Design and implementation of an induction motor drive using sliding-mode control scheme

Among most sliding mode control schemes reported up to date, uncertain bounds on parameters and external disturbance must be known for a sliding mode control design to achieve robust performance successfully. This paper presents an implicit sliding-mode control scheme for a field-oriented induction motor with variable loading and unknown external disturbance to achieve fast and robust command tracking performance. The dynamic model is derived and an experimental model is also obtained for controller design. Experimental validation has been performed by implementing the control schemes on a DSP board to evaluate the effectiveness of the proposed scheme in rejecting parametric variation and unknown external disturbance but with less chatter as compared to the conventional sliding-mode controller design