| 摘要 |
PROBLEM TO BE SOLVED: To reduce the diameter of the magnet of a facing type brushless motor, improve its responsiveness and reduce its power consumption. SOLUTION: An annular recessed trench 35 which is loaded with ballancing weights in order to adjust the balance of a rotor 34 is formed in the inner circumference part of a driving magnet 33. As it is not necessary to extend a yoke 32 and form the recessed trench 35 in the outer circumference part of the driving magnet 33, the diameters of both the driving magnet 33 and the yoke 32 can be reduced. Further, as the recessed trench 35 is provided in the inner circumference part where the torque is not generated by the driving magnet 33, the diameter of the driving magnet 33 can be reduced while sufficient driving torque is maintained. |
