A novel fuel-cell-driven system for rail transit vehicles based on dual-source motors

Currently, to alleviate environmental problems and energy crises, fuel cells are gradually being used in rail transit vehicle drive systems. In existing fuel-cell-driven systems, direct current (DC)/DC converters are widely used, but there are serious shortcomings in terms of cost, efficiency and market application. To solve these problems, a novel dual-source-driven system is innovatively presented in this study. In the dual-source-driven system, the multi-mode operating state of the dual-source motor was taken into consideration, and based on the independent vector control method, the dual-source-driven system was modelled and simulated to achieve the motor-independent control between power output and power generation as well as the energy exchange between fuel cell and secondary power battery under any working conditions. To verify the effectiveness of the proposed dual-source-driven system, the electric-driven performance test was carried out by the dual-source system experimental verification platform. The result for this drive system topology is further improved compared with the same level of DC/DC-driven system configuration used for this purpose.