Torque in 3 phase induction motor
Torque in a 3 phase induction motor is determined by three key factors: Firstly the magnitude of rotor current, secondly the flux which interact with the rotor of three phase induction motor and is responsible for producing emf in the rotor part of inuction motor, lastly the power factor of rotor of the three phase induction motor. By integrating these factors, we derive the torque equation as follows: Where, T is the torque produced by the induction motor, φ is flux responsible for producing induced emf, I 2 is rotor current, cosθ 2 is the power factor of rotor circuit. The flux φ produced by the stator is proportional to stator emf E 1 . i.e φ ∝ E 1 We know that transformation ratio K is defined as the ratio of secondary voltage (rotor voltage) to that of primary voltage (stator voltage). Rotor current I 2 is defined as the ratio of rotor induced emf under running condition , sE 2 to total impedance, Z 2 of rotor side, and total impedance Z 2 on ...