Servo motors are divided into DC and AC. The earliest servo motors are general DC motors. When the control accuracy is not high, general DC motors are used as servo motors. Structurally, DC servo motors are small-power DC motors. Their excitation mostly adopts armature control and magnetic field control, but usually adopts armature control.




Torque motors have the characteristics of low speed and high torque. Generally, AC torque motors are often used in the textile industry, and their working principle and structure are the same as those of single-phase asynchronous motors.

The switched reluctance motor is a new type of speed-regulating motor with an extremely simple and sturdy structure, low cost, and excellent speed regulation performance. It is a strong competitor to traditional control motors and has strong market potential.



DC motors have the advantages of good speed regulation performance, easy starting, and load-bearing starting. DC motors are still widely used, especially after the emergence of thyristor DC power supplies.




Synchronous motors are mainly used in large machinery, such as blowers, water pumps, ball mills, compressors, rolling mills, and small and micro instruments and equipment or as control elements. Among them, the three-phase synchronous motor is its main body. In addition, it can also be used as a phase regulator to transmit inductive or capacitive reactive power to the power grid.