shaped insulating paper, eliminates paper blisters, reduces the amount of insulating paper used, and reduces paper-wrapping work time. The purpose is to obtain a coil conductor with a shortened .

[Means for solving problems]

In the coil conductor according to the present invention, tape-shaped insulating paper is rotated in opposite directions to each other, and the coil conductor is wound in a single layer around adjacent strands, and the boundaries are shifted in the longitudinal direction of the strands. It is something.

[Effect]

In this invention, the boundaries between the windings of both insulating papers on the opposing surfaces of adjacent strands are parallel, eliminating intersections, and the wrapping of one strand of strands is such that the other insulating paper is located at the boundary. , O [Embodiment] FIG. 1 is a perspective view showing insulation of each strand of a coil conductor according to an embodiment of the present invention. A tape-shaped insulating paper 2 is wound around one of the strands 1 on the left side, rotating in the direction of arrow A around the strand 1!1, and abuttingly wound in the longitudinal direction at tape width pitches.

In addition, a tape-shaped insulating paper 2 is attached to the other strand 1 on the right side, rotated in the direction of arrow B with the strand 1 as the center, and arranged at a tape width pitch in the longitudinal direction, and with respect to the other strand 1 by the tape width. The winding is done by shifting the boundary by 3''f to about half.Thereby, the winding of both strands 1 is done at the opposing portion a of the boundary 3.
, b are parallel to each other with inclinations in the same direction. When these two paper-wrapped strands 1, 1 are used as coil conductors and overlapped as shown in FIG. 2, the windings will not overlap at the boundary 30 on the contact surface of both sides, but the opposing portions a and b will not overlap, and the intersection will not overlap. However, in one winding, the other insulating paper 2 is located at the boundary 3VC, and one sheet of paper is interposed.

As a result, it is not necessary to wrap the insulating paper 2 in a partially overlapping manner as in the conventional case, and sufficient insulation can be obtained by a single butt-wound winding.

Furthermore, add 20 rolls of insulating paper, slightly larger than the tape width.
The paper may be wound at a pitch, leaving a small gap at the border 3, resulting in higher savings in insulating paper and shorter paper-wrapping time.

〔Effect of the invention〕

As described above, according to the present invention, tape-shaped insulating paper is applied to both adjacent wires in a single layer without overlapping each other.
Since the windings were wound in opposite directions, and the boundaries of both windings were shifted in the longitudinal direction of the strands, there would be no matching line or intersection of the boundaries between the two windings on the contact surfaces of both strands. ,1
The presence of a sheet of insulating paper is ensured, eliminating the need for excessive wrapping of insulating paper as in the past, eliminating paper blisters, reducing the amount of insulating paper used, and shortening the paper-wrapping work time.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing paper-wrapped insulation of both strands of a coil conductor according to a major embodiment of the present invention; Figure 3 is a perspective view showing the paper-wrapped insulation of both wires of a conventional coil conductor, Figure 4 is a perspective view of a coil conductor in which both wires of Figure 3 are overlapped, and Figure 5 is the same as that of Figure 3. FIG. 2 is a perspective view of a coil conductor in which both strands are wrapped with insulating paper so that the boundaries are shifted in the longitudinal direction. 1... Element wire, 2... Tape-shaped insulating paper, 3... Winding is at the boundary. In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (3)

[Claims] (1) A tape-shaped insulating paper is wrapped around each of a plurality of strands of rectangular conducting wire, and in a coil conductor made by overlapping these strands, a tape-shaped insulating paper is wrapped around each of the adjacent strands in opposite directions. A coil conductor that is rotated and wound in a single layer, and the winding boundaries of both insulating papers are shifted from each other in the longitudinal direction of the strand. (2) The coil conductor according to claim 1, characterized in that the tape-shaped insulating paper is wound in a single butt-butt manner. (3) The coil conductor according to claim 1, wherein the tape-shaped insulating paper is wound in a single layer with a slight gap between the winding boundaries.