As we all know, hard disk is one of the main computer storage media, can be divided into mechanical hard disk, solid state hard disk and hybrid hard disk three categories. 

    Among them, mechanical hard disk belongs to the traditional hard disk, but also we are particularly familiar with the type of hard disk. It consists of one or more aluminum or glass magnetic disks, heads, spindles, control motors, head controllers, data converters, interfaces and caches. While working, the magnetic head is suspended on a high-speed rotating disc for reading and writing data. 

     Yes, control motor is the core component of mechanical hard disk, can be said to be indispensable, and with the voice coil motor to develop rapidly, voice coil motor has become the mainstream mechanical hard disk control motor.

       There are two motors inside the mechanical hard disk, one is the spindle motor, the other is the voice coil motor, where the voice coil motor is mainly responsible for magnetic head arm movement. Hard disk in the work of the spindle to control the voice coil motor action, so that the head arm accurate tracking. A hard disk voice coil motor is mainly composed of a magnet and a coil. The magnet is generally a whole and is fixed on the hard disk shell. The coil skeleton and the magnetic head arm are generally one, while some coils do not have a skeleton, the magnetic head arm has a bearing, and the coil is positioned between the magnets. When an electric current passes through the coil, the coil can swing flexibly in a fixed direction to drive the motion of the magnetic head arm, the magnetic head arm is also generally equipped with some magnetic head signal processing circuit, the entire circuit, through the flexible PCB to the hard disk main circuit board connection.

       Kunshan is a professional r & D and manufacturer of high performance, high quality linear and swing motion solutions for voice coil motors and linear motors. Our direct drive products with excellent quality and perfect after-sales, has been recognized by many customers. 

       This article was originally published by Kunshan Tongmao Electronics Co. , Ltd. (www.tmmotion.com ) .