| 摘要 |
<p>A disc drive spindle motor having a stator (130) with nine evenly distributed windings (134) separated by relatively large slot openings, further comprises a rotor (140) having a radially polarized eight-pole magnet (162). The motor of this invention has three phases, the first phase starting at any winding end of the nine windings and incorporates the windings n, n+2 and n+4 connected in series and being wound in the same direction; the second phase starting at the winding n+3, and incorporating the windings n+5 and n+7 connected in series and being wound in the same direction; and the third phase beginning with the winding n+6 and incorporating the windings n+8 and n+1, connected in series and wound in the same direction. The starting points of the three phases are selected to provide the necessary 120 DEG phase shift between windings.</p> |
