Transcription of Torque-Speed Characteristics of Three Phase Squirrel Cage ...
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Torque-Speed Characteristics of Three Phase Squirrel Cage ...
Torque-Speed Characteristics of Three Phase Squirrel CageInduction MotorAimTo obtain the Torque-Speed Characteristics (T-Nr) of a Three Phase Squirrel cage induction motor using1. Variable voltage control2. Variable voltage variable frequency (V/F) controlTheoryAn induction motor compared to a dc motor has some major advantages such as - Absence of brushes,commutator segments, rugged construction, being cheap, lesser maintenance requirements and smallersize for the same power output. Due to these advantages induction machines have become more popularin industrial applications. For any motor load application, it is imperative to know the torque speedcharacteristic of the motor. Consider a Three Phase Squirrel cage induction motor whose stator hasthree windings displaced in space by 120 . When they are excited with currents that are displaced intime by 120 , a rotating magnetic field rotating at a speed called synchronous speedNsis set up.
Torque-Speed Characteristics of Three Phase Squirrel Cage Induction Motor Aim To obtain the torque-speed characteristics (T-N r) of a three phase squirrel cage ... If the rotor of the induction motor rotates at a speed, N r, then the slip, sis de ned by (2). s= N s N r N s (2) The torque developed by the induction motor is given by (3). T= 3! s ...
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