A Progressive High Gain DC DC Converter Applied For Fuel Cell Vehicles In Transportation Applications

Abstract

For fuel cell vehicles, the DC-DC converter should have a high gain, low voltage stress, small size, and high efficiency. Conventional two-level, three-level, and cascaded boost converters, on the other hand, are unable to match the requirements. This work proposes a new non-isolated DC-DC converter with switched-capacitor and switched-inductor, which has a high gain, a wide input voltage range, low voltage stresses between components, and a common ground topology. The operating principle, component parameter design, and comparisons with other high-gain converters are all discussed in this paper. To obtain the dynamic model of the converter, the state-space averaging method and small-signal modelling method are used. Finally, simulation and experimental data back-up the proposed topology's usefulness. The experimental prototype's input voltage varies from 25 to 80 volts. The rated output voltage is 200V, with a 100W rated power. Under the rated state, the maximum efficiency is 93.1 percent. Fuel cell vehicles can use the suggested converter.