1. The servo is mainly positioned by pulses. Basically, it can be understood in this way that when the servo motor receives one pulse, it will rotate the angle corresponding to one pulse to realize displacement. Because the servo motor itself has the function of sending pulses, the servo motor Each time the motor rotates by an angle, it will send out a corresponding number of pulses, which echoes the pulses received by the servo motor, or is called a closed loop. In this way, the system will know how many pulses are sent to the servo motor and how many are received at the same time. The pulse comes back, so that the rotation of the motor can be precisely controlled, so as to achieve precise positioning, which can reach 0.001mm.
DC servo motor specifically refers to DC brushed servo motor - the motor has low cost, simple structure, large starting torque, wide speed regulation range, easy control, and requires maintenance, but it is easy to maintain (replacement of carbon brushes), which will generate electromagnetic interference, The environment is demanding. Therefore, it can be used in cost-sensitive general industrial and civil applications.
The DC servo motor also includes the DC brushless servo motor - the motor is small in size, light in weight, large in output, fast in response, high in speed, small in inertia, smooth in rotation, stable in torque, and limited in motor power. It is easy to realize intelligence, and its electronic commutation method is flexible, which can be square wave commutation or sine wave commutation. The motor is maintenance-free and has no carbon brush loss, high efficiency, low operating temperature, low noise, small electromagnetic radiation, long life, and can be used in various environments.
