LITZ WIRE, LITZ WIRE COIL, AND PRODUCTION METHOD OF LITZ WIRE

摘要

PROBLEM TO BE SOLVED: To provide a litz wire which is suitable for a coil used in a frequency band of 50-150 kHz of a non-contact power feeding system of an electromagnetic induction type.SOLUTION: A litz wire is formed by: intertwining plural primary stranded wires formed by intertwining plural strands for forming a secondary stranded wire; then intertwining plural secondary stranded wires. A cross section of the litz wire has a uniform division structure by the plural secondary stranded wires, and a distance between strands on each division area is 3-15 μm.SELECTED DRAWING: Figure 2