WO2022001057A1 - Novel high-temperature-resistant and corona-resistant ceramic membrane covered wire - Google Patents

Novel high-temperature-resistant and corona-resistant ceramic membrane covered wire Download PDF

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WO2022001057A1
WO2022001057A1 PCT/CN2020/140867 CN2020140867W WO2022001057A1 WO 2022001057 A1 WO2022001057 A1 WO 2022001057A1 CN 2020140867 W CN2020140867 W CN 2020140867W WO 2022001057 A1 WO2022001057 A1 WO 2022001057A1
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aluminum
covered wire
novel high
corona
layer
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PCT/CN2020/140867
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French (fr)
Chinese (zh)
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雷厉
李昊旻
王晓波
李文浩
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西比里电机技术苏州有限公司
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Publication of WO2022001057A1 publication Critical patent/WO2022001057A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • 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
    • H01B7/02—Disposition of insulation
    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame

Definitions

  • the invention relates to the technical field of electromagnetic wires, and more specifically, relates to a novel high-temperature-resistant and corona-resistant ceramic film-covered wire.
  • the structure of the existing magnet wire on the market usually adopts the structure of the inner layer of conductive metal and the outer layer of insulating layer.
  • the current best magnet wire has a maximum temperature resistance of 220°C, and a long corona resistance time at 155°C. for 70 hours.
  • the corona resistance time of the existing magnet wire under high temperature needs to be improved.
  • the present invention proposes a new type of high-temperature and corona-resistant ceramic film-covered wire, which mainly includes a three-layer structure, from the inside to the outside, the outer surface is an aluminum-based conductive metal, a ceramic layer and an organic insulating layer, wherein The ceramic layer is grown in situ on the surface of the conductive metal whose outer surface is aluminum base by means of micro-arc oxidation.
  • the corona resistance time of the ceramic film covered wire with this structure can be extended to 250 hours to 330 hours at 155 °C.
  • the corona resistance time of the ceramic film covered wire required by the national standard is only 12 hours at 155° C. Therefore, the performance of the novel high temperature and corona resistant ceramic film covered wire proposed by the present invention is significantly improved, and the use advantage is more obvious.
  • a novel high-temperature corona-resistant ceramic film-covered wire comprising: a conductive metal (1) whose outer surface is aluminum-based, an organic insulating layer (3), and is characterized in that: further comprising a ceramic layer (2), a ceramic layer (2) ) is coated on the surface of the conductive metal (1) whose outer surface is aluminum-based, and the organic insulating layer (3) is coated on the outer surface of the ceramic layer (2).
  • the cross-section of the conductive metal (1) whose outer surface is aluminum-based is a circle, an ellipse or a polygon.
  • the number of conductive metals (1) whose outer surfaces are aluminum-based is one or more, and when the number of conductive metals (1) whose outer surfaces are aluminum-based is multiple, the outer surfaces are aluminum-based.
  • the conductive metals (1) are arranged in parallel or in a woven and entangled manner.
  • the conductive metal (1) whose outer surface is aluminum-based is an aluminum-based conductive wire
  • the material of the aluminum-based conductive wire includes aluminum alloy or pure aluminum.
  • the ceramic layer (2) is grown in-situ on the surface of the conductive metal (1) whose outer surface is an aluminum base by means of micro-arc oxidation.
  • the thickness of the ceramic layer (2) is 0-200um.
  • the thickness of the ceramic layer (2) is 0-60um.
  • the thickness of the ceramic layer (2) is 60-200um.
  • the main material of the ceramic layer (2) is ⁇ -type and/or 'Y-type Al 2 O 3 .
  • the organic insulating layer (3) is fixed on the outer surface of the ceramic layer (2) by at least one of wrapping, direct sheathing, painting, or melting.
  • the material of the organic insulating layer (3) includes but is not limited to polyimide, amide polyimide, polyester, polyimide poly, ester polytetrafluoroethylene, polyvinyl formaldehyde, polyurethane A kind of ester, polyester imide, aramid.
  • the present invention proposes a novel high-temperature corona-resistant ceramic film-covered wire, comprising a conductive metal (1) whose outer surface is an aluminum base, an organic insulating layer (3) and a ceramic layer (2), and a ceramic layer ( 2) Growing in-situ on the surface of the conductive metal (1) whose outer surface is an aluminum base by means of micro-arc oxidation, and the organic insulating layer (3) is coated on the outer surface of the ceramic layer (2). Since the micro-arc oxidation method can make the ceramic layer (2) and the aluminum base to be covalently exchanged and tightly combined, the finally formed electromagnetic wire has the advantages of good high temperature resistance, corrosion resistance, strong mechanical properties and corona resistance.
  • the corona resistance time can be increased to 250 hours to 330 hours, far exceeding the 12 hours specified by the national standard.
  • the organic insulating layer is wound on the outer layer of the ceramic layer, so that the ceramic film-covered wire has good insulating properties.
  • FIG. 1 is a schematic structural diagram of the high temperature resistant ceramic insulated magnet wire of the present invention.
  • FIG. 1 it is a schematic diagram of the structure of the high-temperature and corona-resistant ceramic film-covered wire of the present invention, which includes: the structure of a single flat aluminum wire in the inner layer, an ⁇ -type ceramic layer in the middle layer and a polyimide in the outer layer,
  • the preparation process of the high-temperature and corona-resistant ceramic insulating film- covered wire is as follows: first, a solution with a Na 2 SiO 3 concentration of 20%, a NaClO 3 concentration of 25%, and a KOH concentration of 5% is prepared; Put the above solution in the plating tank, control the moving speed of the flat aluminum wire so that the time of the flat aluminum wire in the plating tank is 80 to 120 seconds, the power supply of the plating tank adopts the cross-current mode, and the current with a current density of 5A/mm 2 is applied, and the voltage varies with the flat aluminum.
  • the wire resistance changes; then, put the flat aluminum wire into the oven after passing through the plating pool, the oven temperature is set at 150 ° C, and the flat aluminum wire passes through the oven for 30 to 45 seconds to evaporate the residual moisture; after the flat aluminum wire passes through the oven , a certain thickness of ⁇ -type ceramic layer is attached to the surface.
  • the thickness of the ceramic layer is directly related to the performance of the final high-temperature and corona-resistant ceramic film-covered wire product.
  • the thickness of the ceramic layer is 0-60 ⁇ m
  • the thickness of the ceramic layer is The larger the value, the higher the breakdown voltage of the entire ceramic film-covered wire and the higher the corona resistance life.
  • the corona resistance life of the above five samples is more than 70 hours, far exceeding the 12 hours specified by the national standard.
  • the thickness of the ceramic layer is 25-60 ⁇ m, the corona resistance life at 155°C can reach 250-300 hours, the breakdown voltage can reach 400-550V, and the corona resistance and breakdown performance are excellent. .
  • FIG. 1 it is a schematic diagram of the structure of the high-temperature and corona-resistant ceramic film-covered wire of the present invention, which includes: the structure of a single flat aluminum wire in the inner layer, an ⁇ -type ceramic layer in the middle layer and a polyimide in the outer layer,
  • the preparation process of the high-temperature-resistant and corona-resistant ceramic insulating film-covered wire is as follows: first, an aqueous solution of 0.3 mol/L oxalic acid and 50% (volume) ethylene glycol is prepared; Plating pool, control the moving speed of the flat aluminum wire so that the time of the flat aluminum wire in the plating pool is 200-300 seconds; the power supply of the plating pool adopts the constant current mode, applying a current with a current density of 1.5A/mm 2 , and the voltage varies with the resistance of the flat aluminum wire Change; then, the flat aluminum wire enters the oven after passing through the plating tank, the oven temperature is set at 150 ° C, and the flat aluminum wire passes through
  • the width of the prepreg polyimide film required for the flat aluminum wire is calculated as the perimeter of the flat wire/2+8 ;Fix the flat aluminum wire on the wrapping machine, and place a roll of prepreg film tape on the insulating paper holder; adjust the polyimide film tape and the flat aluminum wire to incline 15-45°, and adjust the angle to make the polyimide film tape.
  • the lap distance of the imine film tape on the surface of the flat aluminum wire is between 3 and 5 mm; while the film is wound, a current of 10kHZ and a current density of 3.5A/mm 2 is applied to the flat aluminum wire to heat the flat aluminum wire and melt the film After the prepreg is melted, the film is only wound on the surface of the ceramic flat aluminum wire, and the flat aluminum wire is gradually cooled to room temperature in the air to form a solid composite wire; at this time, the surface of the flat aluminum wire is attached to 65 ⁇ m
  • the composite insulating layer composed of the left and right ⁇ -type ceramic layers and one layer of polyimide film is sample 6.
  • FIG. 1 it is a schematic diagram of the structure of the high-temperature and corona-resistant ceramic film-covered wire of the present invention, which includes: the structure of a single flat aluminum wire in the inner layer, an ⁇ -type ceramic layer in the middle layer and a polyimide in the outer layer,
  • the preparation process of the high-temperature and corona-resistant ceramic insulating film-covered wire is as follows: first, a solution with a Na 2 AlO 2 concentration of 10%, a NaClO 3 concentration of 15%, and a KOH concentration of 6% is prepared; solution put above the bath, so that the moving speed controlling round aluminum round aluminum plating bath at the time of 150 to 225 seconds; the bath constant current power supply mode, the current applied to the current density 3A / mm 2 to a voltage with a round
  • the resistance of the aluminum wire changes; the round aluminum wire enters the oven after passing through the plating bath, the oven temperature is set at 150 °C, and the round aluminum wire passes through the oven for 30 to 45 seconds to evaporate
  • the inner diameter of the round mold 1 is 10 ⁇ m larger than the outer diameter of the ceramic far aluminum wire to ensure that the insulating paint can only be used on the round aluminum wire.
  • the surface of the wire is attached to 10 ⁇ m; the round aluminum wire passes through the oven, the oven temperature is set at 450 ° C, and the round aluminum wire passes through the oven for 15 to 23 seconds.
  • the fixed pulley returns to the organic solution pool, and passes through the circular mold 2 again.
  • the inner diameter of the circular mold 2 is 10 ⁇ m larger than the inner diameter of the circular mold 1, and passes through the oven again, so that the round aluminum wire passes through the organic solution pool every time.
  • Both the mold and the oven will attach a 10 ⁇ m polyimide layer to the outside of the round aluminum wire; after 8 to 9 times of this process, a polyimide layer of 80 to 90 ⁇ m is formed; at this time, the surface of the round aluminum wire is attached to about 30 ⁇ m
  • the composite insulating layer composed of ⁇ -type ceramics and 80-90 ⁇ m polyimide is sample 7.
  • the new high-temperature corona-resistant ceramic film-covered wire with the structure of the present invention can meet the requirements of the national standard for its maximum temperature resistance, and the corona resistance time at 155°C can be as high as 250 hours to 330 hours, and its performance far exceeds the current performance. Some properties of magnet wire.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

A high-temperature-resistant and corona-resistant ceramic membrane covered wire, mainly comprising a three-layer structure, including a conductive metal (1) with an aluminum-based outer surface, a ceramic layer (2) and an organic insulating layer (3) from inside to outside, wherein the ceramic layer (2) is grown in-situ on the surface of the conductive metal (1) with the aluminum-based outer surface by means of micro-arc oxidation.

Description

一种新型高温耐电晕陶瓷膜包线A New Type of High Temperature Corona Resistant Ceramic Film Covered Wire 技术领域technical field
本发明涉及电磁线技术领域，较为具体的，涉及到一种新型耐高温耐电晕陶瓷膜包线。The invention relates to the technical field of electromagnetic wires, and more specifically, relates to a novel high-temperature-resistant and corona-resistant ceramic film-covered wire.
背景技术Background technique
目前，市场上现有的电磁线的结构通常采用内层导电金属、外层绝缘层的结构，目前比较好的电磁线的的最高耐受温度为220℃，在155℃时耐电晕时间长为70小时。现有的电磁线在高温下的耐电晕时间长有待提升。At present, the structure of the existing magnet wire on the market usually adopts the structure of the inner layer of conductive metal and the outer layer of insulating layer. The current best magnet wire has a maximum temperature resistance of 220°C, and a long corona resistance time at 155°C. for 70 hours. The corona resistance time of the existing magnet wire under high temperature needs to be improved.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明提出一种新型耐高温耐电晕陶瓷膜包线，其主要包括三层结构，由内而外分别为外表面为铝基的导电金属、陶瓷层和有机绝缘层，其中陶瓷层采用微弧氧化的方式原位生长在外表面为铝基的导电金属的表面，采用这种结构的陶瓷膜包线在155℃时的耐电晕时间长可以延长至250小时～330小时，而国标要求的陶瓷膜包线在155℃时的耐电晕时间长仅为12小时，故本发明提出的新型耐高温耐电晕的陶瓷膜包线的性能显著提升，使用优势更加明显。In view of this, the present invention proposes a new type of high-temperature and corona-resistant ceramic film-covered wire, which mainly includes a three-layer structure, from the inside to the outside, the outer surface is an aluminum-based conductive metal, a ceramic layer and an organic insulating layer, wherein The ceramic layer is grown in situ on the surface of the conductive metal whose outer surface is aluminum base by means of micro-arc oxidation. The corona resistance time of the ceramic film covered wire with this structure can be extended to 250 hours to 330 hours at 155 °C. However, the corona resistance time of the ceramic film covered wire required by the national standard is only 12 hours at 155° C. Therefore, the performance of the novel high temperature and corona resistant ceramic film covered wire proposed by the present invention is significantly improved, and the use advantage is more obvious.
一种新型高温耐电晕陶瓷膜包线，其包括：外表面为铝基的导电金属(1)、有机绝缘层(3)，其特征在于：还包括陶瓷层(2)，陶瓷层(2)包覆在外表面为铝基的导电金属(1)的表面，有机绝缘层(3)包覆在陶瓷层(2)的外表面。A novel high-temperature corona-resistant ceramic film-covered wire, comprising: a conductive metal (1) whose outer surface is aluminum-based, an organic insulating layer (3), and is characterized in that: further comprising a ceramic layer (2), a ceramic layer (2) ) is coated on the surface of the conductive metal (1) whose outer surface is aluminum-based, and the organic insulating layer (3) is coated on the outer surface of the ceramic layer (2).
进一步的，外表面为铝基的导电金属(1)的横截面为圆形、椭圆形或者多边形。Further, the cross-section of the conductive metal (1) whose outer surface is aluminum-based is a circle, an ellipse or a polygon.
进一步的，外表面为铝基的导电金属(1)的数量为1根或多根，当外表面为铝基的导电金属(1)的数量为多根时，多根外表面为铝基的导电金属(1)平行排布或者以编织纠缠的方式排布。Further, the number of conductive metals (1) whose outer surfaces are aluminum-based is one or more, and when the number of conductive metals (1) whose outer surfaces are aluminum-based is multiple, the outer surfaces are aluminum-based. The conductive metals (1) are arranged in parallel or in a woven and entangled manner.
进一步的，所述的外表面为铝基的导电金属(1)为铝基材导电线，铝基 材导电线的材质包括铝合金或者纯铝。Further, the conductive metal (1) whose outer surface is aluminum-based is an aluminum-based conductive wire, and the material of the aluminum-based conductive wire includes aluminum alloy or pure aluminum.
进一步的，陶瓷层(2)通过微弧氧化的方式原位生长在外表面为铝基的导电金属(1)的表面。Further, the ceramic layer (2) is grown in-situ on the surface of the conductive metal (1) whose outer surface is an aluminum base by means of micro-arc oxidation.
进一步的，陶瓷层(2)的厚度为0～200um。Further, the thickness of the ceramic layer (2) is 0-200um.
进一步的，陶瓷层(2)的厚度为0～60um。Further, the thickness of the ceramic layer (2) is 0-60um.
进一步的，陶瓷层(2)的厚度为60～200um。Further, the thickness of the ceramic layer (2) is 60-200um.
进一步的，陶瓷层(2)的主要材质为ɑ型和/或′Y型Al 2O 3。 Further, the main material of the ceramic layer (2) is α-type and/or 'Y-type Al 2 O 3 .
进一步的，有机绝缘层(3)采用绕包包覆、直接穿套、涂漆、或者融覆中的至少一种方式固定在陶瓷层(2)的外表面。Further, the organic insulating layer (3) is fixed on the outer surface of the ceramic layer (2) by at least one of wrapping, direct sheathing, painting, or melting.
进一步的，有机绝缘层(3)的材质包括但不限定于聚酰亚胺、胺酰聚酰亚胺、聚酯、聚亚胺聚、酯聚四氟乙烯、聚乙烯甲醛、聚氨基甲酸酯、聚酯亚胺、芳纶中的一种。Further, the material of the organic insulating layer (3) includes but is not limited to polyimide, amide polyimide, polyester, polyimide poly, ester polytetrafluoroethylene, polyvinyl formaldehyde, polyurethane A kind of ester, polyester imide, aramid.
本发明的有益效果：本发明提出一种新型高温耐电晕陶瓷膜包线，包括外表面为铝基的导电金属(1)、有机绝缘层(3)和陶瓷层(2)，陶瓷层(2)通过微弧氧化的方式原位生长在外表面为铝基的导电金属(1)的表面，有机绝缘层(3)包覆在陶瓷层(2)的外表面。由于采用微弧氧化的方式能够使得陶瓷层(2)与铝基进行共价交换，紧密结合，所以最终形成的电磁线具有较好的耐高温、耐腐蚀、机械性能强、耐电晕的优势，尤其是在155℃的高温下的耐电晕时间更是可以提升至250小时～330小时，远远超过国标规定的12小时。另外，有机绝缘层缠绕在陶瓷层的外层，使得陶瓷膜包线具有良好的绝缘性能。Beneficial effects of the present invention: The present invention proposes a novel high-temperature corona-resistant ceramic film-covered wire, comprising a conductive metal (1) whose outer surface is an aluminum base, an organic insulating layer (3) and a ceramic layer (2), and a ceramic layer ( 2) Growing in-situ on the surface of the conductive metal (1) whose outer surface is an aluminum base by means of micro-arc oxidation, and the organic insulating layer (3) is coated on the outer surface of the ceramic layer (2). Since the micro-arc oxidation method can make the ceramic layer (2) and the aluminum base to be covalently exchanged and tightly combined, the finally formed electromagnetic wire has the advantages of good high temperature resistance, corrosion resistance, strong mechanical properties and corona resistance. , especially at a high temperature of 155 ° C, the corona resistance time can be increased to 250 hours to 330 hours, far exceeding the 12 hours specified by the national standard. In addition, the organic insulating layer is wound on the outer layer of the ceramic layer, so that the ceramic film-covered wire has good insulating properties.
附图说明Description of drawings
图1为本发明的耐高温的陶瓷绝缘电磁线的结构示意图。FIG. 1 is a schematic structural diagram of the high temperature resistant ceramic insulated magnet wire of the present invention.
主要元件符号说明Description of main component symbols
外表面为铝基的导电金属Conductive metal with an aluminum base on the outer surface 11
陶瓷层 ceramic layer 22
有机绝缘层organic insulating layer 33
如下具体实施方式将结合上述附图进一步说明本发明。The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.
具体实施方式1 Embodiment 1
如图1所示，为本发明的耐高温耐电晕陶瓷膜包线的结构示意图，其包括：内层单根扁铝线、中间层ɑ型陶瓷层和外层聚酰亚胺的结构，所述的耐高温耐电晕的陶瓷绝缘膜包线的制备过程如下：首先，调制Na 2SiO 3浓度20％，NaClO 3浓度25％，KOH浓度5％的溶液；其次，扁铝线通过盛放以上溶液的镀池，控制扁铝线移动速度使得扁铝线在镀池中时间为80～120秒，镀池电源采用横流模式，施加电流密度为5A/mm 2的电流，电压随扁铝线电阻变化；接着，将扁铝线通过镀池后放入烤箱，烤箱温度设置在150℃，扁铝线经过烤箱时间为30～45秒，用以蒸发残留的水分；扁铝线通过烤箱后，表面附着了一定厚度左右的α型陶瓷层。最后，准备在陶瓷扁铝线缠绕聚酰亚胺薄膜：根据扁铝线规格选择所需聚酰亚胺薄膜宽度，宽度计算为扁线的周长/2+8；将扁线固定在包纸机上，将两卷薄膜带放置于绝缘纸固定架；调整聚酰亚胺薄膜带与扁铝线呈30～60°倾斜，通过调整角度，使得聚酰亚胺薄膜带在扁铝线表面搭接尺寸占薄膜带宽度的50％；两卷聚酰亚胺薄膜带缠绕在扁铝线上的倾斜方向相反；此时扁铝线表面即附着了一定厚度的α型陶瓷和2层聚酰亚胺薄膜组成的复合绝缘层。采用该制备方法获得5个不同厚度陶瓷层的耐高温耐电晕陶瓷膜包线样品，其性能测试结果如下表所示： As shown in Figure 1, it is a schematic diagram of the structure of the high-temperature and corona-resistant ceramic film-covered wire of the present invention, which includes: the structure of a single flat aluminum wire in the inner layer, an ɑ-type ceramic layer in the middle layer and a polyimide in the outer layer, The preparation process of the high-temperature and corona-resistant ceramic insulating film- covered wire is as follows: first, a solution with a Na 2 SiO 3 concentration of 20%, a NaClO 3 concentration of 25%, and a KOH concentration of 5% is prepared; Put the above solution in the plating tank, control the moving speed of the flat aluminum wire so that the time of the flat aluminum wire in the plating tank is 80 to 120 seconds, the power supply of the plating tank adopts the cross-current mode, and the current with a current density of 5A/mm 2 is applied, and the voltage varies with the flat aluminum. The wire resistance changes; then, put the flat aluminum wire into the oven after passing through the plating pool, the oven temperature is set at 150 ° C, and the flat aluminum wire passes through the oven for 30 to 45 seconds to evaporate the residual moisture; after the flat aluminum wire passes through the oven , a certain thickness of α-type ceramic layer is attached to the surface. Finally, prepare to wrap the polyimide film on the ceramic flat aluminum wire: select the required width of the polyimide film according to the specifications of the flat aluminum wire, and the width is calculated as the circumference of the flat wire/2+8; fix the flat wire on the wrapping paper On the machine, place two rolls of film tape on the insulating paper holder; adjust the inclination of the polyimide film tape and the flat aluminum wire to be 30-60°, and adjust the angle to make the polyimide film tape overlap on the surface of the flat aluminum wire The size accounts for 50% of the width of the film tape; the two rolls of polyimide film tape are wound in opposite directions on the flat aluminum wire; at this time, a certain thickness of α-type ceramic and 2 layers of polyimide are attached to the surface of the flat aluminum wire A composite insulating layer composed of thin films. Using this preparation method, five samples of high temperature and corona resistant ceramic film covered wire with different thickness ceramic layers were obtained, and the performance test results are shown in the following table:
Figure PCTCN2020140867-appb-000001
Figure PCTCN2020140867-appb-000001
从上表中的5个样品的性能，可以看出，陶瓷层的厚度跟最终耐高温耐电晕陶瓷膜包线产品的性能直接相关，当陶瓷层的厚度在0～60μm时，陶瓷层厚度越大，整个陶瓷膜包线的击穿电压越高，耐电晕寿命越高。以上5个样品的耐电晕寿命在70小时以上，远超国标规定的12小时。另外，在陶瓷层厚度为25～60μm时，在155℃耐电晕寿命可以达到250～300小时之间，击穿电压可以达到400～550V之间，耐电晕性能和击穿性能都很优越。From the performance of the 5 samples in the table above, it can be seen that the thickness of the ceramic layer is directly related to the performance of the final high-temperature and corona-resistant ceramic film-covered wire product. When the thickness of the ceramic layer is 0-60 μm, the thickness of the ceramic layer is The larger the value, the higher the breakdown voltage of the entire ceramic film-covered wire and the higher the corona resistance life. The corona resistance life of the above five samples is more than 70 hours, far exceeding the 12 hours specified by the national standard. In addition, when the thickness of the ceramic layer is 25-60 μm, the corona resistance life at 155°C can reach 250-300 hours, the breakdown voltage can reach 400-550V, and the corona resistance and breakdown performance are excellent. .
具体实施方式2 Embodiment 2
如图1所示，为本发明的耐高温耐电晕陶瓷膜包线的结构示意图，其包 括：内层单根扁铝线、中间层ɑ型陶瓷层和外层聚酰亚胺的结构，所述的耐高温耐电晕的陶瓷绝缘膜包线的制备过程如下：首先，调制草酸0.3mol/L，乙二醇50％(体积)的水溶液；其次，扁铝线通过盛放以上溶液的镀池，控制扁铝线移动速度使得扁铝线在镀池中时间为200～300秒；镀池电源采用恒流模式，施加电流密度为1.5A/mm 2的电流，电压随扁铝线电阻变化；接着，扁铝线通过镀池后进入烤箱，烤箱温度设置在150℃，扁铝线经过烤箱时间为30～45秒，用以蒸发残留的水分；扁铝线通过烤箱后，表面附着了65μm左右的γ型陶瓷层；接着，准备在陶瓷扁铝线熔覆聚酰亚胺薄膜：扁铝线所需预浸聚酰亚胺薄膜宽度，宽度计算为扁线的周长/2+8；将扁铝线固定在包纸机上，将一卷预浸薄膜带放置于绝缘纸固定架；调整聚酰亚胺薄膜带与扁铝线呈15～45°倾斜，通过调整角度，使得聚酰亚胺薄膜带在扁铝线表面搭接距离3～5mm之间；在薄膜缠绕的同时，对扁铝线施加10kHZ，电流密度为3.5A/mm 2的电流，使得扁铝线加热，融化薄膜的预浸胶；预浸胶融化后，薄膜仅仅缠绕在陶瓷扁铝线表面，扁铝线在空气中逐渐冷却至室温后，形成了牢固的复合导线；此时扁铝线表面即附着了65μm左右的γ型陶瓷层和1层聚酰亚胺薄膜组成的复合绝缘层，即为样品6。 As shown in Figure 1, it is a schematic diagram of the structure of the high-temperature and corona-resistant ceramic film-covered wire of the present invention, which includes: the structure of a single flat aluminum wire in the inner layer, an ɑ-type ceramic layer in the middle layer and a polyimide in the outer layer, The preparation process of the high-temperature-resistant and corona-resistant ceramic insulating film-covered wire is as follows: first, an aqueous solution of 0.3 mol/L oxalic acid and 50% (volume) ethylene glycol is prepared; Plating pool, control the moving speed of the flat aluminum wire so that the time of the flat aluminum wire in the plating pool is 200-300 seconds; the power supply of the plating pool adopts the constant current mode, applying a current with a current density of 1.5A/mm 2 , and the voltage varies with the resistance of the flat aluminum wire Change; then, the flat aluminum wire enters the oven after passing through the plating tank, the oven temperature is set at 150 ° C, and the flat aluminum wire passes through the oven for 30 to 45 seconds to evaporate the residual moisture; after the flat aluminum wire passes through the oven, the surface is attached. γ-type ceramic layer of about 65μm; then, prepare to clad polyimide film on the ceramic flat aluminum wire: the width of the prepreg polyimide film required for the flat aluminum wire, the width is calculated as the perimeter of the flat wire/2+8 ;Fix the flat aluminum wire on the wrapping machine, and place a roll of prepreg film tape on the insulating paper holder; adjust the polyimide film tape and the flat aluminum wire to incline 15-45°, and adjust the angle to make the polyimide film tape. The lap distance of the imine film tape on the surface of the flat aluminum wire is between 3 and 5 mm; while the film is wound, a current of 10kHZ and a current density of 3.5A/mm 2 is applied to the flat aluminum wire to heat the flat aluminum wire and melt the film After the prepreg is melted, the film is only wound on the surface of the ceramic flat aluminum wire, and the flat aluminum wire is gradually cooled to room temperature in the air to form a solid composite wire; at this time, the surface of the flat aluminum wire is attached to 65μm The composite insulating layer composed of the left and right γ-type ceramic layers and one layer of polyimide film is sample 6.
具体实施方式3 Embodiment 3
如图1所示，为本发明的耐高温耐电晕陶瓷膜包线的结构示意图，其包括：内层单根扁铝线、中间层ɑ型陶瓷层和外层聚酰亚胺的结构，所述的耐高温耐电晕的陶瓷绝缘膜包线的制备过程如下：首先，调制Na 2AlO 2浓度10％，NaClO 3浓度15％，KOH浓度6％的溶液；接着，圆铝线通过盛放以上溶液的镀池，控制圆铝线移动速度使得圆铝线在镀池中时间为150～225秒；镀池电源采用恒流模式，施加电流密度为3A/mm 2的电流，电压随圆铝线电阻变化；圆铝线通过镀池后进入烤箱，烤箱温度设置在150℃，圆铝线经过烤箱时间为30～45秒，用以蒸发残留的水分；圆铝线通过烤箱后，表面附着了30μm左右的α型陶瓷层；接着，准备在陶瓷圆铝线涂覆聚酰亚胺绝缘漆：在有机池中调制1,2,4′-三氨基联苯醚50％和1,3-偏苯二乙酸酐酰氯50％溶液；圆铝线通过有机溶液池后，经过圆形模具1，圆形模具1的内径较陶瓷远铝线的外径大10μm，保证绝缘漆仅能在圆铝线表面附着10μm；圆铝线通过烤箱， 烤箱温度设置在450℃，圆铝线经过烤箱时间为15～23秒，此时有机溶液成分发生化学反应，缩聚成聚酰亚胺；圆铝线通过定滑轮回到有机溶液池，并再次通过圆形模具2，圆形模具2的内径较圆形模具1的内径大10μm，并再次通过烤箱，使得圆铝线每一次经过有机溶液池，圆形模具和烤箱，均会在圆铝线外附着10μm聚酰亚胺层；经过8～9次此过程，使得形成80～90μm的聚酰亚胺层；此时圆铝线表面即附着了30μm左右的α型陶瓷和80～90μm的聚酰亚胺组成的复合绝缘层，即为样品7。 As shown in Figure 1, it is a schematic diagram of the structure of the high-temperature and corona-resistant ceramic film-covered wire of the present invention, which includes: the structure of a single flat aluminum wire in the inner layer, an ɑ-type ceramic layer in the middle layer and a polyimide in the outer layer, The preparation process of the high-temperature and corona-resistant ceramic insulating film-covered wire is as follows: first, a solution with a Na 2 AlO 2 concentration of 10%, a NaClO 3 concentration of 15%, and a KOH concentration of 6% is prepared; solution put above the bath, so that the moving speed controlling round aluminum round aluminum plating bath at the time of 150 to 225 seconds; the bath constant current power supply mode, the current applied to the current density 3A / mm 2 to a voltage with a round The resistance of the aluminum wire changes; the round aluminum wire enters the oven after passing through the plating bath, the oven temperature is set at 150 °C, and the round aluminum wire passes through the oven for 30 to 45 seconds to evaporate the residual moisture; The α-type ceramic layer of about 30 μm was prepared; then, the ceramic round aluminum wire was prepared to be coated with polyimide insulating varnish: 1,2,4′-triaminobiphenyl ether 50% and 1,3- Triphthalic anhydride acid chloride 50% solution; after the round aluminum wire passes through the organic solution pool, it passes through the round mold 1. The inner diameter of the round mold 1 is 10 μm larger than the outer diameter of the ceramic far aluminum wire to ensure that the insulating paint can only be used on the round aluminum wire. The surface of the wire is attached to 10 μm; the round aluminum wire passes through the oven, the oven temperature is set at 450 ° C, and the round aluminum wire passes through the oven for 15 to 23 seconds. The fixed pulley returns to the organic solution pool, and passes through the circular mold 2 again. The inner diameter of the circular mold 2 is 10 μm larger than the inner diameter of the circular mold 1, and passes through the oven again, so that the round aluminum wire passes through the organic solution pool every time. Both the mold and the oven will attach a 10μm polyimide layer to the outside of the round aluminum wire; after 8 to 9 times of this process, a polyimide layer of 80 to 90μm is formed; at this time, the surface of the round aluminum wire is attached to about 30μm The composite insulating layer composed of α-type ceramics and 80-90 μm polyimide is sample 7.
如上所述的三个具体实施方式中的样品1～样品7的测试性能如下表格所示：The test performances of samples 1 to 7 in the above three specific embodiments are shown in the following table:
Figure PCTCN2020140867-appb-000002
Figure PCTCN2020140867-appb-000002
由此可见，采用本发明的结构的新型高温耐电晕陶瓷膜包线，其最高耐受温度均能达到国标要求，且155℃耐电晕时间可以高达250小时～330小时，性能远超现有的电磁线的性能。It can be seen that the new high-temperature corona-resistant ceramic film-covered wire with the structure of the present invention can meet the requirements of the national standard for its maximum temperature resistance, and the corona resistance time at 155°C can be as high as 250 hours to 330 hours, and its performance far exceeds the current performance. Some properties of magnet wire.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详 细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above-described embodiments only represent several embodiments of the present invention, and their descriptions are more specific and detailed, but should not therefore be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (11)

  1. 一种新型高温耐电晕陶瓷膜包线，其包括：外表面为铝基的导电金属(1)、有机绝缘层(3)，其特征在于：还包括陶瓷层(2)，陶瓷层(2)包覆在外表面为铝基的导电金属(1)的表面，有机绝缘层(3)包覆在陶瓷层(2)的外表面。A novel high-temperature corona-resistant ceramic film-covered wire, comprising: a conductive metal (1) whose outer surface is an aluminum base, and an organic insulating layer (3), characterized in that it further comprises a ceramic layer (2), a ceramic layer (2). ) is coated on the surface of the conductive metal (1) whose outer surface is aluminum-based, and the organic insulating layer (3) is coated on the outer surface of the ceramic layer (2).
  2. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：外表面为铝基的导电金属(1)的横截面为圆形、椭圆形或者多边形。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that the cross-section of the conductive metal (1) whose outer surface is aluminum-based is a circle, an ellipse, or a polygon.
  3. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：外表面为铝基的导电金属(1)的数量为1根或多根，当外表面为铝基的导电金属(1)的数量为多根时，多根外表面为铝基的导电金属(1)平行排布或者以编织纠缠的方式排布。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that: the number of conductive metals (1) whose outer surface is aluminum-based is one or more, and when the outer surface is aluminum-based conductive metal When the number of (1) is multiple, the multiple conductive metals (1) whose outer surfaces are aluminum-based are arranged in parallel or in a woven and entangled manner.
  4. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：所述的外表面为铝基的导电金属(1)为铝基材导电线，铝基材导电线的材质包括铝合金或者纯铝。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that: the conductive metal (1) whose outer surface is aluminum-based is an aluminum-based conductive wire, and the material of the aluminum-based conductive wire includes: Aluminum alloy or pure aluminum.
  5. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：陶瓷层(2)通过微弧氧化的方式原位生长在外表面为铝基的导电金属(1)的表面。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that the ceramic layer (2) is grown in-situ on the surface of the conductive metal (1) whose outer surface is aluminum-based by means of micro-arc oxidation.
  6. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：陶瓷层(2)的厚度为0～200um。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that: the thickness of the ceramic layer (2) is 0-200um.
  7. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：陶瓷层(2)的厚度为0～60um。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that: the thickness of the ceramic layer (2) is 0-60um.
  8. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：陶瓷层(2)的厚度为60～200um。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that: the thickness of the ceramic layer (2) is 60-200um.
  9. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：陶瓷层(2)的主要材质为ɑ型和/或′Y型Al 2O 3。 The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that: the main material of the ceramic layer (2) is α-type and/or 'Y-type Al 2 O 3 .
  10. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：有机绝缘层(3)采用绕包包覆、直接穿套、涂漆、或者融覆中的至少一种方式固定在陶瓷层(2)的外表面。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that: the organic insulating layer (3) is fixed by at least one method of wrapping, directly piercing, painting, or melting on the outer surface of the ceramic layer (2).
  11. 如权利要求1所述的新型高温耐电晕陶瓷膜包线，其特征在于：有机绝缘层(3)的材质包括：聚酰亚胺、胺酰聚酰亚胺、聚酯、聚亚胺聚、 酯聚四氟乙烯、聚乙烯甲醛、聚氨基甲酸酯、聚酯亚胺、芳纶中的一种。The novel high-temperature corona-resistant ceramic film-covered wire according to claim 1, characterized in that: the material of the organic insulating layer (3) comprises: polyimide, amide polyimide, polyester, polyimide polyimide , Ester polytetrafluoroethylene, polyvinyl formaldehyde, polyurethane, polyester imide, aramid fiber.
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CN111653381B (en) * 2020-06-29 2021-11-12 西比里电机技术(苏州)有限公司 High-temperature corona-resistant ceramic film covered wire
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140110147A1 (en) * 2012-10-18 2014-04-24 Ford Global Technologies, Llc Polymeric overcoated anodized wire
CN103952742A (en) * 2014-04-22 2014-07-30 上海理工大学 Copper lead with insulating layer and preparation method thereof
CN106601356A (en) * 2016-12-21 2017-04-26 川叶电子科技（上海）股份有限公司 High temperature-resistant wire and preparation method of corresponding composite precursor ceramic tape
CN111627592A (en) * 2020-07-01 2020-09-04 西比里电机技术(苏州)有限公司 High-temperature-resistant corona-resistant ceramic film covered wire and preparation method thereof
CN111653381A (en) * 2020-06-29 2020-09-11 西比里电机技术(苏州)有限公司 Novel high-temperature corona-resistant ceramic film covered wire

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1233062A (en) * 1998-04-22 1999-10-27 张德高 High voltage wire and cable with less corona discharge and its production
CN1311354A (en) * 2001-01-20 2001-09-05 来永春 Method and device for coating metal surface by micro arc oxidation
US7015260B2 (en) * 2003-06-04 2006-03-21 E.I. Du Pont De Nemours And Company High temperature polymeric materials containing corona resistant composite filler, and methods relating thereto
CN1805064A (en) * 2006-01-13 2006-07-19 慧坦科技股份有限公司 Method of isolating electromagnetic wave from conductors
CN2879358Y (en) * 2006-01-13 2007-03-14 慧坦科技股份有限公司 Conductive wire capable of obstructing electromagnetic wave
DE102014219441A1 (en) * 2014-09-25 2016-03-31 Siemens Aktiengesellschaft Corona protection system and electrical machine
CN105006285A (en) * 2015-07-09 2015-10-28 大连四方电泵有限公司 High-temperature-resistant ceramic electromagnetic wire
CN106702329B (en) * 2015-11-12 2020-04-17 中国科学院金属研究所 Micro-arc oxidation ceramic coating based on multi-arc ion aluminizing on titanium alloy surface and preparation method thereof
CN208240383U (en) * 2018-05-25 2018-12-14 浙江技鸣电工器材有限公司 A kind of winding wire resistant to high temperature
CN109183112A (en) * 2018-09-26 2019-01-11 沈阳大学 A kind of aluminum alloy surface low pressure ceramic coating formed by micro-arc oxidation preparation method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140110147A1 (en) * 2012-10-18 2014-04-24 Ford Global Technologies, Llc Polymeric overcoated anodized wire
CN103952742A (en) * 2014-04-22 2014-07-30 上海理工大学 Copper lead with insulating layer and preparation method thereof
CN106601356A (en) * 2016-12-21 2017-04-26 川叶电子科技（上海）股份有限公司 High temperature-resistant wire and preparation method of corresponding composite precursor ceramic tape
CN111653381A (en) * 2020-06-29 2020-09-11 西比里电机技术(苏州)有限公司 Novel high-temperature corona-resistant ceramic film covered wire
CN111627592A (en) * 2020-07-01 2020-09-04 西比里电机技术(苏州)有限公司 High-temperature-resistant corona-resistant ceramic film covered wire and preparation method thereof

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