Switching control strategy based on non-singular terminal sliding mode for buck converter in auxiliary energy source

This paper proposes a switching control strategy for voltage control of buck converter in auxiliary energy source. The state-space average model of the buck converter is established. Then, the non-singular terminal sliding mode control (NTSMC)strategy is described. Furthermore, the switching sliding surface based on NTSMC is developed to achieve single-phase output, which can simplify the exponential operation of the NTSMC. The system stability is proved by the Lyapunov stability criterion. Simulation model with the proposed control strategy and conventional sliding mode control (CSMC) strategies are established. Compared with CSMC, the proposed strategy has a better stability and dynamic response. Copyright (C) 2018 The Authors. Published by Elsevier Ltd.