Implementation of an Intelligent Controller for Three Phase Vector Controlled Induction Motor Drive
نویسندگان
چکیده
Induction motor (IM) control has drawn considerable attention in the past decade due to its wide range of application in industry. Vector control allows a decoupled control of electromagnetic torque and the motor flux. In this paper an intelligent control scheme for a three phase vector controlled induction motor drive is implemented using Fuzzy Logic Controller (FLC) and the performance is compared with conventional PI Controller. The rule base of FLC is designed using the speed error and the change in error, which are the two linguistic variables. An FLC embodies human like decision to compensate for uncertainty in parameter variation and non-availability of data. The vector control scheme of the IM drive incorporating PI-Controller and FLC is experimentally implemented using a digital signal processor board DS-1104 in the laboratory on a 3hp Induction Motor. A comparison of the drive performance using conventional and an intelligent controller is presented through simulation studies as well as through real time implementation of the scheme. The objective of the intelligent controller is to maintain the drive speed to the reference speed and enable the drive to provide a fast dynamic performance with smaller tracking error, while controlling the nonlinear dynamics of IM. Keywords–Field oriented control (FOC), fuzzy logic controller (FLC), indirect vector control, intelligent controller, pi controller
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