A novel Fuzzy logic based flux weakening speed control for IPMSM drive with variable direct and quadrature axis inductances

This paper presents a novel flux weakening speed control scheme of an Interior Permanent Magnet Synchronous Motor (IPMSM) using Fuzzy logic controller considering variable direct and quadrature axis inductances. The Fuzzy logic controller (FLC) has been designed on the basis of indirect vector control scheme of the IPMSM drive. The complete vector control scheme of the IPMSM drive incorporating the FLC is simulated for a IPMSM using Matlab/Simulink. The performances of the proposed FLC based IPMSM drive are investigated and compared to those obtained from the conventional proportional integral (PI) controller based drive at various dynamic operating conditions, such as, certain change in command speed, step change in load, etc. The comparative results show that the FLC is more robust and, hence, found to be a suitable replacement of the conventional PI controller for the high performance industrial drive applications.