Application of a time-varying switching line in the cascade sliding-mode speed control of the induction motor drive

This paper deals with the sliding mode application in the control of the induction motor speed. The equivalent control method, in which the control signal consists of two parts: continuous and discontinuous is used. In order to ensure identical dynamics of the speed transients and system robustness during the switching line reaching phase, regardless of the external and parametric disturbances, the time-varying switching line is introduced.