Fuzzy control of AC-DC converters supplying high precision DC drive systems

Author

Florescu, Adriana ; Alexandru, Vasile ; Stoichescu, Dan Alexandru

Author_Institution

Fac. of Electron. & Telecommun., Politehnica Univ. of Bucharest, Romania

fYear

2001

fDate

2001

Firstpage

193

Lastpage

196

Abstract

The paper describes an application of fuzzy set theory in a DC speed control system supplied by an AC-DC converter. The fuzzy control is used to linearize the external characteristics of the converter in discontinuous-conduction mode occurring at light load and/or high speed. The nonlinear characteristics in discontinuous-conduction mode affect the control loop gain. The solution is to linearize the converter´s characteristics, meaning to prolong the characteristic of the continuous-conduction mode over the characteristics of the discontinuous-conduction mode. Algorithms have been developed in detail and verified with MatLab Fuzzy Toolbox. The simulation study indicates that fuzzy control is a good alternative to conventional control methods, being used particularly in nonlinear complex systems which are ill defined or totally unknown

Keywords

AC-DC power convertors; electric drives; fuzzy control; fuzzy set theory; power system control; power system simulation; velocity control; AC-DC converter; AC-DC converters; DC drive systems; DC speed control system; MatLab Fuzzy Toolbox; continuous-conduction mode; control loop gain; converte external characteristics linearization; discontinuous-conduction mode; fuzzy control; fuzzy set theory; nonlinear characteristics; nonlinear complex systems; simulation; AC-DC power converters; Analog-digital conversion; DC motors; Equations; Expert systems; Fuzzy control; Neural networks; Nonlinear control systems; Velocity control; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics Technology: Concurrent Engineering in Electronic Packaging, 2001. 24th International Spring Seminar on

Conference_Location

Calimanesti-Caciulata

Print_ISBN

0-7803-7111-9

Type

conf

DOI

10.1109/ISSE.2001.931053

Filename

931053