Implementation of hybrid electric vehicle energy management system for two input power sources

Aiming at reducing both size and losses of energy saving system and also integrating the system's output current and voltage, this paper proposed a new energy management strategy using novel controller in application of hybrid electric vehicles (HEVs). The proposed controller, called hybrid sliding mode controller (HSMC), significantly improves the transient response and disturbance rejection of the two input bidirectional converters (TIBCs), while preserving the closed loop stability. The combination of the SMC and invasive weed optimization (IWO), realizes a fast transient response over a wide transient load changes and input voltage disturbances. The development of TIBC modelling based on state space averaging technique has been discussed. Practical and simulation results are reported to validate the theoretical predictions and to confirm the superior performance of the proposed nonlinear controller when it is compared with a traditional SMC. Finally the performance of manufactured EV which equipped with proposed controller was investigated through practical test in case of the stochastic EV driving cycle.