Permanent magnet dc motors are useful in a large range of applications at small and medium power levels. Their main application area is in battery operated systems like in automobiles, electric vehicles, portable drives and tools and a number of articles of daily use. A basic advantage of these motors is their small size and greater efficiency due to the absence of any field power requirement.
The present unit is designed to study the torque-speed characteristics of the motor by mechanicallyloading 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