Application of silicon-controlled rectifiers in a transistorized high-response D-C servo system

THE COMMERCIAL introduction of the silicon-controlled rectifier in early 1958 disclosed the possibilities of its use in many applications usually performed by thyratrons, magnetic amplifiers, and rotating amplifiers.1,2 One such application, which so far has not been thoroughly explored, is the use of these rectifiers as the power amplifier in a d-c servo system. This paper presents the results of designing, building, and testing a servo system which incorporates the controlled rectifiers as the power amplifier for the d-c servomotor. The final aim is to evaluate the performance of the controlled rectifier in this application.