By analyzing relation between BEMF of the hard disk spindle motor and the rotate speed. This paper presents a new method of following the motor rotate speed by PLL to lock BEMF.
通过对硬盘主轴马达的反电动势与马达转速之间关系的分析，提出一种利用马达的反电动势信号跟踪马达转动速度变化，产生系统伺服写入时钟信号的方法。
The work spindle get four-grade rotate speed, which is driven by a couple of two-grade v-belt pulley.
由一对两级三角皮带轮传动工件主轴，使其获得四级转速；
When running, the motor drives the spindle and the power wheel to rotate speed.
运转时，电机带动主轴及动力盘高速旋转。
When running, the motor drives the spindle and the power wheel to rotate speed.
运转时，电机带动主轴及动力盘高速旋转。
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