Sliding Mode Speed Controller for a Vector Controlled Double Star Induction Motor

This paper presents a speed sliding mode controller for a vector controlled (FOC) double star induction motor (DSIM) fed by a two pulse width modulation voltage source inverters. The machine has two sets of three-phase windings which are spatially phase shifted by 30 electrical degrees with isolated neutrals. The sliding mode control (SMC) is used to achieve robust performance against parameter variations and external disturbances. The problem with this conventional controller is that it has large chattering on the torque and the drive is very noisy. In order to reduce a torque ripple, the sign function is used. The proposed algorithm was simulated by Matlab/Simulink software and simulation results show that the performance of the control scheme is robust and the chattering problem is solved. Streszczenie. Zaprezentowano sterownik ślizgowy silnika indukcyjnego DSIM zasilanego z przeksztaltnika dwu-pulsowego z modulacją napiecia. Sterpownik taki zastosowano dla uzyskania odporności na zewnetrzne zaklocenia. (Sterownik ślizgowy do silnika indukcyjnego typu DSIM)