WO2016117216A1 - 絶縁電線及びそれを用いたコイル並びに絶縁電線の製造方法 - Google Patents

絶縁電線及びそれを用いたコイル並びに絶縁電線の製造方法 Download PDF

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Publication number
WO2016117216A1
WO2016117216A1 PCT/JP2015/082260 JP2015082260W WO2016117216A1 WO 2016117216 A1 WO2016117216 A1 WO 2016117216A1 JP 2015082260 W JP2015082260 W JP 2015082260W WO 2016117216 A1 WO2016117216 A1 WO 2016117216A1
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WIPO (PCT)
Prior art keywords
wire
coil
compound film
compound
insulated wire
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Application number
PCT/JP2015/082260
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English (en)
French (fr)
Japanese (ja)
Inventor
昇平 駒村
賢治 宮澤
正宏 柳原
正平 宮原
勝夫 羽生
Original Assignee
東京特殊電線株式会社
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Application filed by 東京特殊電線株式会社 filed Critical 東京特殊電線株式会社
Priority to CN201580011394.3A priority Critical patent/CN106062891B/zh
Publication of WO2016117216A1 publication Critical patent/WO2016117216A1/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect

Definitions

  • the present invention relates to an insulated wire, a coil using the insulated wire, and an insulated wire manufacturing method. More specifically, the present invention is used for a power transformer coil, a switching power coil, and the like, and is capable of realizing a reduction in the size of the coil and an improvement in the space factor at low cost, a coil using the same, and an insulated wire. It relates to a manufacturing method.
  • litz wires obtained by twisting a plurality of insulation-coated copper wires, insulated wires that are further coated with the litz wires, and the like are used.
  • each strand to be twisted is insulated with an enamel film or the like for the purpose of suppressing an increase in AC resistance due to the skin effect in a high frequency region of several tens of kHz to several hundreds of kHz.
  • Patent Document 1 proposes a litz wire that can improve electrical characteristics in a high-frequency region.
  • a solderable ultraviolet curable resin layer is provided outside the twisted enamel wires.
  • the enamel film thickness can be made thinner and the finished outer diameter can be made smaller than before.
  • Patent Document 2 proposes a new litz wire that has an excellent space factor and can reduce partial discharge and electromagnetic vibration degradation.
  • seven enameled wires with enamel insulation coating on a conductor are twisted and passed through a circular die, rolled to an extent that does not damage the enameled wire, and the outer diameter is compressed. The layer is obtained by coating and baking.
  • soldering is generally performed. However, depending on the type of enamel paint, it can be soldered as it is, or the surface film of the strand is removed by chemicals or machining. And then soldering. In addition, in an insulated wire in which a litz wire is further covered with insulation, soldering may be performed after removing the insulation coating with a stripper or the like, or after removing the surface coating.
  • the technique proposed in Patent Document 1 is to thinly coat the outer side of the litz wire with an ultraviolet curable resin.
  • the technique proposed in Patent Document 2 is a rolled enameled wire.
  • the insulating film provided on each strand has a thickness of about several ⁇ m.
  • a conductor diameter of 0.3 mm ⁇ type 2 polyurethane enameled wire described in Patent Document 1 has a film thickness of 10 ⁇ m to 18 ⁇ m. If there are three types of polyurethane enameled wires with a conductor diameter of 0.3 mm ⁇ described in Patent Document 1, the film thickness is about 7 to 13 ⁇ m.
  • the finished outer diameter greatly affects the enamel film thickness of the strands constituting the litz wire. Will be.
  • a coil using such a litz wire has a low space factor corresponding to the thickness of the enamel film.
  • the “2 types” and “3 types” referred to here are based on “JIS (Japanese Industrial Standards) C 3202” (corresponding Western standards are “IEC 60317” (Europe) and “NEMA MW1000C”). (U.S.).)
  • the above-mentioned litz wire is obtained by twisting a plurality of enameled wires with enamel coating applied to each of the strands by repeatedly applying enamel and drying at high temperature, resulting in many manufacturing processes, resulting in Compared to a single-wire insulated wire or the like, it was significantly more expensive.
  • the present invention has been made to solve the above problems. Its purpose is used for power transformer coils, switching power coils, etc., and it is possible to realize miniaturization of coils and improvement of space factor, and further to use insulated wires that can be easily soldered.
  • An object of the present invention is to provide a low-cost method for manufacturing an insulated wire while providing a coil at low cost.
  • An insulated wire according to the present invention for solving the above-mentioned problems is an insulated wire for closely winding and forming a coil, and forms a complex with the constituent metal of the strand and the metal. It has a compound film-coated strand coated with a compound film formed from a compound, and an insulating layer coated on the outer periphery of a stranded wire obtained by twisting a plurality of the compound film-coated strands.
  • the thickness of the coated compound film is as follows because the compound film-coated element wire is coated with a compound film formed from a constituent metal of the element wire and a compound that forms a complex with the metal.
  • the outer diameter of the insulated wire formed by covering the outer periphery of the stranded wire formed by twisting the compound film-covered strands that are thin and coated with the compound film can be reduced.
  • this insulated wire it is possible to reduce the size of the coil and increase the occupation ratio of the insulated wire per unit volume.
  • the compound film can be formed by bringing the compound solution and the wire into contact with each other and drying, it can be formed with a simpler apparatus compared to the conventional enamel film, and it is extremely efficient in a short time. Thus, a stranded wire can be produced. For this reason, the insulated wire using it can be provided at low cost.
  • the compound film is preferably an imidazole compound film that forms a complex with the constituent metal.
  • the compound film is preferably made of a material that decomposes at a soldering temperature.
  • the insulating layer is an insulating coating film, an insulating extruded resin, or an insulating tape.
  • a coil according to the present invention for solving the above problems is formed by using the insulated wire according to the present invention.
  • the insulated wire having the compound film-coated wire covered with the thin compound film since the insulated wire having the compound film-coated wire covered with the thin compound film is used, the outer diameter of the insulated wire can be reduced and the coil can be downsized. In addition, the occupation ratio of the insulated wires per unit volume can be increased.
  • the coil according to the present invention can be configured for a power transformer.
  • a method of manufacturing an insulated wire according to the present invention for solving the above-described problem is a method of manufacturing an insulated wire for closely winding and forming a coil, A solution of a compound that forms a complex with a constituent metal of the element wire and the element wire are contacted and dried, and a compound film-coated element wire is formed with a compound film formed from the metal and the compound, Create a twisted wire by twisting a plurality of the compound film coated strands, An insulating layer is formed on the outer periphery of the stranded wire.
  • the thickness of the coated compound film is as follows because it has the compound film coated element wire coated with the compound film formed by forming a complex with the constituent metal of the element wire.
  • the outer diameter of the insulated wire formed by covering the outer periphery of the stranded wire formed by twisting the compound film-covered strands that are thin and coated with the compound film can be reduced. Also, soldering can be easily performed during terminal processing. Moreover, an insulated wire can be provided at low cost.
  • the coil since the coil (electronic component) is configured using the above-described insulated wire, the coil can be reduced in size at a low cost, and the occupation rate of the insulated wire per unit volume can be increased. Can be increased.
  • FIG. 1 It is a section lineblock diagram showing an example of an insulated wire concerning the present invention. It is explanatory drawing of the insulated wire of FIG. It is a cross-sectional block diagram (A) (B) which shows the example of the electronic component which concerns on this invention.
  • an insulated wire according to the present invention a coil using the insulated wire, and a method for producing the insulated wire will be described with reference to the drawings.
  • the present invention is not limited to the illustrated embodiment.
  • the insulated wire 10 is used for a power transformer coil, a switching power coil, and the like, and can realize downsizing of the coil and improvement of the space factor at low cost.
  • the insulated wire 10 is an insulated wire that is wound closely to form a coil. As shown in FIGS. 1 and 2, the constituent metal of the strand 1, the constituent metal and the complex are combined. A compound film-coated strand 3 coated with a compound film 2 formed from the compound to be formed, and an insulating layer 5 coated on the outer periphery of a stranded wire 4 in which a plurality of the compound film-coated strands 3 are twisted together Have.
  • this insulated wire 10 the thickness of the compound film 2 is reduced in nature, and the outer diameter of the obtained insulated wire 10 can be reduced. As a result, by using this insulated wire 10, it is possible to reduce the size of the coil at a low cost and to increase the occupation ratio of the insulated wire 10 per unit volume.
  • the insulating layer 5 is a single layer or a stacked layer, it may be collectively referred to as an “insulating layer 5”.
  • the strand 1 is a conductor constituting the stranded wire 4.
  • the conductive conductor is preferably a solderable conductive conductor.
  • the material of the strand 1 may be copper or a copper alloy, aluminum or an aluminum alloy, a composite material such as copper clad aluminum, or a plating material obtained by plating them with another metal.
  • the wire itself may be solderable, or when the conductor itself cannot be soldered, it may be solderable by plating or the like.
  • solderable metal provided by plating or the like, tin, solder, nickel, gold, silver, copper, palladium, or one or more alloys thereof can be given.
  • the diameter of the strand 1 is not specifically limited, For example, it can be set as 0.03 mm or more and about 0.5 mm or less. Such a strand 1 can be obtained by hot working or cold working a base material having an arbitrary thickness.
  • the compound film 2 is a film of a compound formed by forming a complex with the metal constituting the strand 1, and is provided on the outer periphery of the strand 1. Such a compound may be a compound having a property of forming a complex with the constituent metal of the wire 1.
  • the compound film 2 is thin as described later, its resistance value is not as high as that of the conventional enamel film, but the increase in AC resistance in the high frequency region of several tens to several hundreds kHz is A result almost equivalent to that of a conventional wire with an enamel coating can be obtained.
  • Examples of the compound include imidazole and amine organic acid salt. Especially, the imidazole shown in following Chemical formula 1 can be mentioned preferably. This imidazole can be obtained from commercially available products. When imidazole reacts with, for example, copper constituting the strand 1, a copper imidazole complex represented by the following chemical formulas 2 and 3 is formed.
  • the compound film 2 is an imidazole film formed with such a copper imidazole complex.
  • the compound film 2 is a layer obtained by reacting, for example, copper with a compound constituting the element wire 1, and the thickness is preferably 0.01 ⁇ m or more and 0.5 ⁇ m or less. Since the compound film 2 is provided with a thickness within this range, oxidation of the wire 1 can be prevented and solder wettability can be improved. Furthermore, it can contribute to reducing the diameter of the final insulated wire 10. Further, since the compound film 2 is not as thick as a conventional enamel film, there is an extremely small amount of burnt residue at the time of soldering, and there is an advantage that problems caused by the burnt residue at the solder connection portion hardly occur.
  • enamel films with low heat resistance such as urethane
  • solder debris is generated and attached as solder foreign matter, which may cause poor connection. there were.
  • an insulating layer 5 described later is coated on the outer periphery of the stranded wire 4 obtained by twisting the compound film-covered element wires 3 coated with the thin compound film 2.
  • the outer diameter of the electric wire 10 can be reduced.
  • the compound film 2 is preferably composed of a material that decomposes at the soldering temperature.
  • the soldering temperature at this time is any temperature within the range of 200 ° C. to 450 ° C. Since both the above-mentioned imidazole and amine organic acid salt are decomposed at the soldering temperature, the terminal treatment by soldering can be performed during the final terminal treatment.
  • the formation of the compound film 2 can be performed by bringing the compound solution and the wire 1 into contact with each other and drying.
  • the strand 1 may be immersed in the compound solution, or the compound solution may be applied or sprayed onto the strand 1. Drying is performed to remove a solvent (for example, water or an organic solvent) constituting the compound solution.
  • a solvent for example, water or an organic solvent
  • the stranded wire 4 can be formed very efficiently in a short time by forming it with a simpler device as compared with the conventional enamel film. Can be produced. For this reason, the insulated wire 10 using the same can be provided at low cost.
  • the stranded wire 4 is formed by twisting a plurality of compound film-coated strands 3 coated with the compound film 2. Examples of twisting include collective twisting and concentric twisting, and the outer diameter may be further reduced by compressing the twisted wire.
  • the twist pitch and the like are arbitrarily set and are not particularly limited. Further, the number of the compound film-coated strands 3 is not particularly limited, and is arbitrarily set according to required product specifications and coil specifications.
  • the insulating layer 5 is coated on the outer periphery of the stranded wire 4 and is preferably, for example, an insulating coating film, an insulating extruded resin, or an insulating tape.
  • the insulating layer 5 may be made of a material that decomposes at the soldering temperature. In that case, the terminal treatment can be performed by soldering.
  • Examples of the constituent material of the insulating layer 5 include various resins constituting the insulated wire.
  • examples of the resin that can form a solderable insulating layer include thermosetting resins such as polyurethane resin, polyester resin, and polyesterimide resin. Of these, polyurethane resins and polyester resins are preferred.
  • polyphenyl sulfide PPS
  • EFE ethylene-tetrafluoroethylene copolymer
  • FEP tetrafluoroethylene-hexafluoropropylene copolymer
  • fluorinated resin Copolymer perfluoroalkoxy fluororesin: PFA
  • PEEK polyether ether ketone
  • PET polyethylene terephthalate
  • PA polyamide
  • PPS polyphenyl sulfide
  • FEP tetrafluoroethylene-hexafluoropropylene copolymer
  • the insulating layer 5 may be a single layer or a laminated layer as long as it is an insulating coating film, an insulating extruded resin, or an insulating tape.
  • the insulating layer 5 is formed in a laminated form, two or more of the same or different thermosetting resin layers described above may be provided, or a thermoplastic resin layer may be laminated on the thermosetting resin layer. Further, the thermoplastic resin layer may be laminated by combining tape winding and extrusion.
  • the composition in the case where the insulating layer 5 is formed of a thermosetting resin material includes a crosslinking agent and a solvent in addition to the thermosetting resin material. Moreover, various additives are contained as needed. Those crosslinking agents, solvents and additives are not particularly limited.
  • the insulating layer 5 is formed by applying a forming composition, wound by tape, or formed by extrusion.
  • the thickness of the insulating layer 5 is not particularly limited regardless of whether it is a single layer or a stacked layer, but is usually preferably 20 ⁇ m or more. If the thickness of the insulating layer 5 is less than 20 ⁇ m, it may be too thin to ensure sufficient insulation.
  • the electronic component 20 according to the present invention is a coil formed by using the above-described insulated wire 10 according to the present invention. Since the electronic component 20 uses the insulated wire 10 having a small outer diameter, it is possible to reduce the size of the coil and increase the occupation ratio of the insulated wire per unit volume.
  • FIG. 3 is a cross-sectional view of the coil (electronic component 20).
  • A is sectional drawing when the insulated wire 10 which concerns on this invention is closely wound around the bobbin 21, and was wound.
  • (B) is sectional drawing when the conventional insulated wire 22 with a large outer diameter is wound around the bobbin 21.
  • the winding thickness a when the insulated wire 10 according to the present invention is wound is more conventional. It becomes smaller than the winding thickness b when the insulated wire 22 is wound.
  • Example 1 Twenty-one copper wires having a diameter of 0.1 mm were prepared as the strands 1.
  • Compound film coating element in which 21 strands 1 were immersed in an imidazole aqueous solution at a rate of 50 m / min for 0.3 seconds and subsequently dried at 130 ° C. to provide compound film 2 having a thickness of 0.1 ⁇ m Line 3 was formed.
  • Twenty-one compound film-coated strands 3 were twisted at a pitch of 18 mm as they were to produce a strand 4 having a diameter of about 0.53 mm.
  • As the imidazole aqueous solution an aqueous solution containing 5% by mass of imidazole, 10% by mass of acetic acid and 0.5% by mass of other additives was used.
  • Example 2 In Example 1, 21 strands 1 were dipped in an imidazole aqueous solution at a rate of 10 m / min for 1.5 seconds and subsequently dried at 130 ° C. to provide a compound film 2 having a thickness of 0.5 ⁇ m. The compound film-coated strand 3 was formed. Others were carried out similarly to Example 1, and produced the stranded wire 4 and the insulated wire 10. FIG.
  • a conventional enamellitz wire was prepared. Twenty-one copper wires having a diameter of 0.1 mm were prepared as the strands 1. Each of the 21 strands 1 is enamel-baked by repeating enamel coating and heat drying at 360 ° C. five times by a conventional method to form a compound film-coated strand 3 provided with an enamel layer having a thickness of 3 ⁇ m. Rolled up respectively. Thereafter, the compound film-coated strand 3 was fed out from 21 bobbins and twisted at a pitch of 18 mm to produce a litz wire having a diameter of about 0.56 mm.
  • the enamel coating material used was a polyurethane resin paint (trade name: TPU F2-NC, manufactured by Tohoku Paint Co., Ltd.) diluted with a solvent.
  • Soldering was evaluated using the stranded wire 4 and litz wire produced in Example 1, Example 2 and Comparative Example 1.
  • Soldering is a molten solder whose length is set to 300 ° C., 350 ° C., 370 ° C., 400 ° C., and 430 ° C. at a length of 10 mm from one end of the stranded wire 4 and litz wire (Solder type: Senju Metal Industry Co., Ltd.) Manufactured, trade name: M31, composition: Sn-3.5Ag-0.75Cu) until contact with the solder, and the time was measured.
  • the contact was performed by a moving dipping method that moves up and down in a molten solder bath.
  • the insulated wire 10 of Example 1 and Example 2 was about 0.70 mm in diameter.
  • the insulated wire 22 of Comparative Example 1 had a diameter of about 0.73 mm.
  • the insulated wire 10 of Example 1 and Example 2 can reduce the diameter by 4% compared to the insulated wire 22 of Comparative Example 1 having the same AC resistance in the high frequency region.

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  • Insulated Conductors (AREA)
  • Coils Of Transformers For General Uses (AREA)
PCT/JP2015/082260 2015-01-19 2015-11-17 絶縁電線及びそれを用いたコイル並びに絶縁電線の製造方法 WO2016117216A1 (ja)

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CN201580011394.3A CN106062891B (zh) 2015-01-19 2015-11-17 绝缘电线和使用其的线圈以及绝缘电线的制造方法

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JP2015007852A JP5805336B1 (ja) 2015-01-19 2015-01-19 絶縁電線及びそれを用いたコイル並びに絶縁電線の製造方法
JP2015-007852 2015-01-19

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ES2736074A1 (es) * 2018-06-21 2019-12-23 Bsh Electrodomesticos Espana Sa Dispositivo de aparato de cocción por inducción
WO2023210058A1 (ja) * 2022-04-28 2023-11-02 株式会社Totoku 絶縁電線及びそれを用いたコイル並びに絶縁電線の製造方法

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JP7050566B2 (ja) * 2017-05-02 2022-04-08 古河電気工業株式会社 高周波用高出力トランス
CN107300531A (zh) * 2017-07-01 2017-10-27 中国科学院兰州化学物理研究所 一种咪唑类离子液体中n‑甲基咪唑含量的检测方法
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JP7123578B2 (ja) * 2018-03-08 2022-08-23 東京特殊電線株式会社 高周波コイル用絶縁電線
KR102483591B1 (ko) * 2018-04-25 2023-01-03 다이킨 고교 가부시키가이샤 꼬인 전선 및 그 제조 방법
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JP7302443B2 (ja) * 2019-11-11 2023-07-04 株式会社デンソー 回転電機
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WO2021176668A1 (ja) 2020-03-05 2021-09-10 株式会社デンソー 回転電機

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Publication number Priority date Publication date Assignee Title
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WO2023210058A1 (ja) * 2022-04-28 2023-11-02 株式会社Totoku 絶縁電線及びそれを用いたコイル並びに絶縁電線の製造方法

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CN106062891A (zh) 2016-10-26
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CN106062891B (zh) 2017-09-19
TW201612920A (en) 2016-04-01
JP5805336B1 (ja) 2015-11-04

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