Study of slip energy recovery of induction motor drive using Matlab/Simulink

The induction motor drive, considering its significant industrial applications, has great importance. Squirrel cage IM are generally controlled by varying voltage and frequency fed to the motor. For high power drive, because of use of forced commutation converters, squirrel cage IM have less application. In this case and particularly when load torque is proportional to high order of speed, the wound rotor IM is used. In these motors speed is controlled by energy absorption from the rotor and returning it to network. Return of slip energy to the network improves efficiency, but small power factor and harmonic injection remain predominant problems in this drive system. In this paper a slip energy recovery method is studied by dynamic modeling. To study the slip energy recovery system and the effect of the method on harmonics, power factor, torque-speed characteristic and overall performance of the drive, a block set is implanted in the Matlab/Simulink environment.