Modelling and Analysis of Indirect Field-Oriented Vector Control of Induction Motor (IM)

Abstract

High dynamic performance which is a characteristic feature of a dc motor is achievable in ac Induction Motor (IM) through advancements in different power electronic devices and development in various vector control strategies. The presented work is based on field-oriented vector-control of IM drive. For developing vector-controlled IM drive, first the IM is modelled in MATLAB/Simulink using space vector equivalent circuit in static reference frame. Then indirect field-oriented vector control (VC) is implemented in the developed IM model using rotating reference frame. In indirect field-oriented VC the current coming from the stator of the IM is decoupled into two orthogonal components of a vector where one component represents the magnetic flux of IM and the other component represents the torque. The analysis shows that by using indirect field-oriented VC the speed and torque of IM can be independently controlled.