Fuzzy Technique based Chopper Control for Slip Energy Recovery System with Twelve-Pulse Converter

  • Tunyasrirut, S. (Faculty of Engineering and Research Center for Communications and Information Technology King Mongkut's Institute of Technology Ladkrabang) ;
  • Ngamwiwit, J. (Faculty of Engineering and Research Center for Communications and Information Technology King Mongkut's Institute of Technology Ladkrabang) ;
  • Furuya, T. (Kitakyushu National College of Technology) ;
  • Yamamoto, Y. (Kumamoto National College of Technology)
  • Published : 2004.08.25

Abstract

This paper introduces the modified slip energy recovery system in order to improve its power factor and to reduce harmonics of line current waveforms. Twelve pulse line commutated converter with the chopper type IGBT is applied where the chopper is applied across the DC terminal and the chopped DC is fed to the converter operating as an inverter and then passed through the wye-wye and delta-wye transformer circuit. This scheme leads to be able to adjust the speed of the motor by the duty cycle of the chopper operating in PWM mode. The fuzzy logic controller is also introduced to the modified slip energy recovery system for keeping the motor speed to be constant when the load varies. The experimental results in testing the 0.22 kW wound rotor induction motor from no-load condition to rated condition show the effectiveness of the proposed control scheme.