Description The function of servo amplifier is to compare, operate and amplifier the input voltage signal with the systems feedback voltage signal, and then output an current signal to the torque motor of the servo valve, finally control the valve core and limit the amplitude to protect valve.

Application SVA series servo motor drives are specially used for driving and controlling electro-hydraulic servo valves. The servo amplifiers are mainly for high accuracy controlling of electro-hydraulic servo valves like nozzle flapper servo valves, jet pipe servo valves, etc.
In a hydraulic system, it is possible to control physical parameters, like position, speed, acceleration and force by using various hydraulic devices and measuring sensors. For example: Valve-controlled cylinder, valve controlled motor, valve-controlled pumps, etc.