Characteristics and principle of servo motor
The servo motor can be controlled in three modes of torque, position and speed, and can be controlled in a closed loop mode with high control accuracy.Its main features are: when the signal voltage is zero, there is no rotation phenomenon, the rotation speed decreases steadily with the increase of torque, and the rotation inertia is small, which can be used for positioning.
The servo motor can make the control speed and position accuracy very accurate, 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 react quickly. In the automatic control system, it is used as the executive element, and has the characteristics of small electromechanical time constant, high linearity and starting voltage, which can convert the received electrical signals into angular displacement or angular velocity output on the motor shaft.It is divided into two types: dc and ac servo motors. Its main feature is that when the signal voltage is zero, there is no rotation, and the speed decreases steadily with the increase of torque.
Characteristics and principle of torque motor
Torque motor is a kind of motor with torque as the control direction and open loop control mode. It is a special motor with soft mechanical characteristics and wide speed range. It has low speed, high torque, strong overload capacity, fast response and good characteristic linearity.Its main features are as follows: it has soft mechanical properties and can stop the torque. When the load torque increases, it can automatically reduce the speed of rotation and increase the output torque at the same time.