DC Speed Control System

We offer D.C. Speed Control system usefull in control laboratory experiment. 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. An important feature of the unit is the built-in absolute speed measurement through optical pick-up from a slotted disk followed by a frequency counter. Variable loading of the motor is achieved by a built-in eddy current brake.
Highlights
>>Closed loop motor speed control with eddy current brake
>>Compact system-no mechanical hassles
>>Opto electronic 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 3.5 digit DVM for signal measurements
>>Built-in IC regulated internal power supply
>>110V +-10%, 60Hz mains operation
>>Supporting literature and patch cords included
>>Essential accessory – a CRO
The experiment is complete in all respect, except a CRO.