HYBRID CONTROL STRATEGIES FOR SOLID-SMOOTH STATOR AND ROTOR IN SYNCHRONOUS RELUCTANCE MACHINES: A VECTOR CONTROL AND FUZZY LOGIC APPROACH

Abstract

This article is devoted to hybrid control (both conventional and intelligent) of a reluctance synchronous machine with solid, smooth stator and rotor. First, a nonlinear model of the machine was developed based on Park's transformation, which accounts for the damping effects due to the solid rotor. Subsequently, an initial vector control strategy (both direct and indirect) was created to maintain a constant saturation level in the machine. This strategy, which keeps the stator direct current at a high value, linearizes the machine's model, enabling it to be controlled like a DC machine.

      Additionally, a second intelligent control strategy using fuzzy logic was applied to the machine, following modal equivalence in synthesizing a fuzzy controller of the PI type. Finally, a comparison between the two control strategies was conducted. A numerical simulation of the variable reluctance machine, powered by a PWM voltage inverter and controlled by the developed strategies, was performed. The results of this simulation are presented and discussed at the end of this article.