JPS60210818A - Winding of induction electric apparatus - Google Patents

Abstract

PURPOSE:To obtain a winding having excellent distribution of potential, small eddy current and high occupatation rate by connecting in series an interleaved winding coil consisting of a plurality of parallel conductors and a continuous disk winding coil by a composite flat angled wire. CONSTITUTION:The part A indicates a first coil having interleaved winding of parallel conductors 2a, 2b. The part B indicates a second coil having interleaved winding of a single composite flat angled wire where the flat angled copper wires obtained by covering the parallel conductors 6a, 6b with insulator are arranged and the external circumference of them is covered with the insulator 7. The part C indicates a third coil continuously disk wound using a single dislocation cable where a plurality of Formar covered copper wires are twisted and these are insulated at a time. The portions A-C are stacked in the axial direction of winding, connected in series, and the other end of part A is connected to the line terminal of winding while the other end of part C is connected to the neutral point terminal of winding. With such structure, potential distribution characteristic is improved, loss of part C is lowered and occuparation rate of part B can be improved.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a high voltage, large capacity transformer or accelerator C.
2. Jlj-hk - Concerning improvements in induction electric windings.

[Technical background of the invention and its problems]

Induction electric windings used in transformers, reactors, etc.
:In a disc winding, a coil section in which the conductor is wound from the outside to the inside and a coil section in which the conductor is wound from the inside to the outside are connected continuously and to each other by an inside transition and an outside transition. Stacked windings are generally called bicontinuous disk windings, and are the windings that require the least number of man-hours to manufacture.

However, this continuous disk winding has poor impulse voltage characteristics, and when an impulse voltage enters the line terminals, a large voltage is applied between the coil sections, especially near the line ends. Reduce this (Secondly, it is necessary to equalize the initial potential distribution determined by the series capacitance of the windings and the static capacitance between adjacent windings or with the ground, so it is necessary to make the series capacitance larger. I know that.

Therefore, conventionally, interleaved windings in which each turn of a conductor is intricately wound, and high-casing rat windings, such as windings with damping shielding in which a shield conductor is wound between conductors, have been considered. Figure 1 shows a configuration diagram of the interjeep winding. This is done by intricately winding each winding surface of the ζ isobody l as shown in the figure.
The series capacitance is increased by increasing the potential difference between adjacent turns.

Note that the numbers in the conductor 1 indicate the winding order of the conductors in two winding units.

Furthermore, in the case of large capacity (2), multiple conductors may be arranged in parallel and interleaved winding is performed. Figure 2 shows a case where there are two parallel conductors.
If ζ is also wound between parallel conductors, the potential difference corresponding to the difference in the number of turns per section can be increased between all the conductors, so the series capacitance can be further increased.

However, interleaved windings have a disadvantage in that they require a large number of man-hours to manufacture because they have a complicated structure. The number of manufacturing steps increases as the number of parallel conductors increases. Furthermore, as the capacity increases, there is a limit to the number of parallel conductors, so the cross-sectional area of each rectangular copper wire must be increased, which in turn leads to an increase in eddy current loss.

In order to reduce manufacturing man-hours, a winding wire having a configuration as shown in FIG. 3 has conventionally been considered. That is, the coil portion (A) near the line end 4, where the potential gradient is highest when the impulse voltage enters, has an interleaved winding configuration, and the following (coil portion LB) has a continuous disk winding configuration. be. This makes it possible to reduce the number of man-hours required to manufacture the entire winding.

In addition, in order to reduce eddy current loss especially in the case of a large capacity winding, as shown in FIG. 4, in the configuration of FIG. It is considered that a coil is wound using a transposed cable 3 which is made by twisting rectangular copper wires with a cross-sectional area. The cross-sectional area of the transposition cable 3 is shown in Figure 85. Eddy current loss is proportional to the square of the dimension of the rectangular copper wire 4 in a plane perpendicular to the direction of magnetic flux. By using the transposed cable 3, the thickness of the copper wire, which is the plane perpendicular to the axial direction, which is the upper component of the magnetic flux in the winding, can be made L/2 to l/3 that of a general rectangular copper wire. Current loss can be reduced to a few minutes.

Furthermore, the magnetic flux within the winding is distributed in such a way that it spreads from the center of the inner and outer windings at the upper and lower ends of the winding due to a phenomenon called fringing, and the radial component becomes large. Therefore, if the line end is placed at the center c#t of the winding, and the winding is wound vertically in parallel (two windings with the upper and lower ends of the winding as the neutral point ends, that is, vertical distribution 1: winding, Since the coil parts using the transposed cable 3 are arranged at the upper and lower ends of the winding, the width of the rectangular copper wire is also approximately 1/2. The eddy current loss due to these components is also about 1/4 compared to ordinary rectangular copper wire.

However, when an impulse voltage enters the line end in the winding configuration shown in FIG. 3 or 4, the initial potential distribution to ground when the entire winding is constructed of interleaved windings becomes 61i! 3, the initial potential distribution to the ground of this winding becomes like curve B, and although the potential gradient of the interleaved winding part (A) near the line end is kept low, Interleaved winding part (A)
There was a drawback that the potential gradient at the connection point P between the continuous disk winding section (B) and the continuous disk winding section (B) which was close to the point P became high.

This results in interleaved windings with large series capacitance,
This occurs as a result of the discontinuity in the series capacitance becoming too large at the connection point P, since continuous disk windings having a series capacitance only as large as l/lo of the interleaved winding are directly connected. Therefore, a winding unit having a series capacitance value intermediate between the two is interposed between the two, and the series capacitance of the winding unit is gradually decreased as the line progresses from the line end to the neutral point. If this is possible, the initial potential distribution of the winding will become clearer, and the above-mentioned drawbacks will be improved.

Therefore, when constructing an interleaved winding using parallel double conductors, a winding having a configuration as shown in FIG. 7 is considered. This is followed by a first coil section (mu) in which parallel conductors 2"+2b are interleaved and wound, followed by 2m parallel conductors.
, 2b is not interleaved, the second coil part (B) is interleaved, and further (=, the third coil part (C) of continuous disk winding using the transposed cable 3 is placed in the second coil part (B). The coil portions (B) and C are arranged vertically.

According to this configuration C2, the second coil portion (B) (in the second case, the parallel conductor 2a).

2b, no potential difference is applied between them, and the difference in the number of turns per section (the point where a potential difference corresponding to 2
172 of the coil portion (A), and the series capacitance is also approximately 1/2. Therefore, the first capacitor with large series capacitance
A second coil portion CB) having a series capacitance intermediate between the two coil portions (CB) is arranged between the coil portion (A) and the third coil portion (C) having a small series capacitance. The initial potential distribution of the winding is as shown by curve C in the 1m6 diagram (thus, the potential distribution characteristics are improved.

-1. When a plurality of rectangular copper wires 4 are arranged in parallel and wound together, there is no major potential difference between the parallel conductors, so the insulation between them may be thin. Therefore, Fig. 8 ζ22
As shown in the example of conductors (2, each insulation cable < 5 m
, 5b is proposed in Japanese Patent Laid-Open No. 56-58214 to use a composite rectangular wire with a structure in which two conductors 6 m + 6 b are lined up and an insulating layer 7 is applied to their outer peripheries. has been done. The advantage of composite rectangular wire is that it reduces insulation in unnecessary parts and improves the space factor of the winding (:
be.

[Purpose of the invention]

An object of the present invention is to obtain an induction electric appliance winding having good potential distribution characteristics, low loss, and high space factor.

[Summary of the invention]

In order to achieve the above object, the present invention employs at least two rectangular copper wires in parallel (or interleaved winding), with a potential difference between the conductors equivalent to the difference in the number of turns per section. The first coil part has an intricately interleaved winding configuration, and the number of parallel conductors in the first coil part is the same as the number of parallel conductors C: Insulated rectangular copper wires are arranged side by side. A second coil part has an interleaved winding structure using a single composite rectangular wire whose outer periphery is insulated all at once, and the total cross-sectional area is approximately the same as the total cross-sectional area of the parallel isometric body of the first coil part. A large number of equal formal rectangular copper wires are twisted together, and the third coil part is made into a continuous disk-wound structure using a transposed cable insulated all together, stacked in the axial direction C = and connected in series. However, it is characterized in that the first coil portion is arranged on the line end side and the third coil portion C on the neutral point side.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on FIG. 12.

In Figure 149, the human part is made up of two parallel conductors 2”
The first coil part is interleaved winding of A2B, and part B is two parallel conductors 5 m long.

6b, line up rectangular copper wires each with an insulation layer, and apply insulation layer 7 around their outer circumferences m1.
This is the second coil part which is interleaved wound with a composite rectangular wire, and the part C is made by twisting a large number of formal rectangular copper wires 4 and insulating them all together. This is the third coil portion that was continuously wound into a disk using a coil (as shown in Fig. 5). At this time, the conductor dimensions are selected so that the total cross sections rkJN of the parallel isobodies of the first, second, and third coil portions, (B), and (Q) are approximately equal. .Third coil part (5), (Bl, (Q is stacked in the direction of the winding axis and connected in series, the other end of the *1 coil part is connected to the line terminal of the winding) The other end of part (q) is connected to the neutral terminal of the winding.

By configuring the C: winding like this, the second coil part has the same series capacitance as the second coil part (Bl) in the example of FIG. 7, and as described in the example of FIG. 7 (: The potential distribution characteristics are improved. Also, by using the transposed cable, the loss of the third coil portion (Q) is reduced.
Compared to example C2 in the figure, the space factor of the second coil molecule B) is improved, contributing to the compactness of the entire winding.

As another embodiment of the present invention, as shown in FIG. 10, 9B! ! , l in the example of the third coil part (q is the l-th
Coil part (four rectangular copper wires ga, gb, gc, gdζ consisting of twice the number of N parallel conductors 2a * 26)
Two insulated fibers < 9al19b19c19d are applied to each of them, and these are double-layered in two stages in the axial direction, two wires are lined up in the radial direction, and the outer periphery of these wires is continuous using one composite rectangular wire with insulation 10 applied. It may also be rolled into a disc.

This configuration also has the same effect as the example of FIG. 9. In particular, when the line end is wound vertically using the center C device of the winding, reducing the axial dimension of the conductor at the end of the winding is effective in reducing eddy current loss, as explained in Part 2. Therefore, this configuration has an effect of reducing loss to the same extent as the example shown in FIG.

The explanation so far has shown the case where the first coil is wound with two parallel conductors, but even if there are three or more parallel conductors, a winding with a similar configuration can be obtained and the same effect can be obtained. Needless to say.

〔Effect of the invention〕

As explained above, this invention consists of an interleaved coil made of a plurality of parallel conductors, an interleaved coil made of one composite rectangular wire, and one transposed cable or one axially two-stage ( By connecting m rows of continuous disk-wound coils made of bisected composite rectangular wires, it is possible to obtain an induction coil with excellent potential distribution, low eddy current loss, and high space factor.

[Brief explanation of the drawing]

Figures 1 to 4 and Figure 7 are winding configuration diagrams showing the winding arrangement of conventional induction electric device windings, and Figure 5 is the second diagram of Figure 4.
Coil part (B) (- Cross-sectional view of the conductor used, Figure 6 is a characteristic diagram showing the initial potential distribution to ground of the winding of Figure 1, Figure 3 or Figure 4, and Figure 7. Figure 8 9 is a sectional view of a conductor used in the second coil portion of FIG. 9, FIG. 9 is a winding configuration diagram showing the winding arrangement of an induction electric device winding according to an embodiment of the present invention, and FIG. It is a sectional view showing another example of the conductor used in the third coil portion C2 in the figure. Coil part l...Conductor 2a, ib...Parallel equal body 3...Transposition cable 4...Flat copper wire 5j1.5b, 7...Insulation cable 5m, 5b...Conductor (7317) Agent: Patent attorney Kensuke Chika (and 1 others)
Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 10 Figure 7

Claims (1)

[Claims] (1) At least two rectangular copper wires are wound in parallel (in parallel and interleaved), and wound in a convoluted manner to give a potential difference between all conductors that is approximately equivalent to the difference in the number of turns per l section. The first coil part with the interleaved winding configuration and the same number of parallel conductors in the first coil part are lined up with insulated rectangular copper wires, and their outer peripheries are collectively insulated m1 A second coil part that has an interleaved winding configuration using a composite flat wire, and a large number of formal flat copper wires whose total cross-sectional area is approximately equal to the total cross-sectional area of the parallel conductor of the second coil part. are twisted together, and the third coil part is made into a continuous disc winding structure using a transposed cable insulated all together.The third coil part is stacked in the axial direction and connected in series, and the third coil part is placed on the line end side. The third coil part and the induction electric winding placed on the neutral point side. 121 The third coil part consists of twice the number of parallel parallel coils of the first coil part (two insulated coils). A continuous disc-wound structure is created by arranging the processed flat rectangular copper wires in two stages in the axial direction and arranging at least two or more in the radial direction, and insulating the outer periphery of these as a single composite rectangular wire. An induction electric appliance winding according to claim 1.