1. DC servo motor is divided into brush and brushless motor.
Brush motor has the advantages of low cost, simple structure, large starting torque, wide speed regulating range, easy control, need maintenance, but not convenient maintenance (carbon brush), electromagnetic interference and environmental requirements. Therefore, it can be used in cost sensitive common industrial and civil situations.
Brushless motor is small in size, light in weight, large in output, fast in response, high in speed, small in inertia, smooth in rotation and stable in torque. Complex control, easy to realize intelligent, its electronic commutation mode is flexible, can be square wave commutation or sine wave commutation. Motor maintenance-free, high efficiency, low operating temperature, little electromagnetic radiation, long life, can be used in a variety of environments.
2. Ac servo motor is also brushless motor, which is divided into synchronous and asynchronous motors. At present, synchronous motors are generally used in motion control. Large inertia, low maximum rotational speed, and decreases rapidly with the increase of power. Thus suitable for low speed and smooth operation applications.
3. The rotor inside the servo motor is a permanent magnet, and the U/V/W three-phase electricity controlled by the driver forms an electromagnetic field. The rotor rotates under the action of the magnetic field, and the encoder of the motor feeds back signals to the driver. The precision of the servo motor is determined by the precision of the encoder (number of lines).
Post time: Apr-13-2023
