Modeling and performance of slip energy recovery induction motor drives

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Abstract
This program can be used to examine the transient performance of slip energy recovery drives for the proper rating of semiconductor devices or to examine the effects of faults on the associated power system on the drive performance. Current and speed controllers designed using linear techniques can be evaluated using this program as well. A computer using a fourth-order Runga-Kutta integration routine has been developed that uses a newly proposed model to predict the detailed operation of a slip energy recovery drive both in the transient and in the steady state. The hybrid model is between the well-known d, q and the phase variable models and retains the actual rotor states. This makes it possible to include the rectifier commutation impedance without any difficulty. The harmonics of the rectifier and inverter are not neglected, as was often done in the literature. Variables such as the DC link current, rotor phase current, stator current, and inverter recovered current were predicted accurately. Commutation overlap was incorporated into the model and predicted accurately, both in the steady-state and transient conditions.

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