| 摘要 |
PURPOSE:To suppress a type of cogging torque caused by total torque as low as possible in a polyphase DC spindle motor equipped with an anti-vibration means for rotor shaft. CONSTITUTION:Among coils 13W, 13V arranged on the inflated part 12a of a yoke plate 12, current flowing through the coil 13W for a specific phase is increased appropriately as compared with the current flowing through the other coil thus suppressing a type of cogging torque caused by total torque produced through the coils 13W, 13V. |
