A Fuzzy-Based Controller of a Modified Six-Phase Induction Motor Driving a Pumping System

This study presents the implementation and analysis of the modified six-phase induction motor (IM) that drives a centrifugal pumping system. The three-phase IM is modified to operate as a six-phase IM to enhance the torque pulsation and to increase the motor reliability. Dynamic models of six-phase IM are derived. A fuzzy-based procedure for fine-tuning of the PID controller parameters is proposed in order to sustain the motor speed at the predefined reference values. Added to that, a six-phase low-pass filter is designed to eliminate the undesirable harmonics contents. An optimized PID controller accomplished with a scalar V/f closed-loop six-phase induction motor control is presented and its simulation results are discussed. Pulse width modulation (PWM)-based simulation studies were employed for six-phase induction motor using MATLAB/SIMULINK software. The simulation results show that the PWM inverter reduces the THD for current and voltage waveforms and the overall performance of the modified six-phase IM is enhanced compared with the equivalent three-phase induction motor.