JPS59121908A - Continuous disk winding - Google Patents

Abstract

PURPOSE:To contrive to equalize shunt currents at a continuous disk winding by a method wherein the positions in the radial direction of conductors of two groups constructed by making the adjoining parallel conductors of two pieces out of the parallel conductors of four pieces are replaced mutually at least at one place between the sections to construct a transition between the sections, and transitions of every conductor of the parallel conductors of four pieces are constructed between the sections other than the above-mentioned section. CONSTITUTION:At a new transition 14, out of conductors a-d of four pieces in a composite flat type wire, the adjoining conductors of two pieces (a) and (b), (c) and (d) are made as the conductors of one group respectively, replacement of the positions in the radial direction is performed between the conductors of two groups thereof, and replacement of the positions in the radial direction is not performed between the conductors of one group thereof, namely, between the conductor (a) and the conductor (b), the conductor (c) and the conductor (d). Moreover, at the usual transitions 13, 15, replacement of the positions in the radial direction of the parallel conductors a-d is performed between the sections. Thereupon, the positions to be occupied by the respective conductors in the radial direction of the winding are equalized in the whole of the winding, transposition is attained completely, and a compact transformer of low loss and having a small cooler, etc., can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a continuous disk winding, and more particularly to a transposed structure of a continuous disk winding often used in core type transformer windings.

[Technical background of the invention and its problems]

The winding used in a core transformer has a voltage of the winding,
Various winding methods are selected and applied depending on the current, but among them, continuous disk winding is easy to work with due to its simple structure.
Due to its excellent electrical and mechanical properties, it is widely used as a winding wire for a wide range of voltage classes. As a conductor for such a continuous disk winding, one or more rectangular conductors (conductors with a rectangular cross section) are used in parallel depending on the required current capacity. Furthermore, for windings with large currents, one or more transposed wires made by twisting a plurality of rectangular conductors are used in parallel. Furthermore, in order to improve the conductor space factor within the winding, as shown in FIG. (This is called a composite rectangular wire). FIG. 2 shows the conductor arrangement of a conventional continuous disk winding using a composite rectangular wire formed of two conductors. In the figure, 1 is a disk winding, 2 is a section of the winding, and 3 is another winding facing the disk winding 1 wound around the core leg 4. FIG. 3 is an enlarged sectional view of part A of the disc winding 1 shown in FIG. 2, and the numbers 1.2, . . .
... is the winding number, and alb is the parallel 2 of the composite flat angle Katsuyama.
The conductor of the book is shown. By the way, the part between sections of the winding where the winding moves to the next section is called a transition. FIG. 4 is a perspective view of a typical outer transition between sections of winding. In the figure, the winding 10 is wound through an insulating spacer 9 placed on the outside of the cylindrical insulator 8, and the portion where the winding 10 moves to the next section, that is, the transition 11, is the winding It is formed at the outer end of the wire 10. When there are two parallel conductors in a composite rectangular wire, the radial positions of the two parallel conductors are swapped at one transition point in the center of the winding, that is, they are transposed, so that the conductors face each other. This makes it possible to equalize the relative distances between each conductor and the windings facing each other, thereby making it possible to equalize the mutual inductance between each conductor and the opposing windings, and to equalize the shunting of parallel conductors.

However, the conventional continuous disc winding configuration described above has the following drawbacks. That is, when there are two parallel conductors of the composite rectangular wire, the central part 1 of the winding as described above
By exchanging the radial positions of the conductors at these points, the conductor transposition for the opposing winding is completed, but when the number of parallel conductors in the composite rectangular wire increases to four, the transposition between the parallel conductors is incomplete. 9. An unbalance occurs in the shunt flow between the five parallel blocks, which increases the winding load loss and eventually increases the winding temperature.

This will be explained below.

Figure 5 shows four parallel conductors in a composite rectangular wire, section per p.
This figure shows the arrangement of each conductor in a section of a conventional winding wire when the number of turns is three. In the same figure, P
is the start of winding, Q is the end of winding, jl), a, b,
c and d illuminate the four parallel conductors in the composite rectangular wire. Each of the four parallel bodies performs a transfer 12 such that its radial position is exchanged between sections of 174.2/4.3/4 windings, and the mutual positions with respect to the opposing winding (not shown) are seemingly equal. However, there are actually the following problems. That is, since conductors a and conductor d or conductor C and conductor C occupy symmetrical positions in each section, the dislocation between them is perfect, but conductor C is always similar to conductor a.
and conductor d.

The fact that conductor C always occupies the middle of the conductors suggests that the arrangement of each conductor is averaged, and in fact the total length of each conductor is approximately the same (that is, the resistance is the same), but the opposite winding (not shown) There is a non-negligible difference in the mutual inductance for the lines. The shunt of each conductor is determined by the impedance between each conductor and the opposing winding, so even if there is a slight difference in mutual inductance, as long as the resistance is the same, there may not be much unbalance in the shunt. In particular, the larger the capacity of the transformer, the thicker the core, the smaller the number of turns, and the smaller the ratio of resistance to inductance, resulting in extreme imbalance.

This shunt imbalance increases load loss and increases winding temperature, deteriorating transformer characteristics, and in extreme cases can cause winding burnout, so it must be avoided at all costs.

[Purpose of the invention]

The present invention has been made in view of the above points, and its purpose is to provide an improved continuous disc winding so that the shunt current is equal even when there are four parallel conductors in a composite rectangular wire. be.

[Summary of the invention]

In order to achieve the above object, the present invention provides a continuous disk winding in which a composite rectangular wire consisting of four parallel conductors is continuously wound, between at least one section of the disk winding. Among the four parallel conductors, two adjacent parallel conductors constitute one set, and the two sets of conductors are exchanged in the radial position R to be used as a bridge between the sections. Between the sections other than the cross section, each conductor of the four parallel conductors has a width p, so that the radial positions of the conductors in each of the nine board rows are symmetrically exchanged.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 6 shows the arrangement of each conductor in the continuous disk winding according to the present invention, where P is the beginning of the winding, Q is the end of the winding, and ! l)
, a, b, C, and d represent four parallel conductors in the composite rectangular wire. The figure shows an example in which there are four parallel conductors in a composite rectangular wire and the number of windings in the section drawing is three times9, and each parallel conductor is 1/4.2/4.3 of the total length of the winding. The cross section υ13,14,15 is carried out between the sections of
913.15 is a new transition, and 913.15 is a conventional transition between sections corresponding to 1/4 and 3/4 of the total length of the winding. As shown in the figure, the new crossing wire 14 is constructed by connecting two of the four conductors aXb, c, and d in the composite rectangular wire to each other.
The book conductors a and c(!:d are each set of conductors, and the positions in the radial direction are exchanged between these two sets of conductors, that is, conductor a and conductor b1 conductor C The positions in the radial direction are not interchanged between the conductor 6 and the conductor 6.

Further, the conventional transitions 13.15 are for exchanging the radial positions of the parallel conductors a% b% "1 d between the sections.

As explained above, the continuous disk winding according to the present invention has a new cross section between sections corresponding to the center of the entire length of the winding. 1
114 was adopted, the conductor C, which had been located in the middle of the composite rectangular wire, was moved to the end of the composite rectangular wire after the transfer, and conversely, the conductor C, which was located at the end of the composite rectangular wire, After crossing, conductor a and conductor d will be located in the middle of the composite rectangular wire.

By performing this kind of new crossing 9 in the medium-heated part of the entire length of the winding core, the position that each conductor occupies in the radial direction of the winding is equal throughout the winding, and the transposition is completely performed. In the above embodiment, the new transition is limited to the center of the entire length of the winding, but it is sufficient to make the new transition approximately at the center of the total length of the winding. However, it is very popular to place a new crossing point only in the center of the entire length of the winding, and it is necessary to make the new crossing several times, so that each conductor in the composite rectangular wire is located in the middle of the winding as a whole. It goes without saying that the configuration may be such that the sections occupied are approximately half each.

〔Effect of the invention〕

According to the present invention, it is possible to obtain a continuous disk winding in which even if there are four parallel conductors in a composite rectangular wire, the branching currents of the Tani-Sakai body are equal. As a result, it is possible to obtain a compact transformer with low loss and a small cooling device.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional composite rectangular wire, and FIG. 2 is a cross-sectional perspective view of a continuous disc winding made of the composite rectangular wire of FIG. 1.
Fig. 3 is an enlarged cross-sectional view of part A in Fig. 2, Fig. 4 is a perspective view of the outer bridge in Fig. 3, and Fig. 5 is a continuous disc winding made of another conventional composite rectangular wire. Conductor Layout Diagram: FIG. 6 is a conductor layout diagram of a continuous disk winding which is one embodiment fO of the present invention. 1... Continuous disk winding, 2... Section of winding. 3. Opposed winding, 4. Core leg, 5. Flat conductor, 6.
．． 7... Insulator, 8... Cylindrical insulator, 9... Insulating spacer, 10... Winding wire, 11.12.13.14.15
... Watari 0 (8733) Agent Patent Attorney Yoshiaki Inomata ()'! , 75-143

Claims (1)

[Scope of Claims] (In a continuous disk winding formed by continuously winding a composite rectangular wire consisting of four parallel conductors, the four conductors are connected between at least one section of the disk winding. Among the parallel conductors, two sets of conductors, each consisting of two adjacent parallel conductors, are swapped in their radial positions to form a bridge 9 between the sections, and a section other than the bridge 9 between the sections. Between each conductor of the four parallel conductors?&l)
A continuous disc winding wire characterized by: (2) The continuous disk winding according to claim 1, wherein at least one section of the disk winding is a section at a substantially central portion of the disk winding.