DC Motor Speed Control

Product Description

DC Motor Speed Control

DC Motor Speed Control 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 over current 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. DC Motor Speed Control is supplied with a machine set consisting of a dc permanent magnet motor, a dc tacho generator, an encoder and a manual shoe brake. Power: 48 Vdc, 5 A. Tachometric signal: 180 V at 3000 rpm. Power supply: single-phase from mains.

With DC Motor Speed Control, the student will be able to study the following:

Open loop speed control

Closed loop speed control

Use of the PLC for the speed measuring

Acceleration and deceleration ramps programming

Duty cycle monitoring