The structure and working principle of vcm motor

The concept of a vcm motor is not clear to most people. Some people only know the use of a vcm motor and a camera, but do not understand how it is constructed and how it works. This article provides you with a definite answer. 1. The concept of vcm motor The vcm motor is also called voice coil motor and voice coil motor. Because the principle is similar to that of speakers, it is called voice coil motor. It is a special form of direct drive motor, which has the characteristics of simple structure, small size, fast response, high acceleration, and high speed. The vcm motor has a wide range of applications. It is used in the cameras of laptop computers, webcams, video monitors, scanners, mobile phones and other devices. The main function is focusing, and the most common use of vcm motors is mobile phones. 2. The structure of the vcm motor The structure of the vcm motor of different manufacturers will be different, but each vcm motor is basically composed of a housing, a bracket, a front gasket, a front reed, a magnet, a coil, a carrier, a rear gasket, The rear spring and base are composed as shown in the figure: 3. The working principle of the vcm motor The working principle of the vcm motor is the same as that of the loudspeaker. It works by the left-hand law in physics. The coil is fixed in the magnet group by the upper and lower shrapnel. When energized, the current passes through the coil and the coil generates a magnetic field. The magnetic field of the coil interacts with the magnet, and the coil moves upward. The camera locked in the coil moves when the power is turned on, and when the power is off, the coil returns to the original position under the elastic force of the shrapnel, thus realizing the autofocus function.