1. Servo motors are widely used in various control systems. They can convert the input voltage signal into the mechanical output on the motor shaft and drag the controlled components to achieve the control purpose.

There are dc and ac servo motors, the earliest servo motor is a general dc motor, in the control accuracy is not high, the use of general dc motor as a servo motor. In terms of structure, dc servo motor is a low-power dc motor. Its excitation is mainly controlled by armature and magnetic field, but usually controlled by armature.

Step motor

Stepping motors are mainly used in the field of nc machine tool manufacturing. Because stepping motors do not need A/D conversion and can directly convert digital pulse signal into angular displacement, they are always considered as the most ideal execution component of nc machine tool.

In addition to its use in CNC machines, stepper motors can also be used in other machines, such as motors in automatic feeder machines, motors in universal floppy disk drives, and printers and plotters.

3. Torque motor

Torque motor has the characteristics of low speed and large torque. Ac torque motor is often used in textile industry. Its working principle and structure are the same as that of single-phase asynchronous motor.

4. Switched reluctance motor

Switched reluctance motor (SRM) is a new type of speed regulating motor with simple structure, strong structure, low cost and excellent speed regulating performance.

5, brushless dc motor

Brushless dc motor mechanical characteristics and regulation characteristics of good linearity, wide speed range, long life, easy maintenance of small noise, there is no brush caused by a series of problems, so this motor has a great application in the control system.

6. Dc motor

Dc motor has the advantages of good speed regulation performance, easy starting and load starting, so the application of dc motor is still very wide, especially after the emergence of silicon controlled dc power supply.

7. Asynchronous motor

Asynchronous motors have the advantages of simple structure, convenient manufacture, use and maintenance, reliable operation, low quality and low cost. Asynchronous motors are mainly widely used to drive machine tools, pumps, blowers, compressors, lifting and winding equipment, mining machinery, light industrial machinery, agricultural and sideline products processing machinery and most of the industrial and agricultural production machinery, household appliances and medical equipment.

In the application of home appliances more, such as fans, refrigerators, air conditioners, vacuum cleaners.