DSP-based fuzzy logic controller for VSI-fed vector controlled AC motors

The paper deals with the fuzzy logic control(ler) (FLC) application to the vector controlled AC motor drive. The aspects of major importance in the application to vector controlled AC motor drives are pointed out and discussed. The rule base can be easily built using the general dynamics of the process, and than readily updated to contain the delayed information for reducing the dead-time effects of the process. A good performance can be achieved both in transient state and steady state without using of multi-decision tables. A FLC field-oriented drive was designed, simulated and experimented in a speed control loop. The results are compared with those obtained on the same drive with conventional digital PI type speed controller. The paper concludes the applicability of FLC in AC drives in given condition and suggest some future perspective.