What equipment are servo motors, linear motors, voice coil motors, and direct drive motors generally used in? Please say some details, thank you!

Simple answer, in fact, are motors, theoretically can be replaced, just supporting accessories will be different, mainly on the function of the difference, precision and speed of the difference. Servo motors are generally supporting the use of grating (measuring) scale, travel positioning accuracy requirements of high machine use, linear motors are linear motors, with linear guides, ball screws, speed is generally adjustable at several levels. Voice coil motor is actually a linear motor, because the shape of the horn only, short stroke, high precision and high frequency, mainly aviation, medical parts processing. As for the direct-drive motor is basically now the washing machine special motor, high-power direct-drive motor can also be used in vibration equipment.