EP2479764A2 - Harzgeformte Spule und geformter Transformator damit - Google Patents

Harzgeformte Spule und geformter Transformator damit Download PDF

Info

Publication number
EP2479764A2
EP2479764A2 EP12151409A EP12151409A EP2479764A2 EP 2479764 A2 EP2479764 A2 EP 2479764A2 EP 12151409 A EP12151409 A EP 12151409A EP 12151409 A EP12151409 A EP 12151409A EP 2479764 A2 EP2479764 A2 EP 2479764A2
Authority
EP
European Patent Office
Prior art keywords
layer
resin
glass base
resin molded
molded coil
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP12151409A
Other languages
English (en)
French (fr)
Other versions
EP2479764B1 (de
EP2479764A3 (de
Inventor
Tatsuhito Azegami
Masaki Takeuchi
Kohei Sato
Atsushi Suzuki
Yoshimitsu Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Industrial Equipment Systems Co Ltd
Original Assignee
Hitachi Industrial Equipment Systems Co Ltd
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 Hitachi Industrial Equipment Systems Co Ltd filed Critical Hitachi Industrial Equipment Systems Co Ltd
Publication of EP2479764A2 publication Critical patent/EP2479764A2/de
Publication of EP2479764A3 publication Critical patent/EP2479764A3/de
Application granted granted Critical
Publication of EP2479764B1 publication Critical patent/EP2479764B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers
    • 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
    • H01F27/327—Encapsulating or impregnating
    • 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
    • H01F27/327—Encapsulating or impregnating
    • H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases

Definitions

  • the present invention relates to a technology for providing a molded transformer for power receiving and distribution.
  • Patent Document 1 JP-A-2000-12343
  • Patent Document 2 JP-A-11-214237
  • Patent Document 1 and Patent Document 2 given above describe the provision of a manufacturing method of a resin molded coil wherein the resin molded layer is formed in a method easier than that of the prior art and the insulation characteristics are good.
  • thermoset resin such as epoxy resin
  • the radially inner/outer circumference of the concentric of the coil is configured by only the resin layer or by one fiber glass base-material layer impregnated with resin and one resin layer to ensure the insulation characteristics as described above.
  • the resin contraction amount increases in the resin layer at resin curing time or transformer operation time and, when the resin contraction amount exceeds the allowable stress, it is anticipated that a crack will appear.
  • the present invention provides many embodiments that may address the problems described above.
  • An example is given below.
  • a resin molded coil is configured by providing multiple layers of a prepreg layer and a fiber glass-base layer in the inner/outer circumference resin layers in the radial direction of the concentric circle of a coil and a winding wire to make the resin layer multiply-layered and subdivided. This configuration reduces the resin contraction amount of each layer and increases crack resistance.
  • a resin molded coil comprises an inner circumference side resin layer and an outer circumference side resin layer in the radial direction of a winding wire wherein the inner circumference side resin layer or the outer circumference side resin layer has a plurality of layers of glass base-material.
  • the resin molded coil is configured in such a way that a prepreg layer is provided on the inner circumference side of the inner circumference side resin layer and a glass base-material layer is provided on the outer circumference side of the prepreg layer.
  • the resin molded coil is configured in such a way that, from the inner circumference side to the outer circumference side in the radial direction of the winding wire, a first prepreg layer, a first glass base-material layer, a second prepreg layer, a second glass base-material layer, the winding wire, a third glass base-material layer, a third prepreg layer, a fourth glass base-material layer, and a fourth prepreg layer are provided.
  • the resin molded coil further comprises a resin layer on the top and the bottom of the glass base-material layers in the axial direction of the winding wire.
  • the resin molded coil is configured in such a way that the glass base-material is made of fiber.
  • the resin molded coil is configured in such a way that the resin layer on the top and the bottom has a fiber glass base-material.
  • a molded transformer for power receiving and distribution comprises the resin molded coil; an iron core where the resin molded coil is provided; a connecting terminal to which the resin molded coil is connected; and a metal fitting for securing the resin molded coil.
  • the present invention increases the crack resistance of the resin layer and the workability of wire winding as compared to the conventional method and provides a molded transformer superior in dielectric strength and productivity.
  • the following describes the configuration of the resin layer on the radially inner circumference side and outer circumference side of the molded coil winding wire of a resin molded coil.
  • FIG. 1 is a diagram showing an example of the cross section when a resin molded coil in this embodiment is viewed from the side.
  • the resin molded coil in this embodiment has a winding wire 1 that acts as a coil, a molded resin layer 2, a glass base-material layer, and a prepreg layer.
  • the resin molded coil is configured by the following components from the inner circumference side to the outer circumference side of the coil: first prepreg layer 41, first glass base-material layer 31, second prepreg layer 42, second glass base-material layer 32, winding wire 1, third glass base-material layer 33, third prepreg layer 43, fourth glass base-material layer 34, and fourth prepreg layer 44.
  • the molded resin layer 2 is formed by filling and curing resin on and under the first prepreg layer 41, first glass base-material layer 31, second prepreg layer 42, second glass base-material layer 32, winding wire 1, third glass base-material layer 33, third prepreg layer 43, fourth glass base-material layer 34, and fourth prepreg layer 44.
  • the structure of the conventional resin molded coil requires that the prepreg tape be wound multiple times to attain the thickness of the prepreg layer on the inner circumference side to increase crack resistance. This winding work requires a long time and therefore decreases the productivity.
  • the resin layer is configured by winding the prepreg tape in one turn to form a prepreg layer on the inner circumference side to provide the first prepreg layer 41.
  • the first glass base-material layer 31 is provided on the first prepreg layer 41.
  • the first glass base-material layer 31 is provided in this way to increase crack resistance.
  • the winding work time becomes shorter than that in the conventional winding work in which the prepreg tape is wound multiple turns, thus improving productivity as compared to the conventional method.
  • the molded resin layer 2 is formed by filling and curing resin on and under the prepreg layer, which includes the winding wire 1, first prepreg layer 41, second prepreg layer 42, third prepreg layer 43, and fourth prepreg layer 44, and the glass base-material layer which includes the first glass base-material layer 31, second glass base-material layer 32, third glass base-material layer 33, and fourth glass base-material layer 34.
  • the number of turns of the prepreg tape is not limited to one but may be wound any number of turns as long as the winding work time can be reduced as compared to the conventional method. This means that the prepreg tape may be wound twice or three times.
  • the following describes the configuration of the top and bottom of the resin layers of a resin molded coil.
  • FIG. 2 is a diagram showing an example of the cross section of a resin molded coil in a second embodiment.
  • the molded resin layer 2 is altered.
  • a fiber glass base-material 5 is provided in the molded resin layer 2 at the end of the insulators such as the glass base-material layer and the prepreg layer to cover the end of the insulators such as the glass base-material layer and the prepreg layer.
  • the molded resin layer 2 is formed by filling and curing resin on and under the glass base-material layer and the prepreg layer.
  • insulators such as an inter-layer insulating film or a glass cloth, for example, TEONEX(R) and LUMIRROR X10S(R), may also be provided.
  • FIG. 3 is a sectional view showing an example of forming the resin layer of the resin molded coil 100, exemplified in FIG. 1 and FIG. 2 , using resin.
  • the first prepreg layer 41, first glass base-material layer 31, second prepreg layer 42, and second glass base-material layer 32 on the inner circumference side of the resin molded coil 100 is formed as a resin layer 40A using resin
  • the third glass base-material layer 33, third prepreg layer 43, fourth glass base-material layer 34, and fourth prepreg layer 44 on the outer circumference side is formed as a resin layer 40B using resin.
  • the resin molded coil 100 has the resin layers, each of which is a layer of resin, in such a way that the resin layer 40A is positioned on the inner circumference side of the winding wire 1 and the resin layer 40B is positioned on the outer circumference side as exemplified in FIG. 3 .
  • the sectional shape of the resin molded coil 100 is not limited to circle, but may be quadrilateral.
  • FIG. 4 shows the outline perspective view of a power receiving/distribution molded transformer in which the resin molded coils 100 are provided.
  • the power receiving/distribution molded transformer shown in FIG. 4 comprises an iron core 10, a primary coil provided around the iron core 10 to generate an alternating field, a secondary coil provided between the iron core 10 and the primary coil, a primary terminal 13 provided outside the transformer as the connecting terminal of the primary coil, a secondary terminal 14 provided outside the transformer as the connecting terminal of the secondary coil, and metal fittings 11 and 12 of the transformer.
  • An air space which functions as an insulator and a cooler, is provided between the primary coil and the secondary coil.
  • the metal fittings 11 and 12 comprise the top metal fitting and the bottom metal fitting that secure the iron core 10 and the coil from above and below.
  • the primary coil may be configured by divided coils, and resin is cast and cured to configure a resin molded coil.
  • the wire winding method of the divided coils described above is not used for the secondary coil, and a molded coil, formed by winding coil on the metal mold, casting and curing resin, and then removing the metal mold, may be installed.
  • the bobbin is made of resin, and a glass roving cloth base-material is used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP12151409.5A 2011-01-21 2012-01-17 Harzgeformte Spule und geformter Transformator damit Not-in-force EP2479764B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011010366A JP5663322B2 (ja) 2011-01-21 2011-01-21 樹脂モールドコイル、及びそれを用いたモールド変圧器

Publications (3)

Publication Number Publication Date
EP2479764A2 true EP2479764A2 (de) 2012-07-25
EP2479764A3 EP2479764A3 (de) 2012-08-22
EP2479764B1 EP2479764B1 (de) 2014-04-30

Family

ID=45554494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12151409.5A Not-in-force EP2479764B1 (de) 2011-01-21 2012-01-17 Harzgeformte Spule und geformter Transformator damit

Country Status (3)

Country Link
EP (1) EP2479764B1 (de)
JP (1) JP5663322B2 (de)
CN (1) CN102610383B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108292560B (zh) * 2015-08-21 2019-11-19 东芝产业机器系统株式会社 模压线圈

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11214237A (ja) 1998-01-22 1999-08-06 Hitachi Ltd 樹脂モールドコイルの製造方法
JP2000012343A (ja) 1998-06-17 2000-01-14 Hitachi Ltd 樹脂モールドコイル及びその製造方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5515268A (en) * 1978-07-19 1980-02-02 Matsushita Electric Ind Co Ltd Manufacturing method of mold coil
JPS5662311A (en) * 1979-10-29 1981-05-28 Hitachi Ltd Mold coil
JPS5681907A (en) * 1979-12-06 1981-07-04 Toshiba Corp Resin mold coil
JPS6015305Y2 (ja) * 1980-01-24 1985-05-14 株式会社東芝 乾式変圧器巻線
JPS58202506A (ja) * 1982-05-21 1983-11-25 Toshiba Corp 樹脂モ−ルドコイル
JPS6053007A (ja) * 1983-09-02 1985-03-26 Toshiba Corp 樹脂モ−ルドコイルの製造方法
JPS6059724A (ja) * 1983-09-13 1985-04-06 Toshiba Corp 樹脂モ−ルドコイルの製造方法
JPS61177702A (ja) * 1985-02-01 1986-08-09 Mitsubishi Electric Corp モ−ルドコイル
JPH03107307A (ja) * 1989-09-20 1991-05-07 Hitachi Ltd 磁気浮上式鉄道用地上コイル
JPH02256211A (ja) * 1990-02-14 1990-10-17 Aichi Electric Co Ltd 樹脂モールドコイルの製造方法
JP3093301B2 (ja) * 1991-03-06 2000-10-03 株式会社東芝 樹脂モールドコイルとその製造方法
JPH09213540A (ja) * 1996-02-05 1997-08-15 Toshiba Corp モールド電器コイル及びその製造方法
JP2001267147A (ja) * 2000-03-23 2001-09-28 Matsushita Electric Ind Co Ltd 電気機器
JP2003059731A (ja) * 2001-08-21 2003-02-28 Hitachi Ltd モールドコイルとその製造方法及びモールド変圧器とその製造方法
DE102009047147A1 (de) * 2008-12-03 2010-09-02 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Kobe Elektromagnetrohrexpandierinduktor und Verfahren zum Herstellen desselben
JP5267240B2 (ja) * 2009-03-16 2013-08-21 住友電気工業株式会社 リアクトル、及びコンバータ
EP2463870A1 (de) * 2010-12-10 2012-06-13 ABB Research Ltd. Trockenwandler mit Hitzerohr in der Hochspannungswickelung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11214237A (ja) 1998-01-22 1999-08-06 Hitachi Ltd 樹脂モールドコイルの製造方法
JP2000012343A (ja) 1998-06-17 2000-01-14 Hitachi Ltd 樹脂モールドコイル及びその製造方法

Also Published As

Publication number Publication date
CN102610383A (zh) 2012-07-25
JP2012151374A (ja) 2012-08-09
CN102610383B (zh) 2015-11-04
EP2479764B1 (de) 2014-04-30
JP5663322B2 (ja) 2015-02-04
EP2479764A3 (de) 2012-08-22

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