Transistor Characteristic Apparatus Experiment, Physics instrument, general laboratory equipment manufacturers.

D.C Motor Speed Controller

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D.C Motor Speed Controller

D.C Motor Speed Controller

D.C motor Speed control trainer 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 photo diode 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.


  • Closed loop motor speed control with eddy current brake
  • Compact system-no mechanical hassles
  • Photo diode speed sensor
  • Digital speed display


01 Speed control of a 12V,4W permanent magnet D.C. motor
02 Speed range : 0 to 2500 rpm (typical)
03 Photo diode based speed sensing
04 4-digit speed display in rpm
05 Electronic tacho generator for feedback
06 Separate unit for motor in a see through cabinet
07 Smooth, non-contact eddy current brake for loading
08 Built-in 3½ digit DVM for signal measurements
09 Built-in IC regulated internal power supply
10 The unit is operative on 230V ±10% at 50Hz A.C. Mains
11 Adequate no. of patch cords stackable from rear both ends 4mm spring loaded plug length 50cm.


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