The novel adaptive sliding mode position control for synchronous reluctance motor drive

This paper presents an adaptive sliding mode position control design for robust stabilization and disturbance rejection of the synchronous reluctance motor (SynRM) drive system. In general, the conventional sliding mode control design method is assumed that the upper boundary of parameter variations and external disturbances is known and the sign function is used. Therefore, it causes high frequency chattering and high gain phenomenon. In this paper, we proposed an adaptive sliding mode control of the SynRM position drive system to avoid the high chattering drawbacks. This method utilizes Lyapunov function candidate to guarantee the convergence and track the position command of the SynRM system asymptotically. The estimator of parameter variations and external disturbances is designed to estimate the unknown lump uncertainty value which is different from conventional adaptive sliding mode control to estimate the unknown uncertainty upper boundary. Finally, we employ the experiments to validate the proposed method.