China supplier NdFeB Permanent Magnet Rare Earth neodymium magnets

Voice coil motor (VCM) is a special form of direct drive motor that can directly convert electrical energy into linear motion mechanical energy. The principle is to put a cylindrical winding in a uniform air gap magnetic field, and the winding generates a magnetic field. , Drive the load equipment to make linear reciprocating motion, change the strength and flow direction of the current, can change the size and direction of the magnetic field, and change the linear motion frequency and distance of the load equipment. 

VCM has the advantages of high response, high speed, high acceleration, simple structure, small size and convenient control. VCM is a core component in hard disk drive (HDD). HDD is the most commonly used peripheral device used to store information in computer systems. The HDD mainly includes a spindle motor and a head positioning device. The spindle motor has two functions: one is to drive the disk to provide sufficient air buoyancy to allow the head to fly on the surface of the disk; the second is to rotate the sector to be accessed to the side of the head so that the head can read and write on the surface of the disk. Information. The head positioning device includes the VCM, the arm actuator, and the head (Head assy) itself. The function of voice coil motor is head positioning, so it is also called "head positioning motor".

Voice coil motors are mainly used in small stroke, high speed, high acceleration motion, suitable for use in small spaces. In addition to being used in HDDs, common applications include autofocus drive devices in mobile phone cameras. VCM magnets mainly use sintered NdFeB magnets and bonded NdFeB magnets, mainly products of 42M, 45M, 45H, 48M and other brands. 50M, 52M, 48H also occupy a certain market share.

Thank you for reading our article and we hope it can help you to have a better understanding of the most commonly used rare earth neodymium magnets. If you want to learn more about neodymium magnets, we would like to advise you to visit BEARHEART Magnets for more information. 

We can provide high-quality permanent magnets like neodymium magnets, ferrite magnets and magnetic assembly at a very competitive price. Any inquiries and orders are welcomed.