现在，大多数常用的企业硬盘驱动器(HDD)都受到磁头移动速度、盘片旋转速度和查找延时的限制。
Now, the most commonly used enterprise hard disk drives (HDDs) are limited by the rate of head movement, the speed of the spinning platter, and seek latency.
没有一个性能优良的功率放大器，磁轴承硬盘实现高精度、高转速是不可能的。
Further more, an excellent power amplifier is indispensable to the realization of the high precision and high speed of AMB hard disk.
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。
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.
在硬盘伺服信息写入的过程中要求磁碟转速要非常稳定。
During writing servo information on disk, the disk must rotate very stably.
即使一个硬盘驱动器的转速达到每分钟7200次，甚至更快，仍然比光速慢。
Even though a hard drive spins at 7200 times per minute or even faster, that's relatively slower than the speed of light.
即使一个硬盘驱动器的转速达到每分钟7200次，甚至更快，仍然比光速慢。
Even though a hard drive spins at 7200 times per minute or even faster, that's relatively slower than the speed of light.
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