Servo motor is widely used in a variety of control systems, the input voltage signal can be converted to mechanical output on the motor shaft, dragging the control element, so as to achieve the purpose of control.
Servo motor has DC and AC, the first servo motor is a general DC motor, in the case of low control accuracy, only the general DC motor is used as servo motor. DC servo motor is a small power DC motor from its structure. Its armature is controlled by armature and magnetic field, but armature control is usually used.
2 、 stepping motor
Stepper motor is mainly used in the field of CNC machine tool manufacturing, because the stepper motor does not need A/D conversion, can directly convert digital pulse signal into angular displacement, so it has been considered as the most ideal executive component of CNC machine tools.
In addition to the application of CNC machines, stepper motors can also be used on other machines, such as motors in an automatic feeder, motors for general floppy disk drives, and also for printers and plotters.
3, torque motor
Torque motor has the characteristics of low speed and strong torque. AC torque motors are often used in textile industry, and their working principle and structure are the same as those of single-phase asynchronous motors.
4 、 switched reluctance motor
Switched reluctance motor (SRM) is a new type of variable speed motor. The structure is simple and firm, low cost and excellent speed regulation performance. It is a powerful competitor of traditional control motors, and has a strong market potential.
5 、 brushless DC motor
Brushless DC motor has good linearity, wide speed range, long service life, convenient maintenance, small noise, no series of problems caused by brush, so this motor has a great application in the control system.
6 、 DC motor
DC motor has the advantages of good speed control, easy starting and load starting, so the application of DC motor is still very wide, especially after the SCR DC power supply appears.
7 、 asynchronous motor
Asynchronous motor has the advantages of simple structure, convenient manufacture, use and maintenance, reliable operation, small quality and low cost. Asynchronous motor is widely used in driving machine tools, pumps, blowers, compressors, lifting winch equipment, mining machinery, light industry machinery, agricultural and sideline products processing machinery and other agricultural and industrial production machinery, household appliances and medical equipment, etc..
It is widely used in household appliances, such as fans, refrigerators, air conditioners, vacuum cleaners, etc..
8. Synchronous motor
Synchronous motor is mainly used in large machinery, such as blowers, pumps, ball mills, compressors, rolling mills, as well as small, micro instruments, or acting as control components. Three phase synchronous motor is its main body. In addition, when the camera is used, the inductive or capacitive reactive power is transmitted to the grid.