Voice coil motor (Voice Coil Actuator/Voice Coil Motor) is a device that converts electrical energy into mechanical energy and realizes linear and limited swing angle motion.

      Voice coil motor (Voice Coil Actuator/Voice Coil Motor) is a device that converts electrical energy into mechanical energy and realizes linear and limited swing angle motion. A device that uses the interaction between the magnetic poles in the magnetic field from the magnetic steel and the magnetic field generated by the energized coil conductor to generate regular motion. Because the voice coil motor is a non-commutated power device, its positioning accuracy depends entirely on the feedback and control system, and has nothing to do with the voice coil motor itself. With suitable positioning feedback and sensing devices, the positioning accuracy can easily reach 10NM, and the acceleration can reach 300g (the actual acceleration also depends on the condition of the load)

      Whether it is a straight or a swing, their basic principles are the same. When an energized conductor passes through a magnetic field, a force perpendicular to the magnetic field lines is generated. The magnitude of this force depends on the length of the conductor passing through the field, the strength of the magnetic field and the current. The magnitude of the thrust generated by the voice coil motor depends on the design structure and the current strength: F = β*L*I, the relationship between the current and the generated force is reflected in the force sensitivity Kf in the linear voice coil motor, and in the rotary voice coil motor. The torque sensitivity Kt is reflected in the coil motor. In our design, the unit of Kf is defined as N/A, and the unit of Kt is N·M/A.

      The voice coil motor is a simple device that converts electric current into mechanical force, so its positioning and force control are achieved through a position feedback device and a controller, and its accuracy is determined by the controller and has nothing to do with the voice coil motor itself.

      Voice Coil Actuator

      The main components are relatively simple, coils, springs, magnets, and some fixed structures.

      Through the principle that the energized coil is subjected to the force in the magnetic field, the movement is carried out, and the accurate control requires the help of some external components, such as the Drive IC, through the Drive IC to control and output the size and time of the current, thereby controlling the voice coil Actuator needs to reach Location. In the mobile phone, all the control information of the Drive IC is also given by the sensor. The sensor mentioned here is also the Cmos or CCD that we usually refer to. Therefore, it can be simply understood that the Voice Coil Actuator is a device that can only receive current signals.

      Voice coil motors currently include: cylindrical voice coil motor, rectangular voice coil motor, flat voice coil motor, swing voice coil motor, etc.;

      The oscillating voice coil motor is also called the galvanometer motor, and the optical lens is widely used.

      Voice coil motors are mainly used in small stroke, high speed, high acceleration movements, and are suitable for small spaces.

      The autofocus function in common mobile phone cameras is completely completed by the entire driver.