| 摘要 |
PURPOSE:To reduce the weight of a rotary section, and to improve the follow-up properties of frequency by fitting a field pole to an outer rotor, dividing a cylindrical yoke supporting the field pole into two in the radial direction and using the outer section of two sections as a stator. CONSTITUTION:An armature 32 is installed to a shaft 30 coupled with a main motor as an inner rotor while field poles 36 are mounted to a cylindrical yoke 34 as an outer rotor. In this case, the yoke 34 is divided into two, shaping a slight air gap 38 in the radial direction, an inner section 34a is constituted rotatably as the outer rotor, and an outer section 34b is separated and fixed as a stator. According to such constitution, the weight of a rotary section is reduced largely, and frequency constant controllability keeping frequency constant can be improved.
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