摘要:
To produce a large-current-adaptable common-mode coil simply and at low costs. When the drive pulley (76) of a motor (74) is rotated in an arrow B direction after the distance between pins (68, 68) is adjusted to a desired one, a rotary shaft (70) is rotated. This rotation allows a rod-like takeup bobbin (64) to take up a copper wire (60) such as UEW to produce an annular conductor (66) consisting of a specified number of wires. The conductor (66) is removed from the bobbin (64), and one end is rotated with the opposite ends kept pulled from each other to produce a strand. This strand is wound into a troidal coil or the like to produce a large-current-adaptable common-mode coil.