Servo motor is widely used in various control systems. It can convert the input voltage signal into the mechanical output on the motor shaft and drag the controlled components, so as to achieve the purpose of control.
Servo motors can be divided into DC and AC. The earliest servo motor was a universal DC motor. In the case of low control accuracy, DC motor is generally used as servo motor. At present, DC servo motor belongs to low-power DC motor in structure, and its excitation mostly adopts armature control and magnetic field control, but armature control is usually used.
2. Step motor
Stepping motors are mainly used in the field of CNC machine tool manufacturing. Because stepping motor does not need A/D conversion, it can directly convert digital pulse signal into angular displacement, so it has always been considered as the most ideal executive component of CNC machine tools.
In addition to the application in CNC machine tools, stepping motors can also be used in other machines, such as motors in automatic feeders, motors in general floppy disk drives, printers and plotters.
3. Torque motor
Torque motor has the characteristics of low speed and large torque. Ac torque motor is usually used in textile industry, and 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, which is extremely simple and firm in structure, low in cost and excellent in speed regulating performance. It is a strong competitor of traditional control motor and has strong market potential.
5: Brushless DC motor
Brushless DC motor has the advantages of good linearity of mechanical characteristics and adjustment characteristics, wide speed range, long life, convenient maintenance, low noise and so on, and there is no series of problems brought by brushes, so this kind of motor has great application in control system.
6: DC car
DC motor has the advantages of good speed regulation performance, easy starting and starting with load, so the application of DC motor is still very extensive at present, especially after the emergence of SCR DC power supply.
7: Asynchronous motor
Asynchronous motor has the advantages of simple structure, convenient manufacture, use and maintenance, reliable operation, small mass and low cost. Asynchronous motors are widely used to drive machine tools, pumps, blowers, compressors, lifting equipment, mining machinery, light industrial machinery, agricultural and sideline products processing machinery, most agricultural production machinery, household appliances and medical devices.
It is widely used in household appliances, such as electric fans, refrigerators, air conditioners and vacuum cleaners.
8: Synchronous motor
Synchronous motors are mainly used in large machinery, such as blowers, pumps, ball mills, compressors, rolling mills, 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 modulator to transmit inductive or capacitive reactive power to the power grid.