| 摘要 |
PURPOSE:To reduce torque ripples of a motor by forming uneven outer peripheral shape of a rotor magnet formed integrally with a multipolar magnet in a ring shape, thereby forming the output waveform of a position detector in in sinusoidal shape. CONSTITUTION:A rotor magnet 14 is supported by a rotor yoke 11 which is secured to a rotor shaft 10. This magnet 14 is magnetized in multipoles, and uneven outer periphery is formed corresponding to the number of magnetized poles. A stationary armature coil is disposed axially oppositely to the magnet 14, and a position detector which detects the rotating position of the rotor is further provided. The output signal of the position detector is amplified and is applied to an armature coil, thereby rotating the rotor magnet 14. |
