Super twisted Sliding Mode Control of Isolated Bidirectional DC-DC Converter in Electric Vehicle

This paper describes the construction and control of high power Bi-directional Dual Active Bridge (DAB) Converter. It is suggested to use super twisted sliding mode control (STSMC) algorithm for 4 KW DAB. The author proposes using bidirectional DAB as an auxiliary power supply in electric vehicles (EV). It is connected between DC link and storage batteries, for charging and discharging batteries. For high power range, Dual Active Bridge (DAB) topology is selected for galvanic isolation purposes. Triangular Current Mode Modulation is used to overcome the problems of Phase Shift Modulation such as high RMS current and switching losses. STSMC is used for its ability to reduce chattering, in addition to its robustness against parameters variation. The simulation results using PSIM software show the fast response of the converter to mitigate the disturbances and tracking the sudden load change. In addition to using STSMC increases the switching frequency range and reduce the converter components size. The used switching frequency is 80 kHz.