DSP Based Implementation of Hybrid Speed Controller for Vector Controlled Permanent Magnet Synchronous Motor Drive

This paper presents a digital signal processor (DSP) based implementation of a hybrid of fuzzy logic controller (FLC) and proportional-integral (PI) speed controller for vector controlled (VC) permanent magnet synchronous motor (PMSM) drive. The fuzzy membership function is used for the hybrid combination of these two FLC and PI speed controllers in such a way that during the time of dynamic conditions such as starting, the degree of belonging for FLC speed controller is higher than the PI controller and near the set point the degree of belonging of PI controller is having higher weightage. The simulation model of the PMSM drive system is developed in MATLAB environment with Simulink and PSB toolboxes to analyze the performance of the proposed drive system. The hybrid speed controller is found suitable for vector controlled PMSM drive in giving the high level of performance while maintaining the excellent response at the time of starting, speed reversal, load perturbation and steady-state operation of the drive