A New Quadratic Voltage Lift Cascaded Boost Topology for Hydrogen Extraction

This paper presents a novel non-isolated DC-DC converter topology with several significant advantages. First, the input current remains continuous, thereby reducing the current stress on the input filter capacitor. Second, the converter utilizes the same number of inductors as conventional topologies such as SEPIC, Zeta, and Ćuk converters. Third, it achieves high voltage gain at relatively low duty cycles. Fourth, the maximum voltage stress on the semiconductors remains well below the output voltage, ensuring improved device reliability. Fifth, the design incorporates only a single switch, simplifying the drive circuitry. Sixth, the voltage stress on the switch is significantly lower than the output voltage. Seventh, a quadruple voltage-lift is realized using an enhanced diode–capacitor voltage multiplier integrated at both stages of the converter. Finally, although the power circuit employs ۱۵ diodes and ۱۴ capacitors, the topology maintains a high voltage gain density, justifying the component count. Experimental results are provided to validate the theoretical analysis. The implemented prototype successfully boosts an input voltage of ۲۰ V to an output of ۱۲۰۰ V at a ۵۰% duty cycle, delivering an output power of less than ۲۰۰ W.

کلیدواژه ها:

Step-up dc-dc converter ، Low input current ripple ، Hydrogen Extraction