Four Quadrant Converter Operations for a DC Motor from Personal Computer

摘要

In this paper a software program is developed through which all four quadrant chopper operations are achieved for a dc motor via a personal computer (PC). The method described is an integrated, automated and efficient control, where all the operations are possible interactively. A software program has been developed here in assembly language in C environment to generate the controllable switching signals for precise operations. These signals are suitable for the triggering operation of four power electronic switches of the chopper. The program was compiled and run, the switching signals were interfaced, and the chopper drive was run successfully. The minimum hardware requirement for the control circuit leads it to a more reliable system. A user friendly control room method has been adopted using the keyboard for smooth speed control of the motor and also for the forward reverse, regenerative braking and emergency stop operations.