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Dry goods‘ Abstract: servo motor refers to the engine that controls the operation of mechanical components in the servo system. It is an indirect speed change device of auxiliary motor. The servo motor can control the speed and position accuracy very accurately, and can convert the voltage signal into torque and speed to drive the control object

servo motor refers to the engine that controls the operation of mechanical components in the servo system. It is an indirect speed change device of auxiliary motor. The servo motor can control the speed and position accuracy very accurately, and can convert the voltage signal into torque and speed to drive the control object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator, and has the characteristics of small electromechanical time constant, high linearity, starting voltage, etc. it can convert the received electrical signal into the angular displacement or angular speed output on the motor shaft to improve the efficiency. It is divided into two categories: DC and AC servo motors. Its main feature is that when the signal voltage is zero, there is no rotation phenomenon, and the speed decreases uniformly with the increase of torque

servo motors are widely used in various control systems, which can convert the input voltage signal into the mechanical output on the motor shaft, and drive the controlled components, so as to achieve the purpose of control

the servo motor can avoid water leakage; DC and AC; The earliest servo motor was a general DC motor. When the control accuracy was not high, the general DC motor was used as the servo motor. In terms of structure, the current DC servo motor is a low-power DC motor. Its excitation mostly adopts armature control and magnetic field control, but it usually adopts armature control

according to the classification of rotating motors, DC servo motors can well meet the requirements of the control system in terms of mechanical characteristics. However, due to the existence of commutators, there are many shortcomings: sparks are easy to be generated between commutators and brushes, which interfere with the operation of the driver, and cannot be used in occasions with combustible gases; There is friction between the brush and the commutator, which will produce a large dead zone

complex structure and difficult maintenance

AC servo motor is essentially a two-phase asynchronous motor when exploring the new development path of plastic granulator technology. There are three main control methods: amplitude control, phase control and amplitude phase control

generally, the speed of the servo motor is required to be controlled by the applied voltage signal according to the force speed required by the experiment; The speed can change continuously with the change of the applied voltage signal; The response of the motor should be fast, the volume should be small, and the control power should be small. Servo motors are mainly used in various motion control systems, especially servo systems