Multilayer insulated wire and transformer using same
A technology of multi-layer insulation and insulating layer, applied in the field of transformers, can solve problems such as the influence of thermal transformers
Inactive Publication Date: 2003-06-18
FURUKAWA ELECTRIC CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0007] However, it cannot be said that such multi-layer extrusion-coated insulated wire satisfactorily meets the requirements for improving the performance of transformers in the future, which will become more and more stringent
[0008] First, as electrical / electronic equipment becomes smaller in recent years, the generated heat easily affects the transformer, and therefore, even in the case of the above-mentioned three-layer extrusion-coated insulated wire, higher resistance is required. heat
Method used
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Examples
Experimental program
Comparison scheme
Effect test
example 1 to 9 and comparative example 1 to 3
[0053] On each conductor shown in Tables 1 and 2, a three-layer insulating coating composed of a resin mixture having a combination shown in Tables 1 and 2 was formed, and the surface treatment shown in Tables 1 and 2 was performed to manufacture a multilayer insulated wire. In Example 9, the conductor consisted of seven twisted wires each covered with polyamide-imide and 0.15 mm in diameter, and in other cases the conductors were annealed copper wires of 0.4 mm in diameter. The thickness of each insulating coating is 33 microns, and the total thickness of all three layers is 100 microns.
[0054] For the multilayer insulated wire thus obtained, the following characteristics were tested or determined, and the results are shown in Tables 1 and 2.
[0055] (1) Solvent resistance
[0056] According to JIS C 3003 -1984 For the determination of 14.1(2) and 15.1, after the insulated wire is immersed in xylene at 60°C for 30 minutes, the presence or absence of swelling of the coa...
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Abstract
A multilayer insulated wire has two or more extrusion-coating insulating layers provided on a conductor directly or via some other layer, or provided on the outside of a multicore wire composed of conductor cores or insulated cores that are collected together, wherein at least one of the insulating layers is made of a mixture prepared by mixing 100 parts by weight of a polyethersulfone resin and 10 to 100 parts by weight of an inorganic filler. A transformer utilizes the multilayer insulated wire. The multilayer insulated wire can realize such high heat resistance as heat resistance F class (155 DEG C.), which satisfies IEC 950 standards, or higher heat resistance, in transformers; and can exhibit excellent electrical properties even at high frequencies. Further, when the transformer is used at high frequencies, the electric properties are not lowered, and influence by the generation of heat can be prevented.
Description
technical field [0001] The invention relates to a multilayer insulated wire with more than two insulating layers and a transformer using the insulated wire. More specifically, the present invention relates to a multilayer insulated wire which is excellent in heat resistance and high frequency characteristics, and which is used for lead wires and windings in transformers included in electronic / electrical equipment and the like. The invention also relates to a transformer using the multilayer insulated wire. Background technique [0002] For example, the structure of the transformer is specified in the IEC standard (International Electrotechnical Communication Standards, International Electrotechnical Communication Standards) pub.950. For example, these standards stipulate that in the winding, the paint film of the coated conductor is not considered as an insulating layer; an insulator with a specified thickness, or a thicker insulator is inserted bet...
Claims
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IPC IPC(8): C08L79/08C08L81/06H01B3/30H01B3/42H01B3/44H01B7/02H01F27/28H01F27/32
CPCH01F27/323H01B3/301H01B3/427H01B7/02
Inventor 东浦厚小林勇千田尚之森邦彦
Owner FURUKAWA ELECTRIC CO LTD