Observer-based Adaptive Sliding Mode Control of Interleaved Boost Converter for Fuel Cell Vehicles

With increasingly serious environmental issues such as global warming, fossil fuels are gradually being replaced by clean energy. Fuel cells (FC) combining with hydrogen as a sort of clean energy have already been employed in many applications. Due to the nonlinear current-voltage property of FC, a DC-DC boost converter and a suitable controller are necessary for the FC system. In this paper, an observer-based adaptive sliding mode control is designed by considering the actual vehicle applications with unknown load and variable FC voltage for interleaved boost converter (IBC). The designed controller shows strong robustness in output voltage because of the adaptive laws. The system stability is proofed by Lyapunov functions. Last, the simulations were carried out to further verify the effectiveness of the designed controller.