INSULATED ELECTRICAL WIRE HAVING EXCELLENT RESISTANCE TO BENDING PROCESS, COIL AND ELECTRONIC/ELECTRIC EQUIPMENT USING SAME

摘要

An insulated wire having an insulating coat layer comprising a thermoplastic resin on the outer peripheral surface of a conductor having a rectangular cross-sectional shape and also having a long side, a short side, and a corner portion having a curvature radius Rc, wherein a thickness t1 (µm) of the insulating coat layer covered on the surface which is continuing in an axial direction of the conductor, and which layer includes a long side of a transverse section of the conductor, a thickness t2 (µm) of the insulating coat layer covered on the surface which is continuing in the axial direction of the conductor, and which layer includes a short side of the transverse section of the conductor, and a corner portion thickness t3 (µm) of the insulating coat layer satisfy the relationship of formula (1): t 3 / t 1 + t 2 / 2 ‰¥ 1.2 wherein the t1 (µm) and t2 (µm) are each independently 20 µm or more and 50 µm or less, and wherein a ratio of a cross-sectional area Sc (mm 2 ) of the conductor to a cross-sectional area Sw (mm 2 ) of the insulated wire satisfies the relationship of formula (2) 1.0 Sc / Sw ‰¥ 0.8 ; as well as a coil and an electric or electronic equipment using the same.