AC Servomotors are useful in a large range of control applications at low power levels. These are basically 2-phase squirrel cage induction motors with a high resistance rotor. A basic advantage of these motors is their small size and free movement due to the absence of any commutator and brushes as in dc motors.
The present unit is designed to study the torque speed characteristics of the motor by mechanically loading it with the help of an adjustable friction grip and recording the torque in terms of the force exerted on a load cell. Load cell output is then processed by a well-designed instrumentation amplifier and displayed in gm-cm. Shaft speed of the motor is picked up by a slotted disc/opto-interrupter pair and displayed in rpm.
Main unit has all the necessary circuits and meters while the motor unit, housed in a transparent box, displays the mechanical arrangements.
Features and Specifications