| 摘要 |
A motor of the present invention includes a stator in which a coil is wound around a stator core, and a magnetic circuit unit having a rotor. The rotor holds a rotor magnet disposed facing the stator core and a sensor magnet for position detection with a rotation shaft in the center. The motor further includes an electronic circuit unit having a circuit board on which circuit components including a magnetic detection element are mounted, and a partition disposed between the magnetic circuit unit and the electronic circuit unit for separating their spaces. The motor has an auxiliary sensor magnet disposed facing the sensor magnet with the partition and the magnetic detection element in between. The auxiliary sensor magnet is fixed and supported by a rotatable auxiliary shaft disposed independent from and coaxial with the rotation shaft. |
