| 摘要 |
An electric wire capable of reducing an AC resistance equal to or less than the copper wire and being easily designed, is provided. An electric wire includes a single layered structure having a first layer of a substance having lower conductivity than copper, or includes a double-layered structure in which a second layer of copper is formed on a periphery of the first layer, wherein a radius of the electric wire is smaller than a skin depth thereof, an alternating current resistance value of the electric wire at a frequency used in the electric wire is provided in excess of a sum of a value obtained by multiplying a direct current resistance value of the electric wire by a ratio of a cross-sectional area of the first layer and an entire cross-sectional area of the electric wire, and a direct current resistance value of a copper wire having a same shape and a same outer diameter as the electric wire. |
