Abstract
High performance motor drives require high accuracy, fast response, wide range of control, robustness and immunity from the effect of parameter variations. Three phase motors have a complex and highly nonlinear mathematical model associated with interactive parameters. This makes designing a conventional controller for such a system is a hard task. Researchers are paying more attention to fuzzy logic controllers (FLCs) since they can be employed to control complex or nonlinear systems even without knowing their mathematical model. The main task of this paper is to design and implement an FLC for indirect field orientated control of a three phase induction motor drive. The proposed controller is a proportional-derivative (PD) FLC. It uses the speed and its derivative as input and the electromagnetic torque as output. The input and output are coupled with simple linguistic if-then rules. The spread of each input and output is adjusted using a gain block to achieve the best performance in a trial-and-error process. Also, an incremental counter is attached to the output of the controller to yield the desired electromagnetic torque. The design was implemented and tested using MATLAB/SIMULINK. Finally, the simulation results and figures were presented.
Highlights
Vector control techniques have been used widely to control three phase induction motor drives
Designing a PI controller for the induction motor drive is a difficult task since the induction motor model is highly nonlinear, inaccurate and having interactive parameters [5, 6]
This paper investigated the design and implementation of a PD fuzzy logic controller for indirect field orientated control of a three-phase induction motor drive
Summary
Vector control techniques have been used widely to control three phase induction motor drives. Indirect field oriented control is one of the common used vector control techniques. It has the advantage of using only current and speed sensors. FLCs may be used in conjunction with other classical controllers to control induction motor drives. The. FLC, in this case, is used to adapt classical PI or PID controller parameters according to the variations in the controlled system [9]. FLC, in this case, is used to adapt classical PI or PID controller parameters according to the variations in the controlled system [9] It can be used in a standalone form to replace classical controllers [10]. The standalone constantstructure FLC has the advantage for being simple to design, build and tune
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