JPS5878405A - Coil for electrical apparatus - Google Patents

Abstract

PURPOSE:To improve an initial voltage distribution and workability, and to obtain high quality, highly reliable coil for electric apparatus by forming a coil with four sections considered as a unit through connection between the first and fourth sections to a high cell cap coil for which two sections have been considered as a unit. CONSTITUTION:In the case of this coil, the conductors 1-16 and conductors 17-32 are wound in parallel forming a continuous plate coil of 2-column and 1- row. When the four sections are shunted, the one conductor 16 of the fourth section is cut and is connected to the conductor 17 of the first section at the point A'. In the same way, a coil is formed by repeating such process until the desired number of turns is obtained with the four sections of continuous plate coil of 2-column and 1-row considered as a unit. Therefore, a number of turns of one section is doubled, a number of all sections is reduced to 1/2, a series static capacitance is increased up to 4 times. As a result, the initial voltage distribution comes closer to a steady voltage distribution. Insulation between sections is alleviated by about 7% than that of the conventional high cell cap coil.

Description

[Detailed Description of the Invention] 1) Technique of the Invention Publicly Funded The present invention is for electrical equipment with high series capacitance = D, 41, for electrical equipment with further increase in series capacitance. Regarding coils, 2) Next technology transformers, etc.O': Extremely steep progression of wave crest in 1 line #I
When L is applied, the potential distribution within the coil at the initial stage of voltage application is determined by the series distributed capacitance and the distributed capacitance between the coil and the ground. ζ0 initial potential distribution, steady potential distribution determined by coil inductance, and t) @ to @
Therefore, transient potential oscillations occur within the coil. :The local insulation within one coil and the insulation between the coil and the ground are largely controlled by this potential oscillation.Therefore, in order to rationalize the insulation of the fill, it is necessary to minimize the line potential oscillation. The ninth step is to bring the initial potential distribution close to the steady-state potential distribution.

Now, when a rectangular liquid with a voltage V is applied to the coil as shown in ill.9, the initial potential Vx at point O of the coil grounding end ν is expressed by equation (1).

However, t: total coil length, C! Σ・,K! It can be seen that the relationship between V sumi/V and X, where α is an I darameter in Σ, is 1 kD as shown in the 2110th line, and the initial potential distribution approaches the steady potential distribution when α is small. In order to reduce α to 1, it is necessary to increase the series capacitance or to decrease the ground capacitance C. Focusing on this point, the HiCell Cap Coil is a coil designed to greatly reduce the series capacitance.

The basic configuration of the high cell medium coil is shown in Figure 3.As shown in Figure 311, conductors 1 to 80 and conductors 9 to 16 (
The numbers indicate the conductors in each turn) are arranged in parallel and interleaved with each other. To explain the winding process of the Hi-Cell Cap Coil, 1. First, there are two conductors (
A configuration of 211 coils is possible, but in the following, we will use o Cut the O conductor and connect the 8th and 90th conductors at the M point using a sexy connector. In the same manner, this is repeated until the desired turn is reached, continuing at points B, C, D''e*, and constructed as in No. 311.

3) According to the prior art 110 problem HiO configuration, at least one connection is required for every 42 conductors, and if a plurality of conductors are used, the number of connection points is multiplied by the number of parallel conductors. To increase. Compared to continuous disc coils that are not interleaved, the amount of coil winding work is greatly increased, and in terms of quality, there is also a lot of connection work1.
, there is a problem that the reliability of the product decreases and the product becomes unusable.

Next, I will explain how to calculate the series capacitance section of the 11f coil.First, let's take a 2-sex coil as a unit of 0 and find the capacitance between M and B, for example. (
Assuming that the total number of sexes/2) are connected in series, K can be found. The electrostatic capacitance X' between turns is considered to be distributed like a 4I type capacitor between conductors 1 to 8 and conductors 9 to 160 in response to a steep surge of wave 11, so (2 ) Expression is difficult.

−−−−−−−−−−−(2) jj, −: dielectric constant of strand insulator O, r: @ IIa
O average half-work, b: Width of wire, t: Thickness on both sides of bare insulation 1,
n: Number of turns of the sexy seal.

Therefore, the total series capacitance section is
Assuming that 2) are connected, where N is the total number of sexy connections ζζ, @gtabg% is the Hiro constant for one O coil, so K is approximately proportional to (m/N). It turns out.

Incidentally, continuous circle @ y 4 k O (1 is 20 to 2sli
jI! In TeToj+, ^I7 Le Cap Ile, this is 2.5 to 3. Although it has been improved to SII degrees, it is still an unsatisfactory value.

4) Purpose of the Invention The present invention aims to reduce the average wire width of conventional coils and windings by 117%.
Thickness on both sides of 1 piece of insulation t1 Number of turns n1
By increasing the series capacitance compared to the conventional high cell capacitor VF quill while keeping the total number of sexes N exactly the same, α can be greatly reduced, and the initial potential distribution can be greatly improved. The purpose is to improve the ** and provide high quality, highly reliable coils for electrical equipment.

5) Structure of the Invention In order to achieve the purpose of ζOIi, the 9II line of the present invention has been changed to a high cell cap, which had previously been 2-sexy.
By connecting between the 4th and 7th wires of the coil kfC, a coil can be constructed with 4 sets of wires as one unit 6) Example @O Example below , the invention will be explained with reference to the embodiments shown in the figures.

Figure 4 shows the basic structure of the coil according to the present invention, and the winding method of this coil is 1 to 16 conductors and 17 to 320 conductors.
Conductor (parallel K11l to make two stages and one row of continuous plate-like coils), wind this into 4-circle winding IN, cut one conductor 16 of 4th winder at 9 and ζ-ro, It is connected to the conductor 17 of the first conductor at point M'. Similarly, 2 rows 1 row O
The coil shown in the figure is constructed by repeating the continuous plate-shaped coil in units of 4 squares to form a desired turn.

According to the original @; Rounding considering the capacitance of Il, 5th Il
Hold up l. No. 51I is drawn with the even-numbered sections of No. 411 lined up with the odd-numbered sections II, and is equivalent to FIG. 4 with respect to the zero distribution of series capacitance. Comparing Figure 3 and Figure 5, the number of turns in 17rishimanyu) is doubled as KID food sexy number 1/2 K becomes 11: Therefore, the above formula (3) ) The series capacitance increases by about 4 times, and α becomes 1/2 Kt.
It can be seen that the initial potential distribution approaches the steady potential distribution.

Next, let's consider the insulation of the fill using the present invention.

For plate-shaped coils, the main considerations are insulation between turns, insulation between windshields, and ground insulation. So, first, think about it between turns. In the steady state part, the third! [If you compare the 4th garden with
) In contrast to OK, where a voltage of 211 @ is applied, assuming the electromotive voltage of 0, a voltage of 4 m @ 0, which is twice that, is applied in Fig. 4. However, although this is sufficiently low compared to the shared voltage caused by the initial potential distribution, which will be described later, it does not pose a problem for OfAnS*. Due to the initial position distribution for -ji, the charge occurs during the first turn of the first set-up, and its magnitude is expressed by the equation (4).

(4) 2. A typical value for the conventional high dragon le cap f pool is 111111130. %wtm@Q, α
By substituting +++x3, on the other hand, in the coil based on the original WIAK, α#1. *=60 in s. Since it is equal to N-30, (6) and (6), comparing (6) and (5), it increases by only 131, at most 1G-.

Next, consider the insulation of the sector seal. As can be seen in FIGS. 3 and 4, the highest voltage is generated inside the coils of the second sex and the 1s3 sex in the conventional HiCell F:I coil, and in the coil according to the present invention, the highest voltage is generated inside the coil in the fourth sex. The highest voltage is generated between sex 1 and the 5th sex. This value line, the conventional high cell middle guy f: 1 il O
The case is expressed by equation (8), and the coil according to the present invention is expressed by equation (9).

Same as above 1 (substituting N+am180 G, 1103 G into both equations, we get ・・・-・・・・・・・・・・・・(2), and comparing the ring and the shaft, we get: 14) According to Phil, Inc., 7-@ change conventional Heiserukyaf-: 1 Illustrated between 1 and 1 F O candy edges will be reduced.

The above shows that the coil according to the present invention is almost equivalent to the conventional high cell cap coil in terms of insulation between turns and between the iron core. We will consider ground insulation, which governs the dimensions between the fill and tank of an oil-immersed transformer of 11KTh, and which has the greatest effect on the overall size of the equipment.

Regarding ground insulation, the so-called ungrounded in-d pulse test in which an in/1 pulse waveform is applied from both ends of the coil is the most severe in terms of conditions. If it is a human connection, the potential at the neutral point (as well as the applied voltage) will take a high maximum value due to potential oscillation.

In the coil according to the present invention 1, the above-mentioned potential vibration is suppressed, so by reducing the ground insulation, the distance between the tank and the coil can be reduced.
Tap switching IIO contributes to the miniaturization and weight reduction of electric equipment, such as reducing the need for ground insulation.On the other hand, during coil winding, the cutting and connecting work of the conductor is halved, and the number of machining steps is greatly reduced. It is also very effective in reducing the amount of damage and improving reliability**. ・Modified example of the D invention. This is what I did. Even if this is done, the main @0 effect will not be impaired in any way.The explanation in the main text is based on one conductor with one turn and one conductor. Needless to say, it has the same effect as this.

8) According to the present invention, the effect of the release is more than that of the conventional high cell medium!
The electric potential oscillation characteristics of the coil are improved, the insulation between sectors 1 and ground insulation is reduced, and the workability is improved and reliability is improved, contributing to the miniaturization of the entire device. A coil for equipment can be obtained.

[Brief explanation of drawings]

Fig. 1 is a rounded equivalent circuit diagram explaining potential oscillations, Fig. 2 is a graph showing the potential distribution at No. 11IIK with α as a d parameter, and Fig. 3 is a cross section showing the turn configuration of a conventional high cell cap coil. Figure 4 is a sectional view showing one embodiment of the present invention, 5th solid state is an explanatory diagram for determining the series capacitance in Fig. 4, and gas is a cross-sectional view showing another embodiment of the present invention. It is a diagram. l~64...Conductor turn, M, B, C, D,
A'. B'...Connection point. (Fig. 1, Fig. 2) (, jX, 4, Fig. 3, Fig. 4, Fig. 5, Fig. 6)

Claims (1)

[Claims] A 2m conductor (1 is a natural number) is wound from the outside of the coil to the inside to form a first unit plate coil. A second unit plate-like fill is formed by forming an arc-length cutting part on the inside of the second unit plate-like coil, and a second unit plate-like fill that extends from the inside of the coil toward the outside. 9) Grind the unit plate coil to the outside of the third unit plate coil. 9) Wind the fill from the outside to the inside. Without cutting the whole conductor, extend the third unit plate-shaped coil to the inside of the 40th unit plate-shaped coil and wind it from the inside of the fill to the outside. One of the conductors of the outermost turn of the 40th unit plate-like twill of the IQOw coil group.
This electric machine is characterized in that the main coil is connected to another adjacent coil group without being cut, and one of the coils of 1111) is connected to one of the conductors of the outermost turn of the jllo unit plate coil 0. Steamed rice coil.