The Furukawa Electric Co., Ltd.

Furukawa Magnet Wire Co., Ltd.

Satoshi Naka

Daisuke Muto

Hideo Fukuda

Makoto Oya

Keiichi Tomizawa

An insulated wire, containing: a conductor; a foamed insulating layer; and an unfoamed filled layer on the outer circumference of the foamed insulating layer, in which the filled layer contains a partial discharge resistant material, which insulated wire has all of high partial discharge inception voltage, resistance to partial discharge, heat resistance, and abrasion resistance (scratch resistance).

Insulated wire, electrical equipment, and method of producing an insulated wire

An inverter surge-resistant insulated wire, having at least one baked enamel layer around the outer periphery of a conductor, and an extrusion-coated resin layer at the outside of the baked enamel layer, wherein a total thickness of the baked enamel layer and the extrusion-coated resin layer is 50 &#x3bc;m or more, a thickness of the baked enamel layer is 60 &#x3bc;m or less, and a thickness of the extrusion-coated resin layer is 200 &#x3bc;m or less, wherein the minimum of tensile elastic modulus of the extrusion-coated resin layer at a range of 25 to 250&#xb0; C. is 100 MPa or more, wherein a dielectric constant of an insulation layer having a combination of the baked enamel layer and the extrusion-coated resin layer is 3.5 or less at 25&#xb0; C. and 5.0 or less at 250&#xb0; C., and wherein a relation between dielectric constant (&#x2208;1') of the baked enamel layer at 250&#xb0; C. and dielectric constant (&#x2208;2&#x2032;) of the extrusion-coated resin layer at 250&#xb0; C. satisfies (&#x2208;2&#x2032;/&#x2208;1&#x2032;)&#x3e;1.

Growing community of inventors

Tokyo, Japan

Satoshi Naka