Sound coil linear motor Baidu Encyclopedia

The so-called Voice Coil Motor is named after its structure similar to that of the speaker. It has the characteristics of high frequency loudness and high precision. This type of motor is divided into cylindrical ring motor and swing ring motor.
There are many specifications and styles of acoustic motor, whether it is linear or swinging, they have the same basic principle. When an energized conductor passes through a magnetic field, a force perpendicular to the magnetic field line is generated. The size of this force depends on the length of the conductor passing through the field, the strength of the magnetic field and the current. The coil motor converts the actual current into linear thrust or torque, and their size is proportional to the size of the actual current passed.