Digital computation of induction-motor transient torque patterns

A general approach to the digital computation of induction-motor transients is outlined and applied to the evaluation of torque/time patterns for a 3-phase induction motor. Results are given for simultaneous and nonsimultaneous connection to the supply terminals at speeds of zero and 90% of synchronous value. These computed patterns are compared with corresponding experimental recordings, and it is suggested that any differences in the torque-peak magnitudes are mainly due to nonrigidity of the rotor.