| 摘要 |
PURPOSE:To suppress the temperature rise of a coil when the speed of a motor for a fan is adjusted by forming a stator core of the motor by providing a heat sink fin on the outer periphery of the core by alternately laminating iron plates different in length thereof in outer sizes respectively. CONSTITUTION:A stator core 1 of a motor or the like for a fan which is adjusted at a speed is formed by providing a cooling fin 5 which has a space 4 of the thickness of an iron plate 2 having a profile of long lateral size at the outer periphery of a stator core 1 by alternately laminating the plate 2 and an iron plate 3 having slots of the same shape and a profile of long longitudinal size. Accordingly, the heat sink area of the surface of the core 1 is increased to improve the heat sink performance, the temperature rise of a coil can be remarkably reduced even in a weak notch operation at the speed ajusting time, and the size of the motor can be reduced. |
