Hydrodynamic spindle motor having distributed windings

摘要

A hydrodynamic bearing spindle motor for rotating at least one disc about a central axis in a data storage device comprises a base, a stationary member, a hub, and a stator. A hydrodynamic bearing interconnects the hub with the stationary member such that the hub is rotatable about the central axis. The stator is coaxial with the hub and has at least one stator winding that is distributed about its circumference. The distributed winding attenuates pure tone vibrations which become more noticeable with lower levels of background vibrations in hydrodynamic bearing spindle motors.