MAGNETIZING METHOD BY OPPOSED TYPE MULTIPLE POLES

摘要

PURPOSE:To realize multiple pole magnetization for a magnet with a coersive force equal to or larger than 3KOe by a method wherein magnetizing poles are arranged opposed to each other inside and outside a cylindrical magnet with a coersive force not smaller than 3KOe. CONSTITUTION:Magnetizing poles 1 and 5, wound with Cu wires 2 and 4, are arranged facing each other, inside and outside a cylindrical magnet 3 with a coersive force not smaller than 3KOe, and the multiple poles composing the magnet 3 are subjected to magnetization. High efficiency is attained when the distance BH between inner and outer yokes is equal to or smaller than the line segment BD, where B, E, H, and L are the midpoints of the line segments AB, DF, GT, and KN along the magnetizing pole surface. The magnet 3 is fully magnetized radially when the distance BH is equal or smaller than the line segment CD. On the contrary, magnetizing efficiency is low when the permeance of the distance BH is smaller than that of the line segment BD.