WO2017033554A1 - Bobine moulée - Google Patents

Bobine moulée Download PDF

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Publication number
WO2017033554A1
WO2017033554A1 PCT/JP2016/068674 JP2016068674W WO2017033554A1 WO 2017033554 A1 WO2017033554 A1 WO 2017033554A1 JP 2016068674 W JP2016068674 W JP 2016068674W WO 2017033554 A1 WO2017033554 A1 WO 2017033554A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding conductor
conductor layer
coil
mold
support
Prior art date
Application number
PCT/JP2016/068674
Other languages
English (en)
Japanese (ja)
Inventor
裕介 陦
正治 久保田
Original Assignee
東芝産業機器システム株式会社
株式会社 東芝
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 東芝産業機器システム株式会社, 株式会社 東芝 filed Critical 東芝産業機器システム株式会社
Priority to JP2017536651A priority Critical patent/JP6833696B2/ja
Priority to CN201680047582.6A priority patent/CN108292560B/zh
Publication of WO2017033554A1 publication Critical patent/WO2017033554A1/fr

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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
    • H01F27/08—Cooling; Ventilating
    • 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
    • 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
    • H01F30/10—Single-phase transformers
    • 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

Definitions

  • Embodiment of this invention is related with the mold coil used for a static mold apparatus.
  • each section of the mold coil is divided into section coils so that cooling air passes inside the mold coil.
  • a duct is provided between them to cool the mold coil and insulate the section coils.
  • This duct is configured, for example, by placing a corrugated support between each section coil. The end face of the support is usually arranged so as to align with the end face of the section coil.
  • an object of the embodiment of the present invention is to provide a molded coil excellent in creeping insulation performance, air layer insulation performance, and cooling performance.
  • the molded coil according to the present embodiment has a winding conductor layer, a plurality of cylindrical section coils whose surroundings are covered with a resin mold are provided concentrically, and a support is interposed between the section coils. With a duct configured. The position of the end portion of the support is present at a position retreated from the end surface of the resin mold and the end portion of the winding conductor layer.
  • Partially perspective sectional view showing a schematic configuration example of a molded coil according to the first embodiment Partially perspective sectional view showing a schematic configuration example of a molded coil according to the second embodiment
  • FIG. 1 is a partial perspective sectional view showing a schematic configuration example of a molded coil 10 according to the first embodiment.
  • the molded coil 10 is formed such that a plurality of cylindrical section coils 10a are stacked concentrically.
  • a direction orthogonal to the radial direction of the molded coil 10 is referred to as an axial direction, and the axial direction is expressed as a vertical direction.
  • the winding conductor 12 has a configuration in which a winding conductor layer 12d and a crossover 12c are formed from the winding conductor inlet 12a of the molded coil 10 and connected to the winding conductor outlet 12b. These winding conductor layers 12d are U-connected by a jumper 12c.
  • the winding conductor layer 12 d is covered with an insulating material, and constitutes a resin mold 18.
  • the resin mold 18 including the winding conductor layer 12d is formed as follows.
  • the winding conductor layer 12d is covered with a nonwoven fabric or the like, and the support 16 is disposed so as to provide a predetermined space between the winding conductor layers 12d.
  • an epoxy resin is impregnated and then cured.
  • the resin mold 18 having the winding conductor layer 12d therein is formed. That is, the section coil 10a is configured such that the winding conductor 12 (winding conductor layer 12d) wound in a cylindrical shape is covered with an insulator (for example, epoxy resin).
  • the support 16 is, for example, a corrugated resin structure.
  • a duct 14 having a passage extending in the axial direction of the molded coil 10 is formed between the section coils 10a by interposing the support 16 between the adjacent section coils 10a.
  • the support 16 is made of, for example, an epoxy resin, and therefore the support 16 has a high dielectric constant.
  • the passage through which air flows is formed by the duct 14, and the mold coil 10 can be cooled by the air flowing through the passage.
  • the distance between the section coils 10 a is defined by the support 16.
  • the distance between the section coils 10a is manufactured in consideration of creeping insulation performance, cooling performance, and air layer insulation performance between the section coils 10a.
  • the edge part of the support body 16 is called the support body end surface 16a.
  • a crossover wire 12c is provided between the winding conductor layers 12d of the section coil 10a, and these have a U connection, that is, a shape in which U shapes are joined in a staggered manner in the cross section, and the periphery thereof is covered with the resin mold 18. It is configured as follows. Here, the end of the winding conductor layer 12d on the opposite side as viewed from the side to which the connecting wire 12c is connected is referred to as a winding conductor layer end 12e. These winding conductor layers 12d, the crossover wires 12c, and the resin mold 18 are integrated to form the molded coil 10.
  • the position of the support end surface 16a of the support 16 is the internal direction of the mold coil 10 structure (section) from the resin mold end surface 18a.
  • the coil 10a exists in a position retracted by the retracting length L1 in the axial direction.
  • the position of the support end surface 16a exists at a position retracted inward from the winding conductor layer end 12e.
  • the end insulating portion 20 indicates from the resin mold end surface 18a to the winding conductor layer end portion 12e of the resin mold 18, and the end insulating portion length from the resin mold end surface 18a toward the inside of the molded coil 10 structure.
  • the winding conductor layer end 12e exists at a distance L2.
  • L2 "relationship.
  • End insulating portions 20 are provided on the upper and lower portions of the molded coil 10 so as to be connected to the winding conductor layer 12d.
  • the mold coil 10 (section coil 10a) has a resin mold end surface 18a.
  • the resin mold 18 has a resin mold corner 18b at the corner of the resin mold end surface 18a.
  • the resin mold corner 18b is a place where the electric field related to the mold coil 10 is concentrated. If an electrical path such as the support end surface 16a exists in the vicinity of the resin mold corner 18b, a discharge is generated through this. It becomes easy.
  • the winding conductor 12 has a winding conductor corner 12f at the winding conductor layer end 12e.
  • the winding conductor corner portion 12f is a place where the electric field tends to concentrate.
  • an electrical surface such as the support end surface 16a. If there is a path, electric discharge tends to occur through the path.
  • the positions of the support end surface 16a of the support 16 exists at a position retracted from the resin mold end surface 18a. That is, the support end surface 16a and the resin mold end surface 18a do not form the same plane. For this reason, since the resin mold corner 18b where the electric field concentration occurs and the support end surface 16a are not close to each other, bridging between the section coils 10a is suppressed, and deterioration of the creeping insulation performance of the end surface of the section coil 10a can be suppressed. it can. Thereby, in the lightning impulse test, it is possible to suppress the occurrence of distortion exceeding the standard of the lightning impulse waveform starting from creeping dielectric breakdown between the section coils 10a.
  • the position of the support end surface 16a of the support 16 is configured to be present at a position retracted inward from the end surface of the section coil 10a (that is, the resin mold end surface 18a) and the winding conductor layer end portion 12e. Yes. That is, the support end surface 16a exists at a position retracted inward from the resin mold end surface 18a by a distance equal to or longer than the receding length L1. As a result, the support end surface 16a is not close to the resin mold corner 18b but also not to the strong electric field 18c on the surface of the resin mold 18 nearest to the winding conductor corner 12f where the electric field is concentrated.
  • the voltage shared by the air layer of the duct 14 is increased due to the presence of the support 16 having a high dielectric constant.
  • the position of the support end surface 16a is positioned at the resin mold. It is comprised so that it may become a position retreated from the end surface 18a. Thereby, the partial discharge performance in the resin mold corner 18b can be improved.
  • the cooling area of the mold coil 10 can be increased, and the pressure loss of the air passing through the duct 14 can be reduced. Thereby, the cooling performance of the mold coil 10 can be improved.
  • FIG. 2 is a partial perspective sectional view showing a schematic configuration example of the molded coil 10 according to the second embodiment.
  • one section coil 10a and the support 16 are extracted and shown.
  • the tape-type nonwoven fabric 22, the end nonwoven fabric 24, and the clip 26 are shown so that the state before the molded coil 10 is impregnated with resin and integrated can be understood.
  • the molded coil 10 is arranged so that the end nonwoven fabric 24 is connected to the upper end portion of the winding conductor 12 wound in a cylindrical shape, that is, the winding conductor layer 12d, and these are wound together with the tape-type nonwoven fabric 22 and gathered together. It is fixed to. Furthermore, in order to prevent the wound tape-type nonwoven fabric 22 from unwinding and collapsing the assembled shape, the end nonwoven fabric 24 and the tape-type nonwoven fabric 22 are overlapped and fixed by clips 26. . In addition, the position of the support end surface 16a of the support 16 exists at a position that is recessed inward from the resin mold end surface 18a and the winding conductor layer end 12e.
  • the end non-woven fabric 24, the tape-type non-woven fabric 22 around which the end non-woven fabric 24 is wound, and the clip 26 constitute the end insulating portion 20.
  • the support end surface 16a exists at a position retracted inward from the resin mold end surface 18a and the winding conductor layer end 12e, that is, a receding length L1 which is a distance from the resin mold end surface 18a to the support end surface 16a. Is larger than the end insulating portion length L2, as in the first embodiment.
  • the molded coil 10 is impregnated with the resin as the integral part of the winding conductor 12 and the end nonwoven fabric 24 that are wound around the tape-type nonwoven fabric 22 and sandwiched and fixed by the clip 26. Are integrally formed by curing.
  • the support 16 and the winding conductor layer 12d are alternately arranged in a concentric cylindrical shape in a mold (not shown), and the winding conductor layer 12d is wound around the tape-type nonwoven fabric 22.
  • the clip 26 is fitted to the upper and lower ends of the winding conductor layer 12d wound with the tape-type nonwoven fabric 22 to fix the tape-type nonwoven fabric 22 so as not to collapse.
  • the resin is impregnated and then cured.
  • the molded coil 10 is formed, in which the winding conductor layer 12d, the tape-type nonwoven fabric 22, and the clip 26 are integrally cured with the resin.
  • the tape-type nonwoven fabric 22 wound around the winding conductor layer 12d is fixed with the clip 26, so that the resin is impregnated and cured. Therefore, the tape-type nonwoven fabric is usually provided without a spacer disposed on the support 16. The nonwoven fabric 22 does not break and collapse.
  • the effects of the molded coil 10 according to the second embodiment are summarized as follows. According to the molded coil 10 which concerns on 2nd Embodiment, there exists an effect similar to 1st Embodiment. In addition, by adopting such a configuration, even when the support end surface 16a is disposed at a position retracted from the resin mold end surface 18a, it is possible to suppress the collapse of the assembled shape due to the unfolding of the tape-type nonwoven fabric 22. . As a result, it is possible to realize the mold coil 10 configured such that the position of the support end surface 16a exists at a position retracted from the resin mold end surface 18a.
  • FIG. 3 is a partial perspective sectional view showing a schematic configuration example of the molded coil according to the third embodiment.
  • FIG. 3 shows one section coil 10a and support 16 extracted.
  • the sheet-type nonwoven fabric 32 and the end nonwoven fabric 24 are shown so that the state before the molded coil 10 is impregnated with resin and integrated can be understood.
  • a self-supporting sheet-type non-woven fabric 32 that is not necessarily unfastened without being fixed by the clip 26 is used.
  • the molded coil 10 is arranged so that the end nonwoven fabric 24 is placed on the upper end portion of the winding conductor 12 wound in a cylindrical shape, that is, the winding conductor layer 12d, and these are wound around the sheet type nonwoven fabric 32. It is fixed to cover.
  • the sheet-type nonwoven fabric 32 has such a strength as to have a so-called waist so that the shape can be maintained by itself. Furthermore, you may clamp and fix the winding conductor layer edge part 12e, the edge part insulation part 20, and the sheet-type nonwoven fabric 32 using the clip 26 demonstrated in 2nd Embodiment.
  • the end nonwoven fabric 24 and the sheet type nonwoven fabric 32 around which the end nonwoven fabric 24 is wound constitute the end insulating portion 20.
  • the position of the support end surface 16a exists at a position retracted inward from the resin mold end surface 18a and the winding conductor layer end portion 12e, that is, a receding that is a distance from the resin mold end surface 18a to the support end surface 16a.
  • the length L1 is larger than the end insulating portion length L2, as in the first and second embodiments.
  • the molded coil 10 is integrally configured by impregnating a resin with the winding conductor 12 and the end nonwoven fabric 24 wound by the sheet-type nonwoven fabric 32 as a unit. ing.
  • the effects of the molded coil 10 according to the third embodiment are summarized as follows. According to the molded coil 10 which concerns on 3rd Embodiment, there exists an effect similar to 1st Embodiment. Further, since the winding conductor 12 is wound using the sheet-type nonwoven fabric 32 that can be self-supporting and can retain its shape, the support end surface 16a is retracted from the resin mold end surface 18a toward the inside of the mold coil 10 structure. Even if they are arranged in the same shape, the assembled shape can be maintained, so that an effect of excellent productivity is achieved.
  • FIG. 4 shows a schematic configuration of a molded transformer 100 that is a molded static induction device.
  • the mold transformer 100 includes a mold transformer content 32 constituting the content of the mold type static induction device, a sealed container 33 in which the mold transformer content 32 is stored, and an outer side surface of the sealed container 33 (left and right in the figure).
  • the heat exchanger 34 provided in the.
  • the molded transformer contents 32 are configured by combining the mold coil 10 whose surface is covered with a resin or an insulating material containing a resin and an iron core 36.
  • the molded coil 10 includes a section coil 10a mounted on the outer periphery of the iron core 36, and a section coil 10a disposed on the outer periphery of the section coil 10a.
  • the molded coil 10 is the molded coil 10 according to the first, second, or third embodiment.
  • the mold coil 10 is configured such that the position of the support end surface 16a (not shown in FIG. 4) is a position retracted from the resin mold end surface 18a.
  • the sealed container 33 air 37 having a pressure exceeding the atmospheric pressure is enclosed in a state where the contents 32 of the mold transformer are accommodated.
  • the sealed container 33 and the left and right heat exchangers 34 are connected by an upper connection path 38 and a lower connection path 39, respectively.
  • the upper connection path 38 is connected to the upper part of the sealed container 33, and the lower connection path 39 is connected to the lower part of the sealed container 33.
  • a partition plate 40 is provided in the sealed container 33 so as to be positioned above the lower connection path 39 and below the upper connection path 38.
  • the partition plate 40 is provided in a fixed state on the inner surface of the sealed container 33.
  • a circular flow hole 40 a along the outer periphery of the mold coil 10 is formed in a portion adjacent to the outer periphery of the mold coil 10.
  • the contents of the mold transformer 32 when the operation of the mold transformer 100 is started, the contents of the mold transformer 32 generate heat, and accordingly, the temperature of the air 37 in the sealed container 33 rises. As shown by arrows in FIG. 4, the air 37 whose temperature has risen rises in the sealed container 33, and then flows to the heat exchanger 34 side through the upper connection path 38 to be cooled.
  • the air 37 cooled by the heat exchanger 34 circulates so as to be returned into the sealed container 33 through the lower connection path 39.
  • the air 37 in the sealed container 33 circulates through the heat exchanger 34, whereby the air 37 in the sealed container 33 is cooled, and the mold transformer contents 32 are cooled.
  • a part of the air 37 circulating in the sealed container 33 passes through a gap between the flow hole 40a of the partition plate 40 and the outer peripheral portion of the mold coil 10 to cool the mold coil 10 from the outer peripheral portion.
  • the cooling effect can be enhanced.
  • the duct 14 is formed by the support 16 between the adjacent section coils 10a, a part of the air 37 circulating in the sealed container 33 also enters the duct 14, and the molded coil 10 is also inserted from the inside. Cooling. Thereby, the cooling effect of the mold coil 10 can be further enhanced.
  • the mold transformer contents 32 are accommodated in the sealed container 33 in which the air 37 having a pressure exceeding the atmospheric pressure is sealed, so that the section coil 10a of the mold coil 10 is It is possible to improve the withstand voltage of the air 37 involved in the insulation between the molded coil 10 and the member having a ground potential such as the iron core 36.
  • the insulation withstand voltage of the molded transformer contents 32 alone is set to the standard operating voltage (ordinary voltage) or more, and the overall withstand voltage when the air 37 having a pressure exceeding the atmospheric pressure is stored in the sealed container 33 is as follows.
  • the test voltage commercial frequency voltage, impulse voltage, etc. specified by the standard or higher shall be used.
  • the withstand voltage of the molded transformer contents 32 alone is equal to or higher than the standard operating voltage.
  • the withstand voltage when the atmospheric air 37 is stored in the sealed container 33 is equal to or higher than the standard operating voltage. The same effect can be obtained by setting as above.
  • the heat exchanger 34 for increasing the density of the air 37 in the sealed container 33 and cooling the air 37 is provided, the cooling performance can be improved.
  • a molded transformer 100 having a higher voltage and a larger capacity that exceeds the upper limit of the voltage and capacity of a conventional mold transformer that relies on air at atmospheric pressure for its insulating function and cooling function. It becomes possible.
  • the support end surface 16a of the support 16 is disposed at a position retracted inside the end surface of the section coil 10a (that is, the resin mold end surface 18a) and the winding conductor layer end 12e.
  • the cooling effect can be further improved in the retracted portion.
  • the air blowing resistance around the support 16 is lowered by the amount of the retraction, the cooling effect by the air 37 circulating between the section coils 10a can be improved.
  • section coils 10a are arranged in a plurality of layers and concentrically, the section coils 10a may be supported and overlapped by the support 16 so as to be spaced apart from each other by a concentric shape.
  • the cross section of the mold coil 10 may not be circular but may be rectangular or elliptical.
  • the support 16 for forming the duct 14 that defines the interval between the section coils 10a has been described using the support 16 having a corrugated plate in the above embodiment, it is not intended to be limited to this shape.
  • a support 16 having a rectangular wave cross section may be used, or a support 16 that is a plurality of rod-shaped spacers may be used.

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

Abstract

L'invention porte sur une bobine moulée comprenant une pluralité de bobines de section tubulaire qui comprennent des couches de conducteur d'enroulement et dont les périphéries sont recouvertes d'une résine moulée, les bobines de section tubulaire étant disposées d'une manière se chevauchant concentriquement, des conduits étant ménagés entre les bobines de section par l'intermédiaire d'un matériau de support. La position d'une extrémité du matériau de support est présente à une position en retrait par rapport à une face d'extrémité de la résine moulée et l'extrémité de la couche de conducteur d'enroulement.
PCT/JP2016/068674 2015-08-21 2016-06-23 Bobine moulée WO2017033554A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017536651A JP6833696B2 (ja) 2015-08-21 2016-06-23 モールドコイル
CN201680047582.6A CN108292560B (zh) 2015-08-21 2016-06-23 模压线圈

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-163709 2015-08-21
JP2015163709 2015-08-21

Publications (1)

Publication Number Publication Date
WO2017033554A1 true WO2017033554A1 (fr) 2017-03-02

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ID=58099847

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/068674 WO2017033554A1 (fr) 2015-08-21 2016-06-23 Bobine moulée

Country Status (3)

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JP (1) JP6833696B2 (fr)
CN (1) CN108292560B (fr)
WO (1) WO2017033554A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018195666A (ja) * 2017-05-16 2018-12-06 東芝産業機器システム株式会社 コイル、コイルの製造方法
WO2019181152A1 (fr) * 2018-03-22 2019-09-26 株式会社日立製作所 Appareil à induction stationnaire

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193760U (fr) * 1982-02-02 1982-12-08
JPH06120049A (ja) * 1992-10-09 1994-04-28 Toshiba Corp 変圧器
JPH06176939A (ja) * 1992-12-08 1994-06-24 Toshiba Corp モールドコイルおよびその組立方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5577823U (fr) * 1978-10-26 1980-05-29
JPS55133519A (en) * 1979-04-05 1980-10-17 Mitsubishi Electric Corp Formation of duct for molded coil
JPS5996812U (ja) * 1982-12-21 1984-06-30 富士電機株式会社 ガス絶縁誘導電器の巻線構造
JPS60207325A (ja) * 1984-03-31 1985-10-18 Toshiba Corp 樹脂モ−ルドコイルの製造方法
JPS60210829A (ja) * 1984-04-04 1985-10-23 Toshiba Corp 変圧器の製造方法
JP2695027B2 (ja) * 1990-02-07 1997-12-24 株式会社東芝 モールドコイル
JP5663322B2 (ja) * 2011-01-21 2015-02-04 株式会社日立産機システム 樹脂モールドコイル、及びそれを用いたモールド変圧器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193760U (fr) * 1982-02-02 1982-12-08
JPH06120049A (ja) * 1992-10-09 1994-04-28 Toshiba Corp 変圧器
JPH06176939A (ja) * 1992-12-08 1994-06-24 Toshiba Corp モールドコイルおよびその組立方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018195666A (ja) * 2017-05-16 2018-12-06 東芝産業機器システム株式会社 コイル、コイルの製造方法
WO2019181152A1 (fr) * 2018-03-22 2019-09-26 株式会社日立製作所 Appareil à induction stationnaire
JP2019169502A (ja) * 2018-03-22 2019-10-03 株式会社日立製作所 静止誘導器

Also Published As

Publication number Publication date
JP6833696B2 (ja) 2021-02-24
CN108292560A (zh) 2018-07-17
JPWO2017033554A1 (ja) 2018-07-05
CN108292560B (zh) 2019-11-19

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