Direct Torque Control of brushless doubly-fed induction machines using fuzzy logic

In this research, a Fuzzy Logic Direct Torque Control (FLDTC) based on stator flux-oriented and machine´s relation and equations with voltage and current of both stators have been introduced. Initially, paper focuses on BDFM concept and development of it. The synchronous mode operation of BDFM will be studied, and then by introducing the d-q coordination, the dynamic equation of BDFM will be represents. Furthermore, this paper devotes a new predictive FLDTC in d-q coordination through a short review of some definitions in Fuzzy. In this method a novel expanded rule bases by twelve stator sectors represented. This algorithm is careless to the priority of flux and torque, and it is easily implemented, and it improves the system performance through decreasing both torque and flux ripples. Finally the simulation results of classic DTC and FLDTC of BDFM are compared, presented and evaluated.