| 摘要 |
<p>The present invention relates to a coreless motor including a multi-stage rotor and a driving apparatus having the motor. More particularly, the pres ent invention relates to a coreless motor including magnets and coils arrang ed, in multiple stages, to be concentric with a rotary central shaft and a d riving apparatus having the motor. According to an aspect of the present inv ention, a coreless motor including a multi-stage rotor comprises a rotor and a stator. The rotor includes a plurality of cylindrical yokes arranged in m ultiple stages in a radial direction, and a plurality of magnets fixed to th e yokes in the respective stages in such a manner that polarities of the mag nets fixed to the yoke in each stage are changed in a circumferential direct ion of the yoke. Further, the stator includes a plurality of cylindrical arm ature coil assemblies arranged in multiple stages to face the yokes, and eac h armature coil assembly includes a plurality of armature coils. The armatur e coils can be rigidly fixed using an epoxy resin to maintain their rigidity . Thus, the motor can produce power in a highly efficient way since it inclu des the multi-stage rotor and stator. Further, since the motor does not incl ude a core, no cogging torque is produced to prevent the reduction of output torque and the output torque is kept constantto suppress noise and vibratio n.</p> |
