Introduction of electro-hydraulic servo valve
The electrical-mechanical converter includes two functions: current-force conversion and force-displacement conversion.
A typical electrical-mechanical converter is a force motor or a torque motor. A force motor is a linear motion electrical-mechanical converter, while a torque motor is an electrical-mechanical converter of rotational motion. The function of the force motor and the torque motor is to convert the input control current signal into an output force or torque proportional to the current, and then the elastic component (spring tube, spring sheet, etc.) is converted into a linear displacement or rotation angle that drives the pilot valve movement. , Make the pilot stage valve position and return to zero. Generally, the input current of a force motor is 150-300mA, and the output force is 3-5N. The input current of the torque motor is 10~30mA, and the output torque is 0.02~0.06N·m. The electrical-mechanical converter used in the servo valve has two structures: moving coil and moving iron