KR100795572B1 - Solid-state insulated pole transformer and its manufacturing method - Google Patents

Abstract

The present invention relates to a method for manufacturing a solid-state insulated column transformer, comprising: (a) winding a low voltage winding and a high voltage winding together in an insulating material to form respective primary windings and secondary windings; (b) inserting the primary winding part and the secondary winding part into an iron core manufactured by a winding core method to form an internally-type transformer body; (c) having the external shape corresponding to the external shape of the transformer main body, having the settled space of the transformer main body therein, and placing the assembled transformer main body in an enclosure mold provided with a space of a high pressure bushing, a low pressure bushing, and a ground end; Extracting the leader line in the fastening position at the corresponding position; And (d) preliminarily drying the transformer body and the enclosure and injecting a liquid synthetic resin into the enclosure mold in a high vacuum state to mold the transformer enclosure, and then hardening the synthetic resin into a solid state in which the transformer body is embedded. Forming a molded enclosure; Characterized in that it comprises a.

Description

Solid-state insulated column transformer and its manufacturing method {POLE TRANSFORMER AND A METHOD FOR MANUFACTURE THEREOF}

1 shows a mold transformer in a conventional manner.

Figure 2 is a view showing a solid insulated columnar transformer to which the present invention is applied.

3 is a perspective view showing a bobbin to which the present invention is applied.

4 is a plan view showing a winding unit to which the present invention is applied.

5 is a view for explaining the terminal arrangement of the winding portion to which the present invention is applied.

6 is a perspective view showing an iron core to which the present invention is applied.

7 is a perspective view showing a transformer body to which the present invention is applied.

8 is a view for explaining the elastic body insertion of the iron core in the transformer body to which the present invention is applied.

9 is a view for explaining the leader line in the transformer body to which the present invention is applied.

10 is a cross-sectional view showing an enclosure mold to which the present invention is applied.

11 is a cross-sectional view showing a main body insertion state of an enclosure mold to which the present invention is applied.

12 is a view for explaining a molding process to an enclosure mold to which the present invention is applied.

13 is a view showing a transformer enclosure to which the present invention is applied.

14 is a process chart for explaining a method for manufacturing a solid insulated column-phase transformer of the present invention.

The present invention relates to a solid-state insulated column transformer and a method of manufacturing the same, and more particularly, in the manufacture of a mold transformer for outdoor use, the entire core is surrounded by an iron core and an inner winding of the inner body without molding the windings with epoxy resin. The present invention relates to a solid insulated columnar transformer configured by molding with an integral epoxy resin, silicone resin, or ethylene propylene rubber (EPDM), and a method of manufacturing the same.

All current transformers currently in use are inlet transformers. These columnal inlet transformers enclose the transformer body in an enclosure and contain oil (insulating oil) for winding insulation and cooling. In addition, by installing the lydata in the enclosure to facilitate the circulation of the oil according to the heat while increasing the heat dissipation area to increase the cooling efficiency.

However, in the case of such an inlet transformer, a lot of fires are caused by an oil spill accident, an overload or a short circuit accident, so there are not many casualties. In addition, there is a disadvantage that the maintenance cost is also high because the maintenance of the transformer must be continued.

On the other hand, the mold transformer is being developed to replace the inlet transformer has excellent heat resistance, flame retardancy and the like compared to the inlet transformer and can be applied as a column transformer because no repair work for insulating oil.

Such a mold transformer is a transformer in which the core and the winding are not submerged in insulating oil and the winding is solid-insulated using a resin such as epoxy. In general, the high voltage winding and the low pressure winding are separated and molded with epoxy resin and concentric with the core. Is placed.

This conventional mold transformer is shown in FIG.

The transformer body 10 in which the primary winding 12 and the secondary winding 13 are assembled with the iron core 11 is enclosed in the enclosure 20 of the transformer closed by the enclosure lid 21 in the mold transformer. The high pressure bushing 22 and the low pressure bushing 23 are provided at predetermined portions of the outer circumferential surface of the enclosure 20, respectively.

At this time, the mold transformer of the conventional method is formed by molding the high-voltage winding and the low-voltage winding in an integral manner using an epoxy resin to form a molding 14 surrounding the winding to achieve insulation and cooling.

However, such a conventional mold transformer is not only poor insulation performance, but also to increase the cooling power to reduce the loss and increase the size of the ventilation area, thereby increasing the overall weight and dimensions, and the air exposure of the core portion There are drawbacks that cause functional degradation and corrosion due to moisture absorption of the outside air, which is a problem in practical use.

The present invention has been made to solve the above problems, the object of the present invention is to manufacture a mold transformer for use in the outdoor, the winding is not molded with epoxy resin alone, the inner core body and the entire enclosure surrounding the windings are integrated It is to provide a solid insulated column-phase transformer formed by molding with epoxy resin, silicone resin or ethylene propylene rubber (EPDM) of the present invention.

According to an aspect of the present invention, there is provided a solid insulation columnar transformer comprising: a transformer body configured by assembling a primary winding portion and a secondary winding portion to an iron core; The transformer body is placed inside, and the outer circumferential surface on which the high pressure bushing, the low pressure bushing, and the ground end are provided and the inner space surrounding the transformer body are integrally molded with a synthetic resin to have an appearance form corresponding to the appearance form of the internal transformer body. An enclosure formed; Characterized in that it comprises a.

Preferably, the transformer body may include a primary winding portion and a secondary winding portion in which the high voltage winding and the low voltage winding are insulated from each other and wound together; And an iron plate having an annular steel plate, the iron core having the primary winding portion and the secondary winding portion inserted correspondingly to form a magnetic path. Characterized in that it comprises a.

More preferably, the primary winding portion and the secondary winding portion, the inner winding bobbin having a hollow form and made of an insulating material; A low pressure winding wound around the inner winding bobbin; A main insulating winding bobbin wound around the low voltage winding and made of an insulating material; And a high voltage winding wound around the main insulation winding bobbin in an alignment winding manner. Characterized in that it comprises a.

More preferably, the low voltage winding and the high voltage winding are formed by wrapping insulating paper in a coil, and an insulating material is inserted between the inner winding bobbin and the low voltage winding and between the main insulating winding bobbin and the high voltage winding to prevent cracking of the synthetic resin. It is characterized by.

More preferably, the outer surface of the high-pressure winding that is the outermost of the primary winding portion and the secondary winding portion is characterized in that the insulator of the double structure is inserted to prevent cracking of the synthetic resin.

More preferably, the inner winding bobbin and the main insulated winding bobbin is characterized in that the molded resin.

More preferably, the outer surface of the iron core is characterized in that the elastic body having a predetermined elasticity is inserted in order to prevent cracking of the synthetic resin.

More preferably, the synthetic resin is at least one of an epoxy resin, a silicone resin or an ethylene propylene rubber material.

On the other hand, the present invention relates to a method for manufacturing a solid-state insulated column transformer, comprising the steps of: (a) winding a low voltage winding and a high voltage winding together in an insulating material to form respective primary windings and secondary windings; (b) inserting the primary winding part and the secondary winding part into an iron core manufactured by a winding core method to form an internally-type transformer body; (c) having the external shape corresponding to the external shape of the transformer main body, having the settled space of the transformer main body therein, and placing the assembled transformer main body in an enclosure mold provided with a space of a high pressure bushing, a low pressure bushing, and a ground end; Extracting the leader line in the fastening position at the corresponding position; And (d) preliminarily drying the transformer body and the enclosure and injecting a liquid synthetic resin into the enclosure mold in a high vacuum state to mold the transformer enclosure, and then hardening the synthetic resin into a solid state in which the transformer body is embedded. Forming a molded enclosure; Characterized in that it comprises a.

Preferably, the step (a) comprises: (a-1) inserting an insulating material to prevent cracking of the synthetic resin on the outer surface of the inner winding bobbin, which is an insulating material for winding the low voltage winding; (a-2) winding a low pressure coil a plurality of times on the inner winding bobbin having an insulating material inserted into the outer surface thereof; (a-3) inserting a main insulating winding bobbin, which is an insulating material, on the wound low voltage coil, and inserting an insulating material on the outer surface of the main insulating winding bobbin to prevent cracking of the synthetic resin; And (a-4) winding the high voltage coil on the main insulating winding bobbin having an insulating material inserted into the outer surface thereof in an alignment winding method to form a winding portion. Characterized in that it comprises a.

More preferably, the low pressure winding and the high pressure winding is formed to wrap the insulation paper in the coil, the outer surface of the high-pressure winding, the outermost of the winding portion is characterized in that the insulator of a dual structure is inserted to prevent cracking of the synthetic resin.

More preferably, the inner winding bobbin and the main insulated winding bobbin is characterized in that the molded resin.

More preferably, the outer surface of the iron core is characterized in that the elastic body having a predetermined elasticity is inserted to prevent cracking of the synthetic resin.

More preferably, the synthetic resin is at least one of an epoxy resin, a silicone resin or an ethylene propylene rubber material.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, the present invention does not mold only the windings with epoxy resin in manufacturing a mold transformer used for outdoor use, and the entire body surrounding the core and the inner core of the winding is an integral epoxy resin, silicone resin or ethylene propylene rubber (EPDM). A solid insulated column-phase transformer and a method of manufacturing the same will be described as a preferred embodiment, but the technical idea of the present invention is not limited thereto and can be variously modified and modified by those skilled in the art.

2 is a view showing a solid insulated columnar transformer to which the present invention is applied.

Referring to FIG. 2, the solid insulated columnar transformer to which the present invention is applied is largely composed of a transformer main body 100 and a transformer enclosure 200 for placing the transformer main body 100.

Here, the transformer enclosure 200 converts the low pressure bushing 210, the high pressure bushing 220, and the ground terminal 230 to which the low pressure coil and the high pressure coil drawn from the transformer body 100 are connected, and the output power. The tab plate 240 is provided, and the transformer enclosure 200 is integrally molded with an epoxy resin, a silicone resin, or an ethylene propylene rubber (EPDM) material in a state in which the transformer body 100 is placed. At this time, the low pressure bushing and the high pressure bushing are also formed by molding an epoxy resin, a silicone resin or an ethylene propylene rubber (EPDM) material together in molding the transformer body 100 in the transformer body 100 formed of such an integral molding. .

That is, the transformer enclosure 200 is formed by injecting a liquid epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material into the enclosure mold while the transformer body 100 is positioned inside the enclosure mold. Unlike the conventional mold transformer technique, the inside thereof is filled with an epoxy resin, and the outer surface thereof is integrally molded by an epoxy resin, thereby forming a surface of an epoxy resin, a silicone resin, or an ethylene propylene rubber (EPDM) material.

The transformer enclosure 200 is molded to have a quadrangular shape as a whole. This is because the transformer body 100, which is an assembly of an iron core and a winding part placed therein, has a quadrangular shape as a whole, so that the transformer enclosure has a corresponding rectangular shape. 200 will be molded. Because, when the transformer enclosure is formed in a cylindrical shape as in the prior art, many epoxy resins are used due to the nature of the present invention, which does not correspond in shape to the transformer body inside and fills both the inside and the outside of the transformer enclosure with an epoxy resin. Because it happens.

Therefore, the transformer made of epoxy resin adopts the solid insulation method of the epoxy resin rather than the oil insulation method as in the conventional inlet transformer, so that the risk of explosion as in the inlet-type transformer is eliminated, and the maintenance is easy. It is easy and prevents environmental pollution by using no oil.

In addition, the transformer made of epoxy resin has excellent cooling characteristics by epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material, compared to the conventional mold transformer in which only the winding is solid-insulated using resin such as epoxy. The structure can be naturally convection based only on the epoxy resin surface without the installation of a radiator, which makes it possible to reduce other costs in auxiliary equipment.

Meanwhile, the transformer body 200 is configured by assembling the primary winding unit 120 and the secondary winding unit 130 with the iron core 110, and the primary winding unit 120 and the secondary winding unit 130. Each of) is made up of a winding of a low pressure winding and a high pressure winding.

Now, the transformer body 200 will be described in detail with reference to FIGS. 3 to 8.

The primary winding 120 and the secondary winding 130 constituting the transformer body 200 is configured by winding a low voltage coil first to an internal winding bobbin and winding a high voltage coil to a main insulation bobbin covering the first winding 120. .

3 shows a bobbin to which the present invention is applied.

The bobbin is used as the inner winding bobbin 141 or the main insulated winding bobbin 142 to form a winding of the coil, and has a rectangular cylindrical structure having a rectangular cross section inside. The inner winding bobbin 141 or the main insulation winding bobbin 142 is made of an insulating material for insulation. That is, the inner winding bobbin 141 should be insulated from the iron core 110 when assembled with the iron core 110, and the main insulation winding bobbin 142 is a low-voltage winding 143 and a high-pressure winding 146 of the inside and outside This is because insulation must be made between

At this time, the inner winding bobbin 141 or the main insulating winding bobbin 142 may be made of an epoxy resin as an insulating material.

This winding structure is well illustrated in FIG. 4.

4 is a plan view showing a winding unit to which the present invention is applied.

Referring to FIG. 4, the primary winding part 120 or the secondary winding part 130 has a low voltage winding 143 wound around an inner winding bobbin 141, which is an insulating material therein, and an insulating material on the corresponding low pressure winding 143. The main insulated winding bobbin 142 is covered and the high voltage winding 146 is wound around the main insulated winding bobbin 142.

Accordingly, the winding parts 120 and 130 to be assembled to the iron core 110 are insulated from the iron core by the inner winding bobbin 141, and the winding portion 120 is formed by the main insulation winding bobbin 142. The low voltage winding 143 and the high voltage winding 146 forming 130 are insulated.

At this time, as can be seen in the enlarged view of the portion of FIG. 4, the low-voltage winding 143 is a glass insulating material 145 is an insulating material to prevent cracking of the epoxy resin in the inner winding bobbin 141. After the first insertion, the low pressure coil 144 is wound in multiple layers. The low pressure coil 144 is a plate conductor made of aluminum, and the outer surface of the winding layer is attached with insulating paper 144a, which is a glass insulating material. Insulation is achieved.

In addition, the high-voltage winding 146 is a high-pressure after the primary insulating winding bobbin 142 surrounding the low-voltage winding 143 is inserted into the insulating material 145 of the glass material of an insulating material to prevent cracking of the epoxy resin first The coil 147 is wound in multiple layers. The high-pressure coil 147 is a plate conductor made of aluminum, and the outer surface of the coil 147 is attached with insulating paper 147a, which is made of glass insulating material, to insulate the coils.

Here, the high-voltage winding 146 is designed to have an equal potential distribution between sections as shown in FIG. 5, so that the high-voltage coil 147 is wound in an alignment winding method.

Here, the inner low pressure winding 143 and the outer high pressure winding 146 are wound in the outermost layer of the winding portion (120, 130) is inserted into the insulating material 148 of the glass material of a double structure. Since the insulator 148 is covered by the solidified epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material of the winding parts 120 and 130, the coupling force between the epoxy resin and the winding is doubled in case of a load-side short circuit accident. This prevents cracking of the epoxy resin.

5 is a view for explaining the arrangement of the terminals of the winding portion to which the present invention is applied.

Referring to FIG. 5, one end of the low pressure coil 144 wound on the inner winding bobbin 141 in the winding parts 120 and 130 is a (+) side low pressure coil lead-out terminal A, and the other end thereof is a (−) side. Low pressure coil lead-out terminal (B). One end of the high voltage coil 147 wound around the main insulation winding bobbin 142 in the winding parts 120 and 130 is a (+) side high voltage coil drawing terminal C which is a line side, and the other end thereof is the ground side ( High voltage coil lead-out terminal (D).

The (+) side of the low pressure coil lead-out terminal (A) and the (-) side of the low pressure coil lead-out terminal (B) of the low pressure coil 144 is connected to the low pressure lead-out wire 211 and integrally formed with an epoxy resin, It is connected to the low pressure bushing 210 molded of a silicone resin or ethylene propylene rubber (EPDM) material, and the line-side high pressure coil lead-out terminal C of the high pressure coil 147 is also connected to the high pressure lead-out line 221 to be connected to the enclosure 200. It is integrally connected to a high pressure bushing 220 molded of an epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material.

Next, the iron core 110 is formed by inserting the primary winding 120 and the secondary winding 130 described above through the incision 111 to form a magnetic path, as shown in FIG. Likewise, it is manufactured by the winding core method, which is made by winding a thin strip of silicon steel plate in a ring shape. Here, the silicon steel sheet is a kind of soft magnetic material, and is a steel sheet manufactured by adding a small amount of silicon (Si) to iron (Fe).

Accordingly, the main body 100 forms a core type transformer in which the primary winding 120 and the secondary winding 130 are wound on both legs of the iron core 110. 100 is shown in FIG. 7.

Referring to FIG. 7, as described above, an insulator 148 is inserted into the primary winding part 120 and the secondary winding part 130 assembled to the iron core 110, thereby molding an epoxy resin and a silicone. Cracking is prevented by increasing the bonding force with the resin or ethylene propylene rubber (EPDM) material.

Likewise, as shown in FIG. 8, the elastic body 112 is inserted into the outer surface of the iron core 110. The elastic body 112 has a predetermined elasticity to prevent cracks due to shrinkage and expansion of the silicon steel sheet and epoxy resin forming the iron core 110, and also the epoxy resin in a state in which the main body 100 is embedded. When the external impact after the movement or installation of the transformer of the present invention having an enclosure 200 molded of silicone resin or ethylene propylene rubber (EPDM) material, the contact shock between the epoxy resin and the inner body 100 is alleviated.

In this case, the elastic body 112 is inserted into both the inner and outer surfaces of the iron core 110 in contact with the epoxy resin, the elastic body 112 may be made of a rubber or glass material having elasticity.

9 shows a terminal of the coil drawn out from the main body 100.

As shown in FIG. 9, the (+) side high pressure coil lead-out terminal C, which is a line side drawn out from the winding parts 120 and 130, is connected to the high-pressure lead-out line 221 to be integrally epoxy to the enclosure 200. (-) Side high pressure coil lead-out terminal (D) connected to the ground lead wire (231) is fastened to the high-pressure bushing 220 molded of a resin, silicone resin or ethylene propylene rubber (EPDM) material. It is fastened to ground terminal 230 molded with epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material integrally to the (+) side low pressure coil lead-out terminal (A) and (-) side low pressure coil lead-out terminal (B). ) Is coupled to the low pressure leader line 211 and fastened to the low pressure bushing 210 molded integrally with the enclosure 200 and molded with an epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material.

An integrated transformer enclosure 200 molded from such epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material will now be discussed with reference to FIGS.

10 is a cross-sectional view showing an enclosure mold to which the present invention is applied, FIG. 11 is a cross-sectional view showing a main body insertion state of an enclosure mold to which the present invention is applied, and FIG. 12 illustrates a molding process to an enclosure mold to which the present invention is applied. 13 is a view showing a transformer enclosure to which the present invention is applied.

First, the enclosure mold 300 illustrated in FIG. 10 includes both the low voltage bushing 210, the high pressure bushing 220, and the ground end 230, which not only accommodate the transformer body 100 but also have external connections. Accordingly, the low pressure bushing 210, the high pressure bushing 220, and the ground end 230 are all made of an epoxy resin, a silicone resin, or an ethylene propylene rubber (EPDM) material molded in the enclosure mold 300.

As shown in FIG. 11, the transformer body 100, in which the winding and the iron core are assembled, is embedded in a corresponding enclosure mold 300, and the fastening of each lead wire A, B, C, and D of the transformer body 100 is completed. After preliminary drying of the built-in transformer body 100 and the enclosure mold 300 in one state, a liquid epoxy resin, silicone resin or ethylene propylene in the enclosure mold 300 in a high vacuum state as shown in FIG. Rubber (EPDM) material is injected into the mold. Here, the position of the liquid epoxy resin injection hole with respect to the enclosure mold 300 may be located anywhere, and is not shown in the drawings.

And through the hardening of the first and second, with the transformer body 100 as shown in Figure 13 with the epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material is integrally molded with a solid enclosure 200 A transformer will be made.

Now, a method of manufacturing the solid insulated pillar-phase transformer of the present invention will be described with reference to FIG.

First, in the insulating material processing step S1 for the inner winding bobbin, an insulating material 145 of grass material, which is an insulating material, is inserted into an outer surface of the inner winding bobbin 141, which is an insulating material for winding the low voltage winding 143.

Next, in the low pressure coil winding step (S2), the low pressure coil 144 is wound many times on the inner winding bobbin 141 into which the insulating material 145 is inserted.

At this time, the low-voltage coil 144 is an aluminum plate conductor, the outer surface of the insulating paper 144a, which is an insulating paper, is attached to form insulation between the winding layers.

Next, in the insulating material processing process (S3) for the main insulated winding bobbin, the main insulated winding bobbin 142, which is an insulating material for winding the high-voltage winding 146, is inserted on the wound low-voltage coil 144 and the corresponding main The insulating winding bobbin 142 is inserted into the insulating material 145 of the glass material which is an insulator on the outer surface.

Next, in the high pressure coil winding step (S4), the high pressure coil 147 is wound by the winding winding method to the main insulation winding bobbin 142 in which the insulating material 145 is inserted.

Next, in the insulator treatment process (S5) for the windings, cracks are prevented in the outermost layers of the winding parts 120 and 130 in which the inner low pressure winding 143 and the outer high pressure winding 146 are wound. Insert a glass material insulator 148 of a dual structure for.

Next, in the iron core and the winding unit assembly process (S6), the primary winding portion 120 and the secondary winding portion 130 made through the above-described step S1 to S5 to the iron core 110 produced by the winding core method Inserted and assembled to create a transformer body 100 of the iron-resistant type.

Next, in the elastic body treatment process (S7) for the iron core, the crack due to the shrinkage and expansion of the epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material to be molded and solidified with the silicon steel sheet constituting the iron core 110 ( In order to prevent cracks, the elastic body 112 having a predetermined elasticity is inserted into an entire outer surface of the assembled iron core 110.

Next, in the transformer body settling and leader line fastening step (S8), not only the accommodation space of the transformer body 100 but also the space of the low pressure bushing 210, the high pressure bushing 220, and the ground end 230 to which the leader line is fastened. In addition, the assembled transformer body 100 is placed in the enclosure mold 300 which is integrally provided together, and the (+) side high pressure coil withdrawal, which is the line side drawn out from the winding parts 120 and 130 of the transformer body 100, is drawn out. The terminal C is connected to the high voltage lead wire 221 to be fastened to the position of the high pressure bushing 220, and the (-) side high pressure coil lead terminal D, which is a contact side, is connected to the ground lead wire 231 to ground. The position of the low pressure bushing 210 is connected to the position of the stage 230, and the (+) side low pressure coil lead terminal (A) and the (-) side low pressure coil lead terminal (B) are connected to the low pressure lead wire (211). Fasten to

Next, in the preliminary drying step (S9), the enclosed transformer body 100 and the enclosure mold 300 are preliminarily dried before the epoxy resin molding.

Next, in the epoxy resin injection and curing process (S10) for the enclosure mold, a liquid epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material is injected into the enclosure mold 300 in a high vacuum state, thereby transforming the transformer enclosure (200). ) And through the hardening operation to make the enclosure 200 in which the epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material is integrally molded into a solid state with the transformer body 100 embedded therein.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to the drawings shown.

As described above, the solid-insulated columnar transformer and the manufacturing method thereof according to the present invention do not mold the windings with epoxy resin in the manufacture of a mold transformer for outdoor use, and the entire enclosure surrounding the core and the windings as the inner body. By molding the molded body with an integral epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material, it is possible to reduce the size of the transformer body and to eliminate insulation accidents due to moisture absorption.

In addition, the entire transformer can be miniaturized and lightened by molding the entire enclosure with an epoxy resin without using an enclosure made of a steel plate, and the entire transformer is composed of an integral epoxy resin, silicone resin, or ethylene propylene rubber (EPDM) material. As a result, it has a high mechanical strength to maintain a robust structure even in the vibration of the transformer installation and transportation.

In addition, by inserting an elastic body into the core of the transformer body in the enclosure made of epoxy resin, silicone resin or ethylene propylene rubber (EPDM) material integral type epoxy resin of the molding part with the same expansion coefficient of the dissimilar material according to the load variation during operation of the transformer, There is also an effect that can prevent cracking of the silicone resin or ethylene propylene rubber (EPDM) material.

In addition, since all the enclosures including bushings are integrally formed with epoxy resin, silicone resin, or ethylene propylene rubber (EPDM) material, the productivity can be improved by reducing a work process for installing a separate bushing.

Claims (14)

delete delete A transformer body constructed by assembling the primary winding portion and the secondary winding portion to an iron core; The transformer body is placed inside, and the outer circumferential surface on which the high pressure bushing, the low pressure bushing, and the ground end are provided and the inner space surrounding the transformer body are integrally molded with a synthetic resin to have an appearance form corresponding to the appearance form of the internal transformer body. An enclosure formed; Including, The transformer body, A primary winding portion and a secondary winding portion in which the high voltage winding and the low voltage winding are insulated from each other and wound together; And An annular steel sheet is constructed in a winding core method, and the primary winding portion and the secondary winding portion are inserted to correspond to each other to form a magnetic core; Including; The primary winding portion and the secondary winding portion, An inner winding bobbin having a hollow shape and made of an insulating material; A low pressure winding wound around the inner winding bobbin; A main insulating winding bobbin wound around the low voltage winding and made of an insulating material; And A high voltage winding wound around the main insulated winding bobbin in an alignment winding manner; Solid insulated columnar transformer comprising a. The method of claim 3, wherein The low voltage winding and the high voltage winding are formed by wrapping an insulating paper in a coil, and an insulating material is inserted between the inner winding bobbin and the low pressure winding and between the main insulating winding bobbin and the high voltage winding to prevent cracking of the synthetic resin. Solid insulated columnar transformer. The method of claim 3, wherein Solid-state insulation columnar transformer, characterized in that the insulator of a double structure is inserted into the outer surface of the high-voltage winding, the outermost of the primary winding and the secondary winding to prevent cracking of the synthetic resin. The method of claim 3, wherein And the inner winding bobbin and the main insulated winding bobbin are molded of a synthetic resin. delete delete (a) winding the low and high voltage windings together in an insulating material to form respective primary windings and secondary windings; (b) inserting the primary winding part and the secondary winding part into an iron core manufactured by a winding core method to form an internally-type transformer body; (c) having the external shape corresponding to the external shape of the transformer main body, having the settled space of the transformer main body therein, and placing the assembled transformer main body in an enclosure mold provided with a space of a high pressure bushing, a low pressure bushing, and a ground end; Extracting the leader line in the fastening position at the corresponding position; And (d) pre-drying the transformer body and the enclosure, and injecting a liquid resin in the mold of the enclosure in a high vacuum state to mold the transformer enclosure, and then hardening the synthetic resin into a solid molded body in a state in which the transformer body is embedded. Forming a closed enclosure; Solid-state insulation columnar transformer manufacturing method comprising a. The method of claim 9, In step (a), (a-1) inserting an insulating material on the outer surface of the inner winding bobbin which is an insulating material for winding the low pressure winding to prevent cracking of the synthetic resin; (a-2) winding a low pressure coil a plurality of times on the inner winding bobbin having an insulating material inserted into the outer surface thereof; (a-3) inserting a main insulating winding bobbin, which is an insulating material, on the wound low voltage coil, and inserting an insulating material on the outer surface of the main insulating winding bobbin to prevent cracking of the synthetic resin; And (a-4) forming a winding part by winding a high voltage coil in an alignment winding method on the main insulating winding bobbin having an insulating material inserted into an outer surface thereof; Solid-state insulation columnar transformer manufacturing method comprising a. The method of claim 10, The low voltage winding and the high voltage winding is formed by wrapping an insulating paper in the coil, the outer surface of the high-pressure winding, the outermost portion of the winding portion is a solid insulation columnar transformer manufacturing method characterized in that the insulation of the double structure is inserted in order to prevent cracking of the synthetic resin . The method of claim 10, The inner winding bobbin and the main insulated winding bobbin is molded of a synthetic resin, characterized in that the solid-state insulating column transformer. The method of claim 9, Solid-state insulating columnar transformer manufacturing method characterized in that for inserting an elastic body having a predetermined elasticity to prevent cracking of the synthetic resin on the outer surface of the iron core. The method according to any one of claims 9 to 13, The synthetic resin is at least one of an epoxy resin, a silicone resin or ethylene propylene rubber material manufacturing method of the solid-state insulation columnar transformer.

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