JPS59159515A - Foil-wound transformer - Google Patents

Abstract

PURPOSE:To prevent the deformation of a foil-wound coil wound by superposing a foiled conductor and an insulating sheet by superposing the sheet on the lower surface of the coil, bending the sheet and supporting with an insulating support. CONSTITUTION:A foiled conductor 2 and an insulating sheet 3 are superposed on the outside of a core 1, and wound to form a low voltage coil 4 and a high voltage coil 5. An annular cooling duct 6 is provided in each coil, connected to a liquid collecting tube 11 via an insulating pipe 12, coolant is circulated into the duct 6 by a pump 8, thereby absorbing the heat generated in the coil. In the support of the coil, the sheet 3 is bent, superposed, the superposed part of the sheet is supported by an insulating support 15 made of epoxy or alumina, thereby preventing the coil from deforming or displacing.

Description

[Detailed Description of the Invention] 1-Technical Field to which the Invention Pertains] This invention [1!1] has a cooling duct built into a coil formed by winding 17 layers of a foil-like conductor 3 and an insulating sheet twisted together by 1A. 2. Related to foil-wound transformers - J-19 [Prior art, u-f, - problems] Foil is wound on the transformer, and the space factor of the conductor is good, so the wire conductor is Month 1 / ζ change F (: vessel, -L-style L7 te small and light weight all'#: JP-' + sign ga I;, a) is.
, High IL Applicable to large capacity transformers - J-Luni (r
-1,=:=j Cooling capacity for I+ is 1-spi,
1l Jl isa, Enmen, jJ-1 also in 11 il)
-Built-in fill 1 no q K a no 41 reri 1,
The refrigerant is poured into this cooling duct, and the heat generated from the body is directly applied to it.
has been done.

This 11th, conventional foil-wound transformer is shown in Figure 1 1f('-)1
The coil body is constructed by stacking the foil conductor (2) and the insulation layer (3) on the outside of the iron core (1) as shown in Figure 1. 5). These φ) each′: φ71− +;′q kζtd
: Th'ff like? '1) Is there a built-in cooling duct (6)? Reino, Freon R113 for 11 tact
, Fe12Kichitsu/2-Hairyuko(7)σ) The thin space that can circulate is yt,', formed Jl), ;:, 3, S-on to Dl+'(7) is pumped by pump (8) Circulate, insert foil wrapping (/Lρ・]C);
9) Cooling water (10)-ζ2 cooling/sink '1. , this cooled first refrigerant is further fed into the cooling chamber (7) (8) and (4). ? f''1.1 cooling hood circulation cycle j, fi, -J-Z). The liquid collection pipe (111) is connected to the flow LIX side (C concentrates and the -C refrigerant can flow in and out).The collection K1. ) is sleeping, so the cooling tank is in use.
In order to maintain good insulation, the inflow and outflow passages of each cooling duct are connected with an insulating vibrator (1', j), and the tank (
13), the earth potential is old. The potential of the cooling duct is electrically coupled to the same potential as the foil-wound conductor in the coil. ('
! It is insulated with an insulating medium (14) such as oil or gas.In Figure 1, the lead wire from the conductor and the lead wire leading out of the tank are omitted. It is.

Well, this type of foil-wound transformer has a circulation channel through which gold sand flows for cooling, and a gauze edge for insulation. In particular, it will be referred to as a separate foil-wound transformer 2n.

This separate sheet type foil-wound transformer is significantly smaller and lighter.
+1.4j with high insulation reliability, etc.
I have 1L.

In a conventional mismatched lit transformer as shown in Figure 1, foil winding =
During the production of 1-j, a frictional force acts between the foil-like conductor and the insulation sheet due to the contraction force of the foil-like conductor.
However, in large-capacity transformers, the electrical sealing of the foil-wrapped coil is difficult, and the conventional foil-wrapped conductor is supported only by the frictional force between the foil-wrapped conductor and the insulating sheet. The coil had a defect due to insufficient support.

[Object of the invention] The object of the invention (to solve shortcomings/r, d) is to provide a foil-wound transformer that can stably support a foil-wound coil. .

1j Overview of the invention @] This invention is a foil formed by bending and overlapping insulating sheets protruding from the foil-like bodies on the upper and lower end surfaces of a foil-wound coil, and supporting the overlapping insulating sheets with insulating supports. It is a winding transformer.

``Effects of the Invention'' According to the present invention, the foil-wound coil n1, electromagnetic force, thermal cycle (τ) causes expansion and contraction of the foil-shaped conductor and insulation sheet (y), and ease of transporting the foil-wound transformer. It can prevent deformation and slipping of foil-wrapped coils due to force.

"Embodiment of the Invention" FIG. 2 is an enlarged view showing a schematic configuration of an embodiment of the present invention. Leap 6 same part ke 1 [) 1 - No sign is added. Insulating sheath for supporting part of foil wrapping 21 1. (3)
Bend and stack the overlapping parts of the insulating sheets, then partially or completely remove the overlapping parts of the insulating sheets using an insulating support material (15
), and the - side of the insulating support is fixed to the tank (131 (not shown)). −
Or it may be the entire surface.

FIG. 3 is a partially enlarged view showing another embodiment.

In this embodiment, in order to improve the dielectric strength between the insulating sheets, an insulating support (I5) is placed on the part where the insulating sheet (3) protrudes from the foil conductor by overlapping KP and border (Iff!). This is what I did to support Rukokichi t)Z).

As described above, by bending and overlapping the insulating sheets protruding from the foil-like conductor of the 9 coils, the foil-wound coil can be easily supported with an insulating support 1.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional schematic diagram showing a conventional foil-wound transformer using a foil-wound coil, Fig. 2 is an enlarged view of an embodiment of the present invention, and Fig. 213 is a further embodiment of the present invention. il, is an enlarged view. 2...1i city conductor, :3...edge/-to, 15
... Insulating support 4J1,] 6-N color border 3, Fig. 1 Fig. 2 Fig. 8 A73-

Claims (1)

[Claims] Rolling the foil conductor and insulating sheet over and over ii 1-
In a foil-wrapped transformer consisting of a transformer with a built-in cooling 4 actuator stored in a transformer tank, the front H
If you overlap and bend the insulation parts in part or the whole part (1), you can make the foil-wrapped coil coil into insulation 1.
-4′,! , characterized by stiffness supported by tools, J-, i-
Press the foil with yA5 pressure,