Analysis of induction motor drive using SPRS based on GTO/IGBT buck-boost chopper topologies

Slip power recovery scheme (SPRS) is a method of speed control of wound rotor induction motor (WRIM) in which some amount of rotor recovered power is feedback to main supply instead of wasting it in the rotor resistance. The various types of chopper topologies utilized for SPRS are buck, boost, and buck-boost chopper and type of semiconductor technology employed for switching devices i.e. Silicon controlled rectifier (SCR), gate turned off thyristor (GTO), metal-oxide semiconductor field effect transistor (MOSFET), insulated gate bipolar transistor (IGBT). This paper presents the analysis of induction motor drive employing SPRS based on GTO/IGBT buck-boost chopper and IGBT based pulse width modulated voltage source inverter. The analysis of various performances of induction motor drive has been carried out using two chopper topologies i.e. GTO and IGBT. The simulink/MATLAB toolbox has been used to develop the model of WRIM using GTO/IGBT chopper and PWM VSI. The effect of duty cycle on stator current, rotor current, speed, electromagnetic torque, DC link current, supply current, source reactive power, supply power factor, and THD have been investigated. The simulation results have shown that the chopper topology utilizing IGBT has superior performances compared to GTO.