誘導電流を用いたモータコアのひずみ取焼鈍法の改良

－モータコアの積層と加熱導線配置が温度分布と磁気特性に及ぼす影響－

抄録

　The authors have been proposed a heating method for a motor core with an induced current to develop stress-relief annealing technique for a simple method and short time. In this paper, we examined the influence of lamination and conductor arrangement on the temperature distribution and magnetic properties of the motor core by heating with an induced current. The temperature of the motor core was increased to 600 ^o C by laminating the core. The motor core is heated by inserting a heating conductor in the slot of the motor core, and the temperature difference on the surface of the motor core reduced. In addition, the magnetic properties of the stress-relief annealed motor core in the new heating conductor arrangement was improved at positions in the upper and middle parts in comparison with that of the conventional heating conductor arrangement.