Description

The system has been designed for the study of programmable logic control techniques in the control of the speed of a separately excited dc motor.

The speed regulation includes two control loops: hardware current loop with overcurrent limiting and speed loop with external PLC control.

Speed measuring with a tacho generator or with an opto-encoder via frequency/voltage converter.

Speed reference set by means of potentiometer or selector switches and under PLC control.

The PI controller modulates the PWM circuit that drives the power stage consisting of switching transistor.

Possibility of acceleration and deceleration ramps programming.

Pointer meters for motor speed, voltage and armature current; connection to PLC through terminals or connectors.