In this paper, a new high step-up cascaded DC-DC converter is presented. The first stage of the proposed converter is a buck-boost converter with modified converter topology. The second stage is a boost converter with coupled inductor and voltage multiplier cells. The literature has reported on various voltage-boosting techniques, in which fundamental energy storing elements (inductors and capacitors) and/or transformers in conjunction with switch and diode(s) are utilized in the circuit. These techniques include switched capacitor (charge pump), voltage multiplier, switched inductor/voltage lift, magnetic coupling, and multistage/-level, and each has its own merits and demerits depending on application, in terms of cost, complexity, power density, reliability, and efficiency. The energy stored in the leakage inductor of the coupled inductor is recycled by a passive voltage clamp to a capacitor thereby improving the efficiency. Besides, the blocking voltage across the MOSFET switch is reduced in the proposed topology due to voltage clamp circuit. Finally, broad applications of dc–dc converters are presented and summarized with comparative study of different voltage-boosting techniques. The steady-state analysis of the proposed converter is presented in the paper.
Buck-boost converter, cascaded converter, coupled inductor, high step-up DC-DC converter, voltage clamp circuit.
Soundaryagurulakshmi R V "A Two Stage Coupled Inductor Based Cascaded Dc-Dc Converter with A High Voltage Gain" Iconic Research And Engineering Journals Volume 4 Issue 10 2021 Page 8-11
Soundaryagurulakshmi R V "A Two Stage Coupled Inductor Based Cascaded Dc-Dc Converter with A High Voltage Gain" Iconic Research And Engineering Journals, 4(10)