Speed Control of Induction Motor Drive Based on Indirect Vector Control Using PI Controller

The induction motors were characterized by complex, highly non-linear and time-varying dynamics, and hence their speed control is a challenging problem in the industry. The advent of vector control techniques has solved induction motor control problems. The vector control analysis of an induction motor allows the decoupled analysis where the torque and the flux components can be independently controlled (just as in dc motor). This makes the analysis easier than the per phase equivalent circuit. In indirect vector control scheme a current controlled voltage source inverter is considered, in which the stator phase currents serve as inputs, hence the stator dynamics can be neglected. In recent years, the field oriented control of induction motor drive is widely used in high performance drive system. It is due to its unique characteristics like high efficiency, good power factor and extremely rugged. This paper presents digital simulation of indirect vector controlled based speed control of induction motor drive by means of PI controller using MATLAB/SIMULINK.