JPS5961109A - Multi-layer cylindrical winding - Google Patents

Abstract

PURPOSE:To increase insulating strength between layers in a split cylindrical winding and improve cooling efficiency, by a method wherein a cooling medium passage is formed between split windings and made one layer for multi-layer cylindrical winding, and plural layers are overlaid with intermediary of interlayer insulation paper so as to constitute multi-layer cylindrical winding. CONSTITUTION:A split cylindrical winding 10 is wound to an interlayer insulation paper 20 and arranged circumferentially. The split cylindrical winding 10 has two split windings 10a, 10b, and a cooling medium passage 30 is formed between split windings 10a, 10b. The cooling medium passage 30 is provided on outside of the split winding 10a wound to the interlayer insulation paper 20 and cools the split windings 10a, 10b by flowing the cooling oil therein. The split winding 10b is wound on outside of the passage 30. The cooling medium passage 30 is formed between the split windings 10a, 10b of the split cylindrical windings 10 as above described and made one layer for the split cylindrical winding 10. Plural layers are constituted in multi-layer cylindrical winding through the interlayer insulation paper 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a multilayer cylindrical winding used as an induction winding in aerospace equipment.

[Technical background of the invention]

Multi-layer cylindrical windings are used in transformers, accelerators, etc., and are mainly used as high-voltage windings in core type transformers. This multi-layer cylindrical winding has a large opposing area between the cylindrical winding layers and a small number of cylindrical winding layers, so the surface alignment is large and there is very little displacement within the cylindrical winding. It has characteristics.

Figure 1 shows the external appearance of such a multilayer cylindrical winding.
The figure is a cross-sectional view taken along line 1-1 of a conventional multilayer cylindrical winding. The structure of the multilayer cylindrical winding of the secondary fang is as follows. First 7? A conductor is wound around the interlayer insulating paper I11, and one layer of cylindrical winding 28 is provided around the interlayer insulating paper JR. Next, a cooling passage 3a is provided around the outside of this cylindrical winding ffl2''.

Old 1V Jrtll insulation paper 1b is the sunset on the cooling path 3a
111, and the cylindrical winding 2b is also connected to the interlayer insulation phase -1.
It is wound around the outside of b. In this way, the inter-VCN insulating paper IRIIb..., the cylindrical windings 2J+, 2b..., the cooling paths 3s, 3b... are stacked one on top of the other. Cylindrical winding 2 a e 2 b ・-u4! The ends of the r layer are sequentially 1
It is sold directly in column 01. This multi-layer cylindrical winding is provided with a shield 4 around the outer cooling path 3e so that the whole becomes one winding Yt'! has been completed. The thickness of the interlayer insulating paper 1 a p l b... is thin at the connection part A of the cylindrical winding because no pressure is applied to I. The thickness of the interlayer insulating paper 18.lb... is determined by adjusting the 'i' generated in the cylindrical windings j12a, 2b... according to the positive value. There is.

In this way) 1. The multi-layer cylindrical winding has a small number of 11 positions inside the cylindrical winding due to the reason stated in ml.
In addition to the signs, the cooling roads 3a, 3b... are cylindrical windings of 2 m,
There is also a 71-Y characteristic that since it is provided parallel to 2b..., the flow of cooling oil is good and the cooling efficiency is easy.

[Problems with background technology]

However, the multilayer cylindrical winding described above has the following drawbacks. That is, cylindrical winding 21! , jψ of 2b...
Between the cooling roads 3a, 3b... and 1m of interlayer insulation paper,
It is composed of lb... So what is the cost rate of cooling oil? Assuming that the dielectric constant of ε weight and the interlayer insulating paper 1a, lb... is +1% 61, the magnitude of the dielectric constant is ε1<62. Therefore, the electric field applied to the cooling oil, which has a lower pressure resistance, than the interlayer insulating paper 1a, lb...
The 'hJ field that is applied to the Introduction to interlayer insulation: 1a.

The dimensional ratio between 1b... and the cooling road Js * 3b... becomes smaller and is applied to the cooling road 3a, 3b..., and the electric field becomes stronger as the interlayer insulating paper 1a, lb.
...In the fflB section, the effect was reduced by half and it became frozen.

Furthermore, the cooling efficiency of the cylindrical windings 2a, lb... is such that the temperature of the cooling oil is hardly transmitted from the interlayer insulating paper 1a, lb..., resulting in single-sided cooling.

[Purpose of the invention]

The present invention is a cylindrical winding '2! r! It is an object of the present invention to provide a multilayer cylindrical winding which can improve the insulation between the cylindrical windings and the cooling efficiency of the cylindrical windings.

[Summary of the invention]

The present invention is to divide the conventional cylindrical winding into one layer of cylindrical windings, connect them in parallel to form one layer of cylindrical windings, and provide all the layers of the divided cylindrical winding. ．． A cooling medium passage for cooling the divided cylindrical windings is provided between the divided cylindrical windings, and a plurality of layers are provided between the divided cylindrical windings and the cooling medium passages as a single gold layer. The present invention is characterized in that an interlayer insulating paper is provided in the wafer to achieve all of the above objects.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. 3. Figure 2 shows the multilayer cylindrical winding according to the present invention @ w 2.1
It is a sectional view shown about the xx' cross section shown in a figure. The windings in this multilayer circle f are constructed as described below.

A 1° segmented cylindrical winding without a trench is wound around an interlayer insulating paper 20. This divided cylindrical winding 10 has two divided windings 7o
It has a110bf, and this divided winding 'm1OR, 10br7
) is configured such that a cooling medium passage 30 is provided between f'
L. The cooling medium passage 3o is provided outside the divided winding 10B after passing through the interlayer insulating paper 20 in the divided winding 1011.
1. Cooling oil is passed through the entire divided winding l@lOn+10b. Then, the divided winding 10b is wound outside the coolant passage 30.

A scooped interlayer insulator 20 is wound around the outside 1111 of the divided winding 10b. In this way, the divided winding 10B of the divided cylindrical winding 10
, 10b is provided as a layer of the divided cylindrical winding 10, and an insulating paper 20f is provided between vi and IQ.
As shown in FIG. 3, a five-layer divided cylindrical winding 10 is provided. The divided cylindrical windings 10 of each layer are connected in 10 rows by sequentially connecting the ends of each layer. A shield 40'5 (circumferentially provided) is provided on the outside of the outermost divided winding 10b, and one winding is constructed as a whole.The divided cylindrical winding 100 and the divided windings 10R and 10b are provided in the next layer. In case, the third
As shown in the figure, there is a divided winding qlOb and a divided winding 1011 inside.
'(Place it outside.

The thickness of the interlayer insulating paper 20 is 111IA't- when the divided cylindrical winding 10 is connected with a predetermined thickness as in the conventional case.
It is thin and the side that is not connected is Bt-J\<.

Next, the multilayer cylindrical winding constructed as described above will be compared with a conventional nine-layer cylindrical winding. Fig. 4 (R) Ib) shows that the windings of the multilayer cylindrical winding are connected in the conventional case and in this embodiment.
l, the part B that isn't there? This is an enlarged view. Here, the conventional cooling oil passage 38 and the cooling medium passage 3oσ corner of this embodiment are d1, and the J width of the interlayer insulating paper is cylindrical winding 2nllOaJ1.
Side Bll't1 where 0b is not connected 11 degrees: 261
Let V be the voltage between the 100 layers of divided circular wires. First, we will compare the strength of the electric field between the layers. In the conventional multilayer cylindrical winding shown in FIG. 1C1 is as follows.

On the other hand, in the multilayer cylindrical winding of this embodiment shown in FIG. 3(b), the width of the cooling medium passage 30 and the interlayer insulating paper 20 is the same as the width of the conventional cooling road 3a and the interlayer insulating paper 1a. In this case, there is no cooling medium passage 30 between the layers in this embodiment. Therefore, 6 electric fields w: ztri are applied to the interlayer insulating paper 20.

■ v 2d d. From the above, the electric field E2 applied to the interlayer insulating paper 20 of this embodiment is equal to the electric field E2 applied to the conventional cooling road 3d: n
-E 1.16 times J.

Next, the interlayer capacitance will be compared. Therefore, I-
The opposing area ks% interlayer distance between the cylindrical winding 2a and the divided cylindrical winding 1o is d. The capacitance C1 of the conventional multilayer cylindrical winding is as follows, and the capacitance C2 of the multilayer cylindrical winding of this embodiment is as follows. Therefore, the ratio C2/C1 becomes 藏l ε2, and if (εl/suJ=0.65 and fL, then the electrostatic charge W'+ in this embodiment is 2.54 times larger than that in the conventional case. Become.

Therefore, the divided windings 10R, 10bt - parallel reading,
The coolant passage 30 is straddled between the divided wire-saving wires 10R and 10b to form one layer of the @ wire of the multilayer cylindrical winding, and this J'L is the interlayer insulating paper 20? A multilayer circle f1. ) Since the winding has a configuration of -2f''1., the electric field F,1 applied to the interlayer insulation layer 20 is 1.16 times the electric field F,1 exerted by the force 11 on the conventional cooling oil feeder 3a. The pressure resistance of the paper 20 is 93 to 5 times that of the cooling oil.Therefore, the multilayer cylindrical winding of this embodiment can significantly improve the insulation strength between layers compared to the conventional multilayer cylindrical winding. 30 is provided between the divided windings 10R and lobO where no potential difference occurs, total <H\,!T is not applied to the cooling W body passage 30.Therefore, cooling oil 'f' is not applied to the cooling medium passage 30.
Cooling oil is not a weak point in terms of dielectric strength.

The divided winding fQ10s, 10b is cooled by the divided winding lQR,1
Is it set between 0b? 1. Since this is done by the cooling medium passage 10, the divided cylindrical winding 10 is cooled from both sides, and the cooling efficiency can be further increased.

Note that the present invention is not limited to the above implementation f+1. For example, the interlayer insulating paper 20 may be made of a solid insulator with strong dielectric strength. Furthermore, in addition to oil as a cooling medium, a cooling gas or a pool having a low boiling point may be used. It is possible to apply the polycylindrical winding '-9 of the present invention to a gas insulated transformer or an evaporative cooling transformer that performs cooling using the latent heat of W of a fluid with a low boiling point. Even if a slow gas or a fluid with a low boiling point is used, no pressure is added to the cooling medium passage 30, so the breakdown pressure between the layers can be maintained as in the example described above.

〔Effect of the invention〕

The present invention is based on the following features:・minute i! The cooling medium passage is completely closed between the ll1 windings and the multilayer cylindrical winding =!・Set it up and put it into a Z-layer cylindrical roll by stacking 1 to 4 layers of paper with great effort between the layers! I decided to make a group, so one cylinder per minute)? A multi-layer cylindrical winding that can improve the dielectric strength between each layer of the gland and improve the effectiveness of the split cylindrical winding? can be provided.

[Brief explanation of drawings]

FIG. 1 is an external view of a multilayer cylindrical winding, FIG. 2 is a sectional view of a conventional multilayer cylindrical winding, and FIG. 3 is an embodiment of a multilayer cylindrical winding according to the present invention. Figure 4 (R)
, (b) is a partial cross-sectional view for comparing the cylindrical winding of each layer of the same example with the conventional one. DESCRIPTION OF SYMBOLS 10... Segmented cylindrical winding, 10: a, 10b... Segmented winding, 20... Interlayer insulation paper, 30... Cooling tube, body direction path, 40... Shield. Applicant's agent Patent attorney Takehiko Suzue Figure 3 A 08 Figure 4

Claims (1)

[Claims] In a multi-layer cylindrical winding with a plurality of N cylindrical windings, the cylindrical windings and the wires of each layer are separated (1) and the divided cylindrical windings are connected in parallel for each layer; divided tl,
a cooling medium passage provided between the divided cylindrical windings for cooling the divided cylindrical windings, through which a cooling medium passes; With an insulator? All features include multilayer cylindrical winding.