JPS6224927B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inductor winding with improved series capacitance.

Among induction electric device windings used in transformers, reactors, etc., especially disc windings, 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 sequentially arranged inside. Windings that are continuously and alternately connected and piled up by crossovers and outer transitions are generally called continuous disk windings, and are the windings that require the least number of man-hours to manufacture. However, this 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. To make this smaller,
It is known that it is necessary to equalize the initial potential distribution determined by the series capacitance of the windings and the capacitance between adjacent windings or with the ground, and that it is sufficient to increase the series capacitance.

Therefore, conventionally, high series capacitance windings have been considered, such as interleaved windings in which each turn of a conductor is intricately wound, and windings with damping or shielding in which a shield conductor is wound between conductors. FIG. 1 shows a configuration diagram of an interleaved winding. As shown in the figure, each turn of the conductor is intricately wound to increase the potential difference between adjacent turns, thereby increasing the series capacitance.

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

However, this winding has a disadvantage in that it requires a large number of manufacturing steps because of its complicated structure. Therefore, conventionally, as shown in Figure 2, several winding units near the line end, where the potential gradient is highest when the impulse voltage enters, are
The number of manufacturing steps for the entire winding is reduced by using an interleaved winding configuration for A ₁ to Am and a continuous disk winding configuration for the subsequent winding units B ₁ to Bn. Here, U is the line terminal, and U is the neutral terminal.
P indicates the connection point between the interleaved winding and the continuous disk winding, respectively.

However, when an impulse voltage enters the line end of this winding, the initial potential distribution to ground when the entire winding is composed of interleaved windings becomes as shown by curve A in Fig. 3. The initial potential distribution to ground of this winding is as shown by curve B, and although the potential gradient in the interleaved winding part near the line end is suppressed low, The drawback was that the potential gradient in the plate winding part became high.

This occurs because a continuous disk winding with a small series capacitance is directly connected to an interleaved winding with a large series capacitance, resulting in too large a discontinuity in the series capacitance at the connection point. 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 sequentially decreased as the winding progresses from the line end to the neutral point. If possible, the initial potential distribution of the winding will be smooth,
The above drawbacks are improved.

This invention was made in view of the above points,
To form a winding unit having a series capacitance intermediate between an interleaved winding and a continuous disc winding, thereby reducing the man-hours for manufacturing the entire winding, and obtaining an induction electric winding having good characteristics against impulse voltage. It is an object.

An embodiment of the present invention will be described below based on the drawings. In Figure 4, the winding unit A near the line end is composed of interleaved windings in which each turn of the coil conductor is intricately wound, and the winding unit B near the neutral point is composed of continuous disc windings. ing. One or more winding units C ₁ and C ₂ are connected between the winding unit A and the winding unit B. Winding unit C ₁ is formed by winding one conductor a twice from the outside to the inside to form turns 1 and 2, and then adding conductor b to combine the two conductors a and b. Then, the first coil section is further wound three times from the outside to the inside. During this time, conductor a is connected to turns 3, 4, and 5.
, and conductor b forms turns 9, 10, and 11. The two conductors a and b then cross over to the second coil section on the inside, and move from the inside to the outside for 3
The conductor a is then cut and connected to the beginning of the winding of the conductor b of the first coil section. During this time, the conductor a forms turns 6, 7, and 8, and the conductor b forms turns 12, 13, and 14, and the connection between conductor a and conductor b becomes a transition from turn 8 to turn 9. After that, conductor b is further wound twice from the inside to the outside to form turns 15 and 16, and a second
constitutes a coil section.

If the winding unit C ₁ is configured in this manner, the inner portion from the transition from turn 8 to turn 9 will have a configuration similar to that of an interleaved winding, and the outer portion will have a similar configuration to a continuous disk winding. As can be seen from the figure, the potential difference between adjacent conductors in the inner part of the transition from turn 8 to turn 9 is smaller than in the case of a normal interleaved winding configuration, and the potential difference between adjacent conductors is larger than that in one turn. , the electrostatic energy stored in this winding unit becomes smaller, and as a result, the equivalent series capacitance of the winding unit as a whole becomes smaller than that of interleaved windings. However, it is clear that the series capacitance is larger than that of the continuous disk winding, and therefore a winding unit having a series capacitance intermediate between the two is obtained.

In addition, in the winding unit C ₂ , the number of turns of one conductor is increased compared to the case of the winding unit C ₁ , and the number of turns of two conductors is reduced, so that the transition from turn 8 to turn 9 is
By moving it closer to the inside than in the case of C ₁ , the part that has the same configuration as interleaved winding is reduced,
The series capacitance is even smaller than that of _C1 .

In such winding units C ₁ and C ₂ , the series capacitance value can be adjusted by changing the ratio of the number of turns of one conductor to the number of turns of two conductors in one section. Winding units with suitable values between interleaved winding and continuous disk winding can be obtained, and these are divided into winding unit A of interleaved winding configuration and continuous disk winding as shown in Fig. 4. Winding unit B of configuration
If the winding is arranged so that the series capacitance decreases sequentially between
A winding wire with excellent impulse voltage characteristics can be obtained.
Further, since this winding does not need to have an interleaved winding configuration as a whole, the number of manufacturing steps can be reduced.

FIG. 5 shows another embodiment of this invention,
This figure shows the case where the winding is composed of two parallel conductors. Conventionally, winding unit A ₁ , in which two parallel conductors are divided into interleaved winding configurations, is followed by winding unit A ₂ , in which two parallel conductors are collectively formed into interleaved winding configurations. It has been carried out since. FIG. 5 shows a structure in which a winding unit A ₂ and a winding unit _B constructed in the same manner as described in FIG. This is an arrangement of winding units C ₁ and C ₂ with intermediate series capacitance. In this case, of course, the winding unit is A ₂
The discontinuity in the series capacitance of the winding unit B is alleviated, and a winding having a smooth initial potential distribution to ground is obtained.

FIG. 6 shows still another embodiment of the present invention, in which the winding is constituted by two parallel conductors. Between the winding unit A ₁ , which has an interleaved winding configuration by dividing two parallel conductors, and the winding unit B, which has a continuous disc winding configuration, there is a winding constructed in the same manner as described in Fig. 4. Winding units C ₁ and C ₂ having a series capacitance between unit A ₁ and winding unit B are arranged. However, in this example, unlike the example shown in Fig. 5, in the winding units C ₁ and C ₂ , the inner part of the winding has the same structure as the interleaved winding, and the outer part has the same structure as the continuous disk winding. , the two parallel conductors are divided and wound interleaved between the conductors of other winding orders in a part having a configuration similar to that of an interleaved winding.

With this configuration, the discontinuity in the series capacitance between winding unit A ₁ and winding unit B is alleviated,
A winding with a smooth initial potential distribution to ground is obtained.

Note that even when there are three or more parallel conductors, the inner part of the winding has the same structure as the interleaved winding, and the outer part has the same structure as the continuous disk winding. It goes without saying that winding units with intermediate series capacitances can be obtained. Furthermore, in this case, the winding unit shown in Fig. 5 is the same as the interleaved winding.
The parallel conductors may be wound all at once as in the example of C ₁ and C ₂ , or the parallel conductors may be divided and wound as in the example of winding units C ₁ and C ₂ in FIG.

As explained above, the present invention makes it possible to obtain a winding unit having a series capacitance intermediate between an interleaved winding configuration and a continuous disk winding configuration, and to construct a winding unit by combining a plurality of these. By connecting this between a winding unit with an interleaved winding configuration and a winding unit with a continuous disc winding configuration, it is possible to obtain an induction electric device winding that has excellent impulse voltage characteristics and reduces manufacturing man-hours. can.

[Brief explanation of the drawing]

Figures 1 and 2 are configuration diagrams showing the winding arrangement of conventional induction electric device windings, Figure 3 is a diagram showing the initial potential distribution to ground of the windings in Figures 1 and 2, and Figure 4 is FIGS. 5 and 6 are block diagrams showing a winding arrangement of an induction electric device winding according to one embodiment of the present invention, and FIGS. 5 and 6 are block diagrams showing other embodiments of the present invention, respectively. A, A ₁ , A ₂ ...interleaved winding unit, B...
Winding units of continuous disk winding configuration, C ₁ , C _{2 .} . . Winding units having intermediate series capacitance between interleaved winding and continuous disk winding, a, b . . . conductors.

Claims (1)

[Claims] 1. An interleaved winding is used as a winding unit near the line end, in which the conductor is wound in a complicated manner, and a coil section is used in which the conductor is wound from the outside to the inside as a winding unit near the neutral point end, and from the inside to the outside. In an induction electric winding using continuous disc windings stacked by sequentially connecting and stacking wound coil sections sequentially by inner crossing and outer crossing, the interleaved winding and the continuous disc winding are Induction electric appliance windings are made by connecting winding units in which the outer circumferential side of the winding is made up of continuous disk windings and the inner circumferential side is made up of interleaved windings.