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Abstract The acceleration transient torque of the balanced three phase induction motor operating from a balanced supply of fixed formulation of the induction motor dynamics and the efficiently of the method for solving the dynamic equation has beer assessed the modal approach is presented as a comprehensive farm work around which the numerical result are systematically switching are unified the proem of predicting the torque transient in three phase induction motor under condition of non simultaneous switching of the supply of the formulated. Detailed attention is given to the identification of the physical modes and to understanding their behavior changes as a function of motor speed the m.m.f spaces vector viewpoint is presented to give a description of the air gap magnetic field interaction in the production of transient torque and the possibility of super-sychomous speeds during transient. A particular solution giving the transient torque has been obtained by computer simulation using matlab- simulink also stress analysis for an existing case study for a three phase induction motor shaft and show many times it is started before breaking is performed complete modeling analysis and simulation for the double cage induction motor are given applying non simulations switching techniques on it the corresponding results are recorded. |