DC Speed Control System

We offer D.C. Speed Control System useful for control labs. The present unit, built around a small permanent magnet d.c. motor, is designed to bring out the salient features of such a system. Facilities are available to directly measure the principal performance features of the speed control system, viz., steady state error and load disturbance rejection, as a function of the forward path gain. In addition, the experimental work involves the determination of the motor transfer function and the characteristics of the tachogenerator.
Highlights:
Closed loop motor speed control with eddy current brake
Compact system-no mechanical hassles
Optoelectronic speed sensor
Digital display of speed on the panel
Experiments:
Effect of loading on the speed of the motor in the open loop
Steady state error variation with forward gain
System time constant variation with forward gain
Effect of forward gain on disturbance rejection
Determination of the motor transfer function and tachometer characteristics
Features and Specifications
Speed control of a 12V, 4W permanent magnet d.c. motor
Speed range: 0 to 3000 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 for loading
Built-in 3½ digit DVM for signal measurements
Built-in IC regulated internal power supply
Supporting literature and patch cords included
Essential accessory – a CRO
The experiment is complete in all respect, except a CRO.