Servo motor
Servo motors are widely used in various control systems. They can convert the input voltage signal into a mechanical output on the motor shaft and drag the controlled components to achieve the purpose of control.
Servo motors are divided into direct current and alternating current. The earliest servo motors are general direct current motors. When the control accuracy is not high, general direct current motors are used as servo motors. Structurally speaking, the DC servo motor is a low-power DC motor. Its excitation mostly adopts armature control and magnetic field control, but armature control is usually adopted.
Stepping motor
Stepping motors are mainly used in the field of CNC machine tool manufacturing. Because stepping motors do not require A/D conversion and can directly convert digital pulse signals into angular displacements, they have always been regarded as the most ideal CNC machine tool actuators.
In addition to the application in CNC machine tools, stepping motors can also be used in other machinery, such as as the motor in automatic feeders, as the motor of general floppy disk drives, and can also be used in printers and plotters.
Torque motor
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.