Abstrakt

PI Controller and Fuzzy Logic Controller based Loss Minimization Techniques for Induction Motor Drives

Rahul Joge, A. S. Sindekar

This paper presents loss minimization techniques for a variable speed, three-phase, squirrel-cage, indirect vector controlled induction motor drive that minimizes total losses and optimizes efficiency through optimal control using proportional plus integral (PI) and fuzzy logic controller. Loss minimization is obtained by proper designing of appropriate controller. Three phase stator current of an induction motor with d-q co-ordinates is referred to the hysteresis band current controller for pulse width modulation. This transformation results in reduction of output voltage obtained from the three phase voltage source inverter and applied to the stator input terminals of induction motor drive, thus the decomposition into d-q components in the steady-state motor model can be utilized in deriving the reduced motor losses. The drive system is simulated using Matlab/Simulink models and simulation results based on total losses and efficiency are compared with changing load torque.