Power Servo Amplifier for Modulating Actuators

In modem processes the accurate positioning of damper drives and control valves is of prime importance. In order to fulfill these requirements this servo amplifier for the control of a dc motor was developed, resulting in a solid-state SCR output unit capable of being operated over a widerange of ambient and environmental conditions. In addition to high sensitivity and position accuracy,the amplifier can incorporate such features as high over-torque capabilities, torque limiting, speed control, and battery backup for power failure protection.