DC Speed Control System

Introduction
We offer D.C. Speed Control System, DCS-201 usefull for control laboratory. Closed loop speed control of dc motor is a common experiment for studying various features of automatic control systems like control, regulation and disturbance rejection. The present unit is designed to demonstrate the working of PWM and SCR based controllers and show the resulting waveforms of the voltage supplied to the motor. Measurement of the timings on the waveforms under various conditions has been suggested to get a good insight into the operation of the system. The experiment is complete with all the sub-systems and a detailed operating literature is included which introduces the basic theory, suggested experiments and an interpretation of the results. An external CRO is all that is needed to view the waveforms and measure the timings.
Highlights
PWM Power Control
SCR Power Control
CRO Display of Waveforms
4-Digit Speed Display in rpm
Contactless Eddy Current Braking
Experiments
Open loop speed control for PWM Controller, with and without load
Open loop speed control for SCR Controller, with and without load
Closed loop speed control for PWM Controller with load
Closed loop speed control for SCR Controller with load
Observation and measurements on the voltage waveforms
Features and Specifications
Speed control of a 12V, 4W permanent magnet d.c. motor
Speed range: 0 to 2000 rpm (typical)
Opto-interrupter based speed sensing
4-digit speed display in rpm
Electronic tachogenerator for feedback
Separate unit for motor in a see-through cabinet
Smooth, non-contact eddy current brake
220V±10%, 50Hz mains operation
Supporting literature and patch cords included
Essential accessory – a CRO
The experiment is complete in all respect except a CRO.