An Integrated Derived Boost-Flyback Converter for fuel cell hybrid electric vehicles

In this paper, An Integrated Derived Boost-Flyback Converter with high voltage gain and reduced switch stress is proposed. It was used by fuel cell for hybrid electric vehicle applications. The proposed topology combines derived boost and flyback converters with a coupling inductor technique, which is able to achieve high voltage gain. The proposed converter extends the voltage gain without an extreme switch duty cycle by the three-winding coupled inductor and a voltage multiplier capacitor. The energy stored in leakage inductor of the coupled inductor can be recycled to the output capacitor to achieve high efficiency. The operational principles and steady-state analysis in continuous-conduction mode are described in detail to verify the performance of the proposed converter.