Vieira, Rodrigo PadilhaGastaldini, Cristiane CauduroAzzolin, Rodrigo ZelirGründling, Hilton Abílio2016-12-012016-12-012012VIEIRA, Rodrigo Padilha et al. Discrete-time Sliding Mode Speed Observer for Sensorless Control of Induction Motor Drives. Iet Electric Power Applications, v. 6, n. 9, p. 681-688, 2012. Disponível em: <http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6353081>. Acesso em: 20 fev. 2015.1751-8660http://repositorio.furg.br/handle/1/6840This study investigates the rotor speed estimation problem for induction motor drives. The authors propose the design of a scheme based on a discrete-time sliding mode observer which provides the rotor speed estimative. A new algorithm for discrete-time rotor speed estimation is developed and analysed. The conditions for the existence of a discrete-time sliding switching hyperplane are analysed. Moreover, conventional algorithms aiming at the chattering reduction and high-frequency switching on discrete-time implementation are discussed for use with the proposed technique. The stability analysis and parameter convergence of the proposed method are investigated for discrete-time solution. The algorithms developed are tested by experimental results based on fixed-point digital signal processor (DSP) platform (TMS320F2812). Therefore the results demonstrate the good performance of the proposed scheme.engrestrict accessarticle10.1049/iet-epa.2011.0269