Performances of PI and Fuzzy-Logic Speed Control of Field-Oriented Induction Machine Drives

A proportional-integral and fuzzy-logic speed controllers operating in indirect field-orientation are designed and compared experimentally in this paper, using a 2-HP 3-phase induction machine drive. The speed tracking capability of the two controllers are compared under no-load and various load conditions with different reference speeds. The performances of the drive are also evaluated under sudden electric and mechanical disturbances. Simulation and DSP experimental results on a 2HP 230 V/5.8 A Delta-connected 3-phase induction machine show that the performance of the fuzzy-logic controller is more satisfactory than that of the proportional-integral controller in a number of cases and, hence, can be a suitable candidate for high-performance industrial applications.