COMPUTER FUNDAMENTALS

Detailed explanation-1: -All VCMs for hard disks use one or two Nd rare earth magnets. Recent miniaturization of hard disk drives has led to miniaturization of VCMs, and rare earth magnets are also required to be smaller and more powerful.

Detailed explanation-2: -A voice coil actuator controls the movement of the read-write head following the principle of electromagnetic attraction and repulsion. The coil wrapped around the trapezoidal voice coil is attracted to the magnets within the steel poled magnet assembly.

Detailed explanation-3: -Voice coil actuators work on the principle of the Lorentz force, which is the force generated when a current-carrying conductor is placed in a magnetic field. In the case of a voice coil actuator, the magnetic field is created by permanent magnets and the conductor is a coil of wire.