KR20110111643A - The method of coil for adhesive insulating paper of transformer - Google Patents

The method of coil for adhesive insulating paper of transformer Download PDF

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Publication number
KR20110111643A
KR20110111643A KR1020100030818A KR20100030818A KR20110111643A KR 20110111643 A KR20110111643 A KR 20110111643A KR 1020100030818 A KR1020100030818 A KR 1020100030818A KR 20100030818 A KR20100030818 A KR 20100030818A KR 20110111643 A KR20110111643 A KR 20110111643A
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KR
South Korea
Prior art keywords
coil
insulating material
coated
transformer
epoxy resin
Prior art date
Application number
KR1020100030818A
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Korean (ko)
Inventor
김창규
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한양전기공업(주)
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Priority to KR1020100030818A priority Critical patent/KR20110111643A/en
Publication of KR20110111643A publication Critical patent/KR20110111643A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/005—Impregnating or encapsulating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/127—Encapsulating or impregnating

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)

Abstract

The present invention wraps and coats an insulating material coated with a semi-cured epoxy resin on a coil in which an insulating material is wound and coated on a coil arranged concentrically on a core arm where a magnetic circuit of a yoke core is formed on the upper and lower parts. In addition, after the coil is coated with the insulating material, a secondary heat is applied to the insulating material, and a high-temperature insulator may be integrally formed by adhering the coil to the coil, and the present invention is coated with the insulating material coated with the epoxy resin part. Epoxy resin parts of mutual insulation material with neighboring coils are integrally bonded by the second row to form one unit without the occurrence of voids or pores, and even if the coil is powered and overloaded, the coil shakes and vibrates. The present invention relates to a coil to which an insulating material of a transformer is minimized and a molding method thereof. A method of forming a coil in which an insulating material of a transformer is attached to a coil arranged concentrically on a core arm on which a magnetic circuit of a yoke core is formed so as to be coated and coated, an epoxy resin part in a semi-cured state on a coil 100 220 is coated and coated with an insulating material 200, and the adjacent coils 100 coated with the insulating material 200 are wound in contact with each other, and then wound on the insulating material 200 of the coils 100. The heat-resistant high-strength insulating material 200 is adhered to the coil 100 by applying heat shielding and integrally formed, and the insulating material of the transformer is formed so that neighboring coils 100 are integrally formed with the insulating material 200 interposed therebetween. The insulating material 200 of the present invention is characterized in that the epoxy resin portion 220 coated at a thickness of 0.01 to 0.02 mm on the front and rear surfaces is formed at equal intervals, and 110 to 130 degrees Celsius. Surface of the coil 100 by the second order of It is adhered to, the epoxy resin portion 220 of the insulating material 200 of the neighboring coil 100 is integrally adhesive molded, and the present invention is also enamel varnish is applied to the coil 100 of the medium and small high-voltage copper wire In the forming method of the coil to which the insulating material of the transformer is adhered to the coil 100 so that the coils 100 are insulated by the insulating material 200, the insulating material 200 in which the epoxy resin part 220 is molded to a predetermined thickness on the coil 100. ) And then the arc surfaces 110 of the copper wires of the coil 100 are softened by curing the epoxy resin of the insulating material 200 by heating the insulating material 200 to approximately 110 ° C. to 130 ° C. Characterized in the method of forming a coil in which the insulating material of the transformer is adhesively fixed by the epoxy resin portion 220 of the insulating material 200, the present invention is also characterized in that of the coil 100 to which the insulating material 200 of the transformer Molded by molding method The insulating material of the transformer to obtain a pressure-sensitive adhesive coil.

Description

Coil to which the insulating material of a transformer is adhered, and its shaping | molding method {The method of coil for adhesive insulating paper of transformer}

The present invention relates to a coil in which an insulating material of a transformer is attached to a coil of an insulating material coated on a core of a thin plate unit, and a molding method thereof. More specifically, a magnetic circuit of a yoke core is formed on upper and lower parts. The insulating material is wound and coated with a semi-cured epoxy resin coated coil in the coil to be formed by coating the coil arranged concentrically on the core arm, and the coil is coated with the insulating material. As the secondary heat is applied, a heat-resistant high-strength insulating material adheres to the coil and may be integrally formed, and the present invention is coated with an insulating material coated with the epoxy resin part so that the epoxy resin part of the mutual insulating material with the neighboring coil is secondary. It is glued together by heat to form a unit without generating voids or pores, and power is supplied to the coil. The present invention relates to a coil to which an insulating material of a transformer is attached, and a method of forming the same, which can minimize shaking and vibration of the coil even when it is overloaded.

In general, transformers are used for converting and distributing electrical energy. Power transformers typically allow the exchange of electrical energy between two or more power systems of the same frequency at different voltages. Transformers belong to a relatively easy-to-understand group of electrical devices when talking about their basic form of operation. Electromagnetic induction is used to convert energy between power systems.

Conventional power transformers have a transformer core, which is usually formed of silicon iron and formed into a thin plate, as will be described later.

As shown in Figs. 1 to 4, a coil-type power transformer is shown. This is a three-phase transformer, but three-phase core arms (1, 2, 3) composed of a thin plate of silicon iron are provided. Yoke cores 4 and 5 are provided on the upper and lower portions of the arms 1, 2 and 3 to form magnetic circuits.

In addition, around the core arms 1, 2, 3, a low pressure coil 6 of the primary coil and a cylinder 8 around the low pressure coil 6, and also the cylinder 8 The high pressure coil 7 of the secondary coil is wound around the outer circumference of the coil. In addition, the low pressure coil 6 and the high pressure coil 7 are arranged concentrically.

In addition, to dissipate heat generated by losses in the core arms 1, 2, 3 and coils 6, 7, and also to prevent contact between the high voltage part and the outside, and also to reduce external magnetic fields. For this purpose, the insulating spacers 10 are mounted on each other and the outer circumference of the low pressure coil 6, the cylinder 8, and the high pressure coil 7. A ground wire, not shown, is provided.

In addition, the coil has a large volume predominantly subject to the high field strengths occurring in and around the transformer. It is also important to establish such an environment that does not alter or reduce the insulating properties to predetermine the dielectric stresses dimensioned to minimize the risk of breakdown.

Thus, the individual coils in the transformer must be mechanically dimensioned to withstand any stress arising as a result of the current generated during the short circuit process and the resulting current forces. In general, the coils are designed such that the forces that are generated are absorbed in each individual coil.

Furthermore, in one coil and in part between the coils and the other metal parts, the closest to the individual conductor element is solid cellulose base insulation or solid varnish base insulation and the other part is solid cellulose and liquid insulation, It is common for insulation systems to be designed to enable gas insulation.

As shown in Fig. 5, in the insulation to the coils 6 and 7, the presently used method is to wind the insulation paper 9 twice to 10 times on the coils 6 and 7 of the copper wire, and then apply varnish to the coil. do.

In addition, the low pressure coil 6 and the high pressure coils 7 are arranged concentrically and manufactured in a cylindrical shape, as shown in FIGS. 1 to 4, spacers 10 are mounted between the coils 6 and 7. In addition, the spacers 10 of the anti-shake neck are installed at various positions of the cylindrical upper and lower portions.

Therefore, when power is supplied to the coils 6 and 7 of the transformer, the vibrations (vibration) of the coils 6 and 7 are generated and noise is generated. At this time, shaking is more severe when overload is applied, and gas is generated by continuous shaking, which is fatal to burnout of transformer.

In order to prevent this, as the spacers of the varnish impregnation or the coil anti-shake neck are excessively installed, a lot of time is required for assembly work and productivity cannot be increased, and the excessive use of the spacers increases the manufacturing cost. Overuse of varnishes is also a problem for the environment.

In addition, since the coil of the medium and small high voltage copper wire has a small current, a copper wire (PEW) coated with enamel varnish is used instead of the insulating paper. As shown in FIG. 6, a low pressure coil and a high pressure coil (hereinafter, referred to as a coil) 100) is wound on top of the common insulating paper 9, so that the contact cross-sectional area of the coil is insulated from the insulating paper 9 by the point contact between the common insulating paper 9 and the coil 100. When the power is supplied and the coil shakes (vibrates), the coil 100 flows from the insulating paper 9 to cause burnout of the transformer as described above.

The present invention is to solve the above problems, the insulating material in winding and coating the insulating material of the copper wire low voltage coil and the high pressure coil is made of an insulating material in which the glass cloth is coated with an epoxy resin and semi-cured, and coils After winding and coating the insulating material on the object, a secondary heat is applied to the insulating material to form a heat-resistant high-strength insulating material in the coil.

In addition, the present invention is an insulating material is integrally adhesive-molded on the surface of the coil by heating of approximately 110 ℃ to 130 ℃ in a state in which the insulating material of the semi-cured epoxy resin is formed and wound on the coil coated on both sides of the insulating material. As the coil is wound and coated with the insulating material of a neighboring coil, the coil is integrally formed with the insulating material of the neighboring coils. As the coils are formed as a single body, there is no shaking (vibration) even when power is supplied to the coils. It is intended to be minimized so that the burnout of the transformer can be prevented.

In addition, the present invention is to install a spacer so that the oil can be circulated in order to cool the heat generated in the coil of the transformer, the epoxy resin portion is formed by coating the insulating material coated and coiled coil, and also the insulation of the coil coated Since the epoxy resin portion of the insulating material of both coils is formed in the formation of the spacer of the insulating material between the coil and the coil by the formation of the epoxy resin portion therebetween, the general insulating paper is formed without the need to use a spacer coated with an adhesive on the spacer. Even if both coils are integrally maintained with the insulating material, the purpose of the manufacturing cost can be reduced by the use of the general insulating paper.

In the present invention, in the case of the coil of the medium and small high-voltage copper wire, the copper wire coated with enamel varnish is coated with an insulating material formed by a certain thickness of epoxy resin, thereby heating the insulating material to about 110 ° C to 130 ° C. After the epoxy resin portion of the insulating material is softened by the hardening, the arc surface of the copper wires of the coil is hardened to the epoxy resin portion of the insulating material as it is hardened, so that the coils are stably maintained without shaking the insulating material.

The present invention relates to a method of forming a coil in which an insulating material of a transformer is adhered to a coil arranged in a concentric manner on a core arm concentrically formed on a core arm in which a magnetic circuit of a yoke core is formed on one phase and a lower part. The epoxy resin portion of the state is coated and coated with an insulating material, and neighboring coils coated with the insulating material are wound in a state of contact with each other, and then heat-resistant high-strength insulating material is adhered to the coils by applying secondary heat to the insulating materials of the coils. There is a basic feature in the method of forming a coil in which the coil is integrally molded and the coils of neighboring coils are integrally molded with the insulating material interposed therebetween.

In addition, the insulating material of the present invention is formed on the front and back surface of the epoxy resin coated with a thickness of 0.01 ~ 0.02mm at equal intervals, and adhered to the surface of the coil by the secondary heat of 110 ℃ to 130 ℃, the neighboring coil The epoxy resin parts of the insulating materials are integrally molded by pressure.

In addition, the present invention is a method of forming a coil in which the insulating material of the transformer is adhered to the coil of the medium and small high-voltage copper wire, the enamel varnish is applied and the coils are insulated with an insulating material, the epoxy resin portion to a constant thickness After being coated with a molded insulating material, the epoxy resin portion of the insulating material softens and hardens by heating the insulating material to approximately 110 ° C. to 130 ° C. so that the arc surfaces of the copper wires of the coil are fixed by the epoxy resin part of the insulating material. It is characterized by a method of forming a coil to which an insulating material is adhered.

In addition, the coil is coated with the insulating material of the transformer molded by the method of forming the coil to which the insulating material of the transformer is attached.

As described above, the present invention is an insulating material coated with the epoxy resin of the semi-cured state in the coil in the insulating coil is wound around the coil arranged concentrically on the core arm, the magnetic circuit of the yoke core is formed in the upper and lower parts After winding and coating the insulating material on the coil, and applying a secondary heat to the insulating material, the heat-resistant high-strength insulating material may be adhered to the coil to be integrally formed, and the present invention may be formed by coating the epoxy resin part. The insulating material is coated and the epoxy resin portion of the mutual insulating material with the neighboring coils is integrally bonded by the second row to form a unit without the occurrence of voids or pores, so that even if the coil is supplied with power and overloaded, Shake and vibration can be minimized.

1 is a front view of a coil-type power transformer,
2 is a side view of a coil-type power transformer;
3 is a longitudinal sectional view of a coil-type power transformer;
4 is a plan view of a coil-type power transformer,
5 is a perspective view of an example of coating of insulating paper on a coil of a conventional copper wire;
6 is a cross-sectional view of a mounting example of an insulating material in a coil of a conventional medium and small high voltage side copper wire;
7 is a perspective view of an example of coating of insulating paper on a coil of a copper wire of the present invention;
8 and 9 are enlarged longitudinal cross-sectional view of the coil to which the insulating material of the transformer of the present invention is adhered;
10 is a cross-sectional view of the mounting example of the insulating material in the coil of the medium and small high-voltage copper wire of the present invention;
11 is a block diagram of a method for forming a coil to which the insulating material of the transformer of the present invention is attached;
12 is a block diagram of another example of a method of forming a coil to which an insulating material of a transformer of the present invention is attached;

Detailed examples of the present invention will be described below with reference to the accompanying drawings.

1 is a front view of a coil-type power transformer, FIG. 2 is a side view of a coil-type power transformer, FIG. 3 is a longitudinal cross-sectional view of the coil-type power transformer, and FIG. 4 is a coil-type power transformer. Fig. 5 is a perspective view of an example of coating of insulating paper on a coil of a conventional copper wire, and Fig. 6 is a cross-sectional view of a mounting example of an insulating material on a coil of a conventional medium and small high voltage side copper wire. 8 and 9 are enlarged longitudinal cross-sectional views of the coil to which the insulation material of the transformer of the present invention is attached, and FIG. 10 is a cross-sectional view of the medium and small high voltage copper wire of the present invention. Fig. 11 is a block diagram of a method of forming a coil to which the insulation of the transformer of the present invention is adhered, and Fig. 12 is a view of a method of forming a coil to which the insulating material of the transformer of the present invention is adhered. It is another block diagram.

In the first embodiment of the present invention, a transformer is formed so that an insulating material is wound around a coil arranged concentrically on core arms 1, 2, and 3 in which magnetic circuits of the yoke cores 4 and 5 are formed in upper and lower parts. As shown in FIG. 7 in the method of forming a coil to which the insulating material is attached, the coil 100 is wound and coated with the insulating material 200 coated with the epoxy resin portion 220 in a semi-cured state, and further, FIGS. 8 and FIG. As shown in FIG. 9, the neighboring coils 100 coated with the insulating material 200 are wound in contact with each other, and then a secondary heat is applied to the insulating material 200 of the coils 100 to the coil 100. The heat resistant high-strength insulating material 200 is adhered and integrally formed, and neighboring coils 100 are integrally formed with the insulating material 200 interposed therebetween (see FIG. 11).

In addition, the second embodiment of the present invention is a method of forming a coil in which an insulating material of a transformer is applied so that an enamel varnish is applied to the coil 100 of a medium and small high voltage side copper wire and the coils are insulated with an insulating material. After the epoxy resin portion 220 is coated on the coil 100 by the insulating material 200 formed to a predetermined thickness, the epoxy resin portion of the insulating material 200 is heated to about 110 ° C. to 130 ° C. to the insulating material. As 220 softens and hardens, the arc surfaces 110 of the copper wires of the coil 100 are fixed by the epoxy resin portion 220 of the insulating material 200 as shown in FIG. 10 (see FIG. 12).

My Example 1

It demonstrates with reference to FIG. 7, FIG. 8, FIG. 9, and FIG.

As shown in FIG. 7, the insulating material 200 coated with the epoxy resin 220 in a semi-cured state is wound on the coil 100.

The insulating material 200 is composed of an epoxy resin 220 is arranged by coating a semi-cured epoxy resin on the glass cloth 210 at equal intervals, the epoxy resin 220 is a square on the glass fabric 210 It is coated with a thickness of 0.01 to 0.02 mm. The epoxy resin portion 220 in the semi-cured state is softened at approximately 110 ℃ to 130 ℃. The epoxy resin part 220 is formed on the front and rear surfaces of the glass fabric 210 of the insulating material 200.

Next, as the coil 100 coated with the insulating material 200 is wound to be arranged concentrically, neighboring coils 100 maintain contact with the insulating materials 200 interposed therebetween.

In addition, in the above state, secondary heat is applied to the insulating materials 200 of the coils 100 at about 110 ° C to 130 ° C. By this heating, the epoxy resin portion 220 in the semi-cured state of the insulating material 200 is softened.

The secondary heat means that the glass cloth 210 at the time of molding the insulating material 200 is heated by applying heat to the glass cloth 210 and the epoxy resin 220 at the time of molding the epoxy resin 220. Resin portion 220 is to maintain the semi-cured state in the glass cloth 210, and as described above refers to the heat applied to soften the epoxy resin portion 220.

In the softening of the epoxy resin 220, the epoxy resin is adhered to the coil 100 and the glass fabric 210 of the insulating material 200 integrally, and the epoxy resin is cured by a room temperature or a cooling device, and eventually the coil ( 100 and the insulating material 200 are molded into a single body.

Furthermore, since the heat is applied while the neighboring coils 100 are in contact with the insulating materials 200 interposed therebetween, the epoxy water of the neighboring insulating materials 200 as shown in FIGS. 8 and 9. Branches 220 are softened to stick to each other of the insulating material 200, and the epoxy resin is cured to form the coil 100 and also the insulating material 200 of the coils 100 in a single body.

Therefore, as the coils 100 are molded into a single body, even when power is supplied to the coils 100, there is no shaking (vibration) and the shaking is minimized even when an overload is applied, thereby preventing the transformer from being burned out.

In addition, the spacer 10 is installed so that the oil can be circulated to cool the heat generated from the coil 100 of the transformer, and the insulating material 200 to which the epoxy resin 220 is formed and adhered is coil 100. The spacer 10 of the insulating material 200 is formed between the coil 100 and the coil 100 by forming an epoxy resin portion 220 between the coils that are wound and coated and coated with the insulating material 200. Since the epoxy resin portion 220 of the insulating material 200 of both coils 100 in the box is formed, both coils may be formed even if the general insulating paper is formed without using the spacer 10 coated with an adhesive on the spacer 10. Bonding 100 is maintained integrally with the insulating material 200.

Therefore, by adhering to the conventional coil by the adhesive bond using a common insulating material, it is possible to prevent the fatal effect on the burnout of the transformer by the generation of gas by the release of moisture contained in the adhesive bond, and also between the coils The workability of mounting the spacer can be improved.

In addition, in the insulation between earth and coil, and between high voltage and low voltage, a spacer of about 0.8t to 3.2t thick insulation material is used as insulation capable of withstanding the severe electrical conditions of the transformer. Glue so that it does not disturb. At this time, after the coil is penetrated into the spacer of thick insulating material and the coil winding is completed, it is always dried, but the coil is wound to pass the moisture content test (doble test) because it is not 100% dried. Labor costs and drying costs are incurred as the spacers of the insulated material are dried and used. However, in the present invention, there is no need to perform a separate drying operation, thereby greatly reducing the cost.

My 2 Example

It demonstrates with reference to FIG. 10 and FIG.

The enamel varnish is applied to the coil 100 of the medium and small high voltage side copper wire.

In addition, the insulating material 200 is provided, but the epoxy resin portion 220 in a semi-cured state is formed on the insulating material 200 to approximately 1 mm to 2 mm.

After the coil 100 is covered by the insulating material 200, the coil 100 is heated to about 110 ° C. to 130 ° C.

As a result, the epoxy resin portion of the insulating material 200 is softened by the heat. As the softening and curing are performed, the arc surfaces 110 of the copper wires of the coil 100 are epoxy water of the insulating material 200 as shown in FIG. 10. It is adhesively fixed by the branch 220.

The arc surfaces 110 of the copper wires of the coil 100 are cured in the epoxy resin portion 220 of the insulating material 200 so that the coils 100 are stably maintained without shaking the insulating material 200.

Therefore, according to the present invention, the conventional insulating paper 9 and the coil 100 are coiled on the insulating paper 9 by point contact because the conventional insulating paper 9 is wound on the common insulating paper 9 as shown in FIG. As the contact cross-sectional area of is small, when the coil is powered and the coil is shaken (vibrated), the coil 100 may flow from the insulating paper 9 to solve the problem of causing a burnout of the transformer.

1,2,3: core arm 4,5: yoke core
6: low pressure coil 7: high pressure coil
8 cylinder 9: insulating paper
10: spacer 100: coil
110: surface 200: insulating material
210: glass cloth 220: epoxy resin

Claims (5)

In the method of forming a coil in which the insulating material of the transformer is adhered so that the insulating material is wound and coated on a coil arranged concentrically on the core arm where the magnetic circuit of the yoke core is formed on the upper and lower parts.
After winding the insulating material 200 coated with the epoxy resin part 220 in a semi-cured state to the coil 100 and winding the neighboring coils 100 coated with the insulating material 200 in contact with each other, As the secondary heat is applied to the insulating materials 200 of the coils 100, a heat-resistant high-strength insulating material 200 is adhered to the coil 100 and integrally formed, and neighboring coils 100 interpose the insulating material 200. The molding method of the coil to which the insulation of the transformer is attached, characterized in that the molding is integrally placed. The method according to claim 1, wherein the insulating material 200 is formed on the front and rear, the epoxy resin portion 220 coated with a thickness of 0.01 ~ 0.02mm at equal intervals, the coil 100 by a second row of 110 ℃ to 130 ℃ Bonding to the surface of the, the molding method of the coil is insulated of the insulating material of the transformer, characterized in that the epoxy resin portion 220 of the insulating material (200) of the neighboring coil 100 is integrally molded. In the method of forming a coil in which an insulating material of a transformer is applied so that an enamel varnish is applied to the coil 100 of the medium and small high-voltage copper wire, and the coils 100 are insulated with the insulating material 200.
After the epoxy resin portion 220 is coated on the coil 100 by the insulating material 200 formed to a predetermined thickness, the insulating material 200 is heated to about 110 to 130 ° C. to the insulating material 200. As the epoxy resin softens and hardens, the arc surfaces 110 of the copper wires of the coil 100 are adhesively fixed by the epoxy resin 220 of the insulating material 200. . Coil to which the insulating material of the transformer adhered by the molding method of the coil 100 to which the insulating material 200 of the transformer of claim 1 or 2 is attached. Coil to which the insulating material of the transformer is adhered by the molding method of the coil 100 to which the insulating material of the transformer 200 is attached.
KR1020100030818A 2010-04-05 2010-04-05 The method of coil for adhesive insulating paper of transformer KR20110111643A (en)

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Application Number Priority Date Filing Date Title
KR1020100030818A KR20110111643A (en) 2010-04-05 2010-04-05 The method of coil for adhesive insulating paper of transformer

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Application Number Priority Date Filing Date Title
KR1020100030818A KR20110111643A (en) 2010-04-05 2010-04-05 The method of coil for adhesive insulating paper of transformer

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KR20110111643A true KR20110111643A (en) 2011-10-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104882258A (en) * 2015-06-26 2015-09-02 镇江天力变压器有限公司 Epoxy pouring dry-type transformer cushion block structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104882258A (en) * 2015-06-26 2015-09-02 镇江天力变压器有限公司 Epoxy pouring dry-type transformer cushion block structure

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