REAL-TIME SIMULATION FOR ROBUST CONTROL APPLIED TO ASYNCHRONOUS 3-PHASE INDUCTION MOTOR BASED ON THE PPI CONTROL

Abstract

This study proposes the method of real-time simulation for the field-oriented control (FOC) of an asynchronous - phase induction motor (IM) based on the parallel proportional-integral (PPI) technique, to control the motor speed. The proposed control strategy requires two independent direct controllers for flux and current through the 3 level-cascade inverters with the algorithm of carrier phase modulation (PM). In particular, the stator field-oriented vector control (SFOC) will be chosen rather than the rotor field-oriented vector control (RFOC) caused by the requirement of voltage, current and stator resistance parameters. The result of real-time simulation is provided by applying Sim-Power-Systems of Matlab-Simulink software via RT-LAB compiler and the hardware simulation in hardware in loop (HIL) via OPAL-RT for 1-Hp, 1400 rad/s IM motor. These simulation and experimental results show the robustness of the PPI controller in the presence of parameter variation, such as, the Rs and Rr resistances increasing by 2 times, changing of torque and speed with the appearance of disturbances.