Microprocessor/digital Control and Artificial Intelligent Vector Control Techniques for Induction Motor Drive: a Rewiew

In the past few decades the control circuitry was conventionally built from logic hardware and discrete components with inherent limitations of low processing power. Advances in microprocessors, microcontrollers, and microcomputers have made tremendous impact on electric motor drives. It has enabled implementation of sophisticated and complex control techniques. Conventional vector control scheme uses a unit vector to achieve an accurate transformation so that the flux producing current component aligns with the rotor magnetic flux. It also uses the mathematical model of the induction motor in which the rotor parameters, rotor resistance and rotor inductance, plays a very important role. However, both parameters vary with operating conditions or environmental factors therefore it is difficult for conventional vector drive to maintain consistent performance under all operating conditions due to machine parameter variations. The Intelligent control techniques like, fuzzy logic control / Neural network control uses heuristic input-output relations to deal with vague and complex situations. This paper presents a literature survey on the microprocessor /Digital and Intelligent control techniques for vector of induction motor drive. Various vector control techniques based on microprocessor /digital control, control are described. Attempt is made to provide a guideline and quick reference for the researchers and practicing engineers those are working in the area of vector control.