Abstract—In this paper an 8 switch PWM three phase AC chopper is used to control the
stator voltage of a three phase induction motor. Three different control strategies viz.,
keeping the power factor constant, keeping the stator current minimum and keeping the
input power minimum for a given load, are used to operate the induction motor at maximum
efficiency. The results obtained from a closed loop simulation using MATLAB and
experimental validation in open loop, are presented here.
C. K. Ratheesh, Devarajan, A. T., TNP, N., Dr. Sasi K. K., and Isha, T. B., “Operation of Induction Motor at Optimum Efficiency ”, Operation of Induction Motor at Optimum Efficiency, 2009.