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A new fuzzy logic-based controller design method for DC and AC impressed-voltage drives

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3 Author(s)
Cupertino, F. ; Dipt. di Electrotecnica ed Elettronica, Politecnico di Bari, Italy ; Lattanzi, A. ; Salvatore, Luigi

This paper deals with the design of fuzzy logic-based controllers (FLBC) for DC and AC electric drives. Industrial drives employ the cascaded PI control with a subordinated current control loop to make sure that the current does not exceed the admissible value and improve dynamic performances. The nonlinear FLBC characteristics permit one to achieve the performances of the cascaded control using only one control loop. This is feasible by a suitable choice of the scaling factors together with the rules of the fuzzy controller. The authors propose a minimum number of rules and the criteria, based on physical considerations, to determine the input and output gains instead of using the trial and error procedure. The designed FLBC is able to control the speed of a DC drive as well as the rotor speed and flux of a vector-controlled induction motor drive. Computer simulations show the effectiveness of the new fuzzy-controller design method. The reduced number of rules and membership functions and the application flexibility together with the possible implementation on low cost μPs lead the authors to think that the proposed tuning criteria will be widely adopted

Published in:

Power Electronics, IEEE Transactions on  (Volume:15 ,  Issue: 6 )

Date of Publication:

Nov 2000

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