KR20170028500A - Mold transformer - Google Patents

Mold transformer Download PDF

Info

Publication number
KR20170028500A
KR20170028500A KR1020150124955A KR20150124955A KR20170028500A KR 20170028500 A KR20170028500 A KR 20170028500A KR 1020150124955 A KR1020150124955 A KR 1020150124955A KR 20150124955 A KR20150124955 A KR 20150124955A KR 20170028500 A KR20170028500 A KR 20170028500A
Authority
KR
South Korea
Prior art keywords
voltage winding
low
mold transformer
winding
insulating paper
Prior art date
Application number
KR1020150124955A
Other languages
Korean (ko)
Other versions
KR102018873B1 (en
Inventor
정상훈
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020150124955A priority Critical patent/KR102018873B1/en
Publication of KR20170028500A publication Critical patent/KR20170028500A/en
Application granted granted Critical
Publication of KR102018873B1 publication Critical patent/KR102018873B1/en

Links

Images

Classifications

    • 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
    • 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

Landscapes

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

Abstract

Disclosed is a mold transformer including: an iron core; a low-voltage winding wound around the iron core; a high-voltage winding wound around the low-voltage winding and placed apart from the low-voltage winding by a main insulation interval; a cylindrical barrier provided within the main insulation interval; a glass net provided inside the high-voltage winding; a high-voltage insulating paper covering inner surfaces of the high-voltage winding and the glass net; and a low-voltage insulating paper covering an outer surface of the low- voltage winding, wherein the cylindrical barrier is biased toward the low-voltage winding from the center of the main insulation interval. According to the mold transformer, the insulation performance is ensured and the mold transformer is miniaturized.

Description

Mold transformer {MOLD TRANSFORMER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold transformer, and more particularly, to a mold transformer having an improved insulation structure between a high-voltage winding and a low-voltage winding.

The mold transformer is a solid insulation type transformer that encloses the windings with epoxy resin. It is mixed with an inorganic filler such as silica in epoxy resin or contains basic material such as glass fiber to prevent environmental pollution, It is widely used because it has the advantage of minimizing the risk of occurrence.

1 is a cross-sectional view of a conventional mold transformer.

1, the mold transformer includes an iron core 10, a low-voltage winding 20 provided to surround the iron core 10, and a low-voltage winding 20 which is spaced apart from the low- A high voltage winding 30 provided to surround the high voltage winding 20, a cylindrical barrier 40 provided at the main insulation distance d, a glass net 50 provided inside the high voltage winding 30, A low pressure side insulating paper 70 provided so as to cover the outer surface of the low pressure winding 20, a high pressure side insulating paper 60 provided to cover the high pressure winding 30 and the inner surface of the glass net 50, And epoxy resin (25, 35) surrounding the low-voltage winding (20) and the high-voltage winding (30).

Here, in the conventional mold transformer, the cylindrical barriers 40 are disposed at the center of the main insulation interval d, and the glass net 50 covers the inside surfaces of the high-voltage windings 30, As the high-pressure side insulating paper 60 and the low-pressure side insulating paper 70, a F type insulating material obtained by bonding a 100% polyester nonwoven fabric to both sides of a polyester film is used.

On the other hand, in the mold transformer having such a configuration, if the main insulation distance d is reduced, not only the diameter of the winding wire but also the height of the iron core 10 and the winding wire can be reduced.

However, the mold transformer according to the conventional technique shown in Fig. 1 has a problem in that the main insulation distance d is reduced due to the limitation of the insulating structure of the cylindrical barrier 40, the structure of the glass net 50, The insulation performance is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve at least some of the problems of the prior art as described above, and it is an object of the present invention to provide a mold transformer with a reduced main insulation interval.

According to an aspect of the present invention, there is provided an arc welding apparatus including an iron core, a low-voltage winding wound around the iron core, a high-voltage coil wound around the low- A glass net provided on an inner surface of the high voltage winding; a high voltage side insulating paper provided so as to cover an inner surface of the high voltage winding and the glass net; A mold transformer comprising a low-pressure side insulating paper provided so as to cover an outer surface of a winding, wherein the cylindrical barrier is disposed on one side from the center of the main insulating gap to the low-voltage winding side.

In one embodiment, the cylindrical barriers may be unilaterally disposed from the center of the main insulation gap to the low-voltage winding side by 5% of the main insulation interval.

Further, in one embodiment, the glass net may be configured such that the uppermost end is positioned lower than the uppermost end of the high-voltage winding.

Further, in one embodiment, the high-pressure-side insulating paper may be formed of a film in which a darkron and a film are laminated in multiple layers.

For example, the high-voltage side insulating paper may be provided in one layer inside the high-voltage winding.

According to the embodiment of the present invention having such a configuration, it is possible to obtain an effect that the insulation performance is secured and the device is miniaturized.

1 is a partial cross-sectional view of a mold transformer according to the prior art.
2 is a partial cross-sectional view of a mold transformer according to an embodiment of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

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

Referring to FIG. 2, a mold transformer according to an embodiment of the present invention will be described.

2, the mold transformer 100 according to an embodiment of the present invention includes an iron core 110, a low-voltage winding 120 that surrounds the iron core 110, a low-voltage winding 120 A high voltage winding 130 disposed to surround the low voltage winding 120 by a main insulation distance d and a cylindrical barrier 140 provided at the main insulation interval d, Pressure insulating sheet 160 and the low-voltage winding 120, which are provided to cover the high-voltage winding 130 and the inner surface of the glass net 150, and a glass net 150 provided on the inner surface of the low- A low pressure side insulation paper 170 provided to cover the outer side surface and epoxy resins 125 and 135 surrounding the high voltage winding 130 and the low voltage winding 120.

Here, in the mold transformer 100 according to an embodiment of the present invention, the cylindrical barriers 140 may be disposed on one side from the center of the main insulation interval d to the low voltage winding 120 side.

As described above, the structure in which the cylindrical barriers 140 are disposed on one side toward the low-voltage winding 120 can increase the insulation distance between the high-voltage winding 130 and the low-voltage winding 120.

That is, in the structure in which the cylindrical barrier 140 is disposed on the side of the low-voltage winding 120, the difference in height between the high-voltage winding 130 and the cylindrical barrier 140 is smaller than the height difference between the low-voltage winding 120 and the cylindrical barrier 140 The shortest distance from the upper end of the high voltage winding 130 to the upper end of the low voltage winding 120 over the cylindrical barrier 140 can be increased compared with the structure of the conventional mold transformer.

For example, the cylindrical barriers 140 may be disposed on one side from the center of the main insulation gap d to the low voltage winding 120 side by 5% of the linear distance of the main insulation distance d, but not limited thereto, It can be designed to be placed at an appropriate position according to the specification of the winding and the insulation performance of the insulation.

The mold transformer according to the conventional technique shown in FIG. 1 is provided so that the glass net 150 covers the entire upper end of the high-voltage winding 130. Alternatively, the mold transformer 100 according to an embodiment of the present invention May be configured such that the top of the glass net (150) is positioned lower than the top of the high voltage winding (130). Here, the glass net 150 is a network structure made of glass fiber. The glass net 150 is provided on the inner side of the high-voltage winding 130 to reinforce the rigidity of the high-voltage winding 130.

For example, the glass net 150 may be configured such that its upper end is positioned 5 mm lower from the uppermost end of the high-voltage winding 130, but is not limited thereto.

In addition, in one embodiment of the present invention, the high-pressure-side insulating paper 160 may be formed of a film in which a darkron and a film are laminated in multiple layers.

The film obtained by multiple-layer bonding of the film with Darkron has a good mechanical strength and is advantageous in keeping the round shape and has excellent withstand voltage.

For example, the conventional high-pressure side insulating paper 160 is thin and thin, so that it is applied to a product in which multiple layers are wound, thereby increasing the risk of void formation (air layer), which is a main cause of insulation breakdown in the manufacturing process. On the other hand, in the present invention, it is possible to minimize the risk of forming a void (air layer) by providing a film in which multiple layers of a film and a darkron having the same thickness as a plurality of layers of high-

The high-pressure side insulating paper 160 made of a film in which the dark rubber and the film are laminated in multiple layers has a high-pressure side insulating paper 160 made of F-type insulating material in which a 100% polyester nonwoven fabric is adhered to both sides of the polyester film in a conventional mold transformer, It is possible to alleviate the electric field concentration at the edge portion of the end portion of the winding by dispersing the electric field generated in the winding.

Meanwhile, in one embodiment, the low-pressure side insulating paper 170 may be made of F-type insulating material obtained by bonding a 100% polyester nonwoven fabric to both sides of a polyester film like a conventional mold transformer, but is not limited thereto.

The mold transformer 100 according to an embodiment of the present invention as described above can be manufactured by a conventional technology such as the arrangement of the cylindrical barriers 140, the arrangement of the glass net 150, and the material of the high- And the main insulation distance d can be reduced while having the same or higher insulation performance than the mold transformer according to the present invention.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

<Mold Transformer by Conventional Technique>
10: iron core 20: low pressure winding
25: Low-pressure winding side epoxy resin 30: High-voltage winding
35: High-voltage winding side epoxy resin 40: Cylindrical barrier
50: Glass net 60: High pressure side insulating paper
70: Low pressure side insulating paper
<Mold Transformer According to an Embodiment of the Present Invention>
100: mold transformer 110: iron core
120: Low pressure winding 125: Low pressure winding side epoxy resin
130: high-voltage winding 135: high-voltage winding side epoxy resin
140: Cylindrical barrier 150: Glass net
160: High-pressure side insulating paper 170: Low-pressure side insulating paper

Claims (5)

A low voltage winding wound around the iron core; a high voltage winding wound around the low voltage winding to be spaced apart from the low voltage winding by a main insulation interval; a cylindrical barrier provided at the main insulation interval; A glass net provided on an inner surface of the winding, a high-voltage side insulating paper provided so as to cover the high-voltage winding and the inner surface of the glass net, and a low-pressure side insulating paper provided so as to cover the outer surface of the low- In this case,
Wherein the cylindrical barrier is disposed on one side from the center of the main insulation gap to the low-voltage winding side.
The method according to claim 1,
Wherein the cylindrical barrier is disposed on one side from the center of the main insulation gap to the low-voltage winding side by 5% of the main insulation interval.
The method according to claim 1,
Wherein the glass net has a top end positioned lower than a top end of the high voltage winding.
The method according to claim 1,
Wherein the high-pressure-side insulating paper comprises a film obtained by bonding a plurality of layers of a film and a darkron.
5. The method of claim 4,
And the high-pressure-side insulating paper is provided in one layer inside the high-voltage winding.
KR1020150124955A 2015-09-03 2015-09-03 Mold transformer KR102018873B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150124955A KR102018873B1 (en) 2015-09-03 2015-09-03 Mold transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150124955A KR102018873B1 (en) 2015-09-03 2015-09-03 Mold transformer

Publications (2)

Publication Number Publication Date
KR20170028500A true KR20170028500A (en) 2017-03-14
KR102018873B1 KR102018873B1 (en) 2019-09-09

Family

ID=58459988

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150124955A KR102018873B1 (en) 2015-09-03 2015-09-03 Mold transformer

Country Status (1)

Country Link
KR (1) KR102018873B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108010692A (en) * 2018-01-24 2018-05-08 江苏源通电气有限公司 A kind of dry-type power transformer with high insulating property
US11511508B2 (en) * 2020-06-07 2022-11-29 Liaoning Xingqi Electric Material Limited Liability Company Process of manufacturing thickened angle ring

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0794344A (en) * 1993-09-20 1995-04-07 Nissin Electric Co Ltd Transformer
KR200412216Y1 (en) * 2005-12-19 2006-03-23 보성파워텍 주식회사 insulated conductor for transformer
EP2075806A1 (en) * 2007-12-27 2009-07-01 Elettromeccanica di Marnate S.p.A. Dry-type resin-insulated transformer with shielded side-by-side primary windings
JP2009206254A (en) * 2008-02-27 2009-09-10 Tokuden Co Ltd Abutment type dry transformer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0794344A (en) * 1993-09-20 1995-04-07 Nissin Electric Co Ltd Transformer
KR200412216Y1 (en) * 2005-12-19 2006-03-23 보성파워텍 주식회사 insulated conductor for transformer
EP2075806A1 (en) * 2007-12-27 2009-07-01 Elettromeccanica di Marnate S.p.A. Dry-type resin-insulated transformer with shielded side-by-side primary windings
JP2009206254A (en) * 2008-02-27 2009-09-10 Tokuden Co Ltd Abutment type dry transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108010692A (en) * 2018-01-24 2018-05-08 江苏源通电气有限公司 A kind of dry-type power transformer with high insulating property
US11511508B2 (en) * 2020-06-07 2022-11-29 Liaoning Xingqi Electric Material Limited Liability Company Process of manufacturing thickened angle ring

Also Published As

Publication number Publication date
KR102018873B1 (en) 2019-09-09

Similar Documents

Publication Publication Date Title
KR101254155B1 (en) Winding arrangement for a transformer or for a reactor
JP2006156702A (en) Transformer
KR20210021578A (en) Coil core and transformer
US12119152B2 (en) Laminated coil
KR20170028500A (en) Mold transformer
KR101596399B1 (en) iron core winding assembly for transformer
JP6147600B2 (en) Litz wire
JP2018181976A (en) Transformer, and transformer bobbin
KR20160081493A (en) A core for transformer
KR102618677B1 (en) Transformer containing windings
JP2013055279A (en) Stationary induction apparatus
JP5177231B2 (en) Transformer used for arc welding machine and assembly method of transformer used for arc welding machine
JP6397504B2 (en) Transformer and high voltage generator
JP2013162009A (en) Mold transformer
US20150123758A1 (en) Transformer with force absorbing electrical insulation
JP5663322B2 (en) Resin molded coil and molded transformer using the same
JP5885898B1 (en) Stationary induction equipment
US20190304668A1 (en) High-voltage coil, transformer and method for manufacturing high-voltage coil
CN204792344U (en) Toroidal transformer iron core
US20220230791A1 (en) Magnetic element
JP4930809B2 (en) Trance
JP6696400B2 (en) Coil bobbin and horizontal transformer device
JP2011249699A (en) Magnetic core device and coil device using the same
JP6748032B2 (en) Stationary inductor
KR20170143379A (en) Shunt reactor

Legal Events

Date Code Title Description
N231 Notification of change of applicant
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right