| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor which achieves improvement of the accuracy of rotor magnet position detection conducted by a magnetic sensor while inhibiting flexure of a shaft during driving of the motor and weight increase of the motor.SOLUTION: A motor 1A includes: a rotation part 3A having a shaft 31A and a rotor 32A; and a stationary part 2A having a stator 23A and a magnetic sensor 241A. The magnetic sensor 241A is positioned above the rotor 32A and detects a rotation position of the rotor 32A. The rotor 32A includes: a rotor core 321A which is a cylindrical lamination steel plate; a rotor magnet 322A having an upper end surface positioned above the rotor core 321A; and a rotor holder 323A which is positioned at the upper side of the rotor core 321A and the radial inner side of the rotor magnet 322A and made of a ferromagnetic material. The rotor core 321A and an outer cylindrical part 61A of the rotor holder 323A face the rotor magnet 322A while contacting with the rotor magnet 322A or through a gap formed therebetween. |
