STATOR FOR MOTOR AND PROCESS FOR PRODUCING THE SAME

摘要

A stator core for a motor in which iron loss is reduced by improving the magnetization characteristics in low magnetic fields and motor output is enhanced. When the stator made of a non-oriented electric sheet as a raw material is annealed, the stator core is applied, in the cooling process of the heated stator core, with a magnetic field in the exciting direction of the stator of the motor at motor driving within a temperature range from a point immediately above the Curie point to 300°C. Since flux density is increased especially in low magnetic fields, hysteresis loss is reduced and total iron loss of the stator is reduced. In a motor employing that stator core, saturation magnetic flux density is increased under a high frequency exciting current and motor output can be enhanced.