What is the principle of voice coil motor mechanical system? The voice coil motor is often sold as a magnet and coil component. The smaller air gap between the coil and the magnet is typically 0.254-0.381 mm, which can be larger than the air gap as needed, except that the range of motion allowed by the guidance system needs to be determined while avoiding friction and collision between the coil and the magnet.

       In most cases, the moving load is connected to the coil, that is, the moving coil structure. Its characteristics are fixed in the magnet system can be relatively large, which can be a strong magnetic field; disadvantage is that the voice coil power transmission line in motion, prone to open circuit problems, but also and sports support, moving parts and the environment is very hot Harsh, the heat generated by the voice coil causes the temperature of the moving parts to rise, so the larger current allowed in the voice coil is smaller. When the load is particularly sensitive to heat, the load can be attached to the magnet, the fixed voice coil structure. The cooling of the structural coil is no longer a big issue, the larger the current allowed by the coil, but a smaller magnet is used to reduce the mass of the moving part and therefore the magnetic field is weaker.

       Linear voice coil motor can be directly driven, and from rotation to linear motion without recoil, there is no energy loss. The preferred guide is a linear bearing or bushing in combination with a hardened steel shaft that can integrate the shaft / bushing into one integral part. It is important to keep the guide system low-friction so as not to reduce the motor's smooth response.

     A typical rotary voice coil motor is a shaft / ball bearing as a guidance system, which is the same as a conventional motor. The movement provided by the rotating voice coil motor is very smooth, making it the preferred device of choice in applications that require fast response, limited angle excitation, such as in a gimbal assembly.

This article originates from Kunshan Tongmao Electronics Co., Ltd. (www.tmmotion.com) original company, please indicate the source.