A fuzzy logic controller based indirect field-oriented induction motor drive system

The paper presents simulation and experimental results obtained from an indirect fuzzy vector controlled induction motor drive under varying operating conditions like step change in speed command and step change in torque command. The superiority of fuzzy controller over conventional controllers in handling nonlinear system such as an induction motor has been effectively demonstrated by comparing the response of the drive system using fuzzy controller with that using a PI controller. The drive system is implemented with a Pentium PC, which uses a high performance data acquisition card for current/speed sampling and to generate the appropriate signals for the control of inverter switches. The present work exploits the advantages offered by a PC based implementation such as user friendliness, ease of programming and minimal amount of hardware circuitry required.