AC Motor Torque Speed Study, ACT-01

Product Description

Introduction:

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.

Experiments

• Torque-speed characteristics by mechanical loading
• Electrical power input at various loads
• Torque constant, speed regulation and efficiency determination

Features and Specifications

• Study of a 12V, 0.5A permanent magnet dc motor
• Friction grip type (Prony Brake) adjustable loading arrangement
• Load cell based force measurement with 3-digit display
• 4-digit speed display in rpm
• Volt/Ampere motor power readout on DPM
• Supporting user manual with all details of the experiment
• Compact unit with no additional accessories required