An ultra-high gain DC-DC converter with single-switch structure is introduced in this paper. Full soft-witching is provided by simultaneous use of quasi-resonant performance of one resonant tank and leakage inductance of a three-winding coupled inductor (CI). Adopting the secondary and tertiary windings of the CI in separated voltage multiplier cells enables the converter to provide ultra-high voltage gain. The reverse recovery problem is resolved thanks to the quasi zero current switching performance of nearly all diodes, especially output diode because of the second resonant tank, so the total electromagnetic interference is significantly reduced. Continuous input current with low ripple expands the application of the proposed converter, especially in renewable energy applications. Steady-state performance and design considerations of the introduced converter are analyzed thoroughly and compared with recently introduced converters to establish its merits. Experimental results of a 200 W prototype are given to validate its analysis and performance.INDEX TERMS DC-DC power converter, Coupled inductor, full soft-switching, single switch structure, ultra-high step-up converter.

No abstract

No abstract

Owing to the low voltage level that renewable energy sources like solar panels frequently provide, and limited capability of simple Boost converter, need for high gain step-up dc to dc converters are increased. In this work a single switch high step-up dc to dc topology with high efficiency is developed. To obtain high voltage gain, the described step-up dc to dc topology employs three windings coupled inductor and voltage multiplier cell method. To get the high voltage gain, this innovative converter does not require to work at a high duty cycle state by increasing the turns ratio of the coupled inductor. The suggested converter's working modes and theoretical model are investigated, and lastly, a prototype setup is used to verify the theoretical and simulation analyses' correctness.

No abstract

No abstract

No abstract

This paper presents a nonisolated high step-up soft switching DC/DC converter with continuous input and output energy, low input current ripple, and low voltage stress of semiconductors. In this topology, passive clamping circuits are used not only to recycle leakage energy but also to successfully alleviate voltage spikes on the active MOSFET. The leakage inductor, on the other hand, solves the output diode's reverse recovery problem effectively. Furthermore, output capacitors are connected in series to supply the output load, resulting in a smaller output capacitor volume. The suggested topology's operational theory, as well as steady-state analyses, is thoroughly explored. The proposed topology's voltage gain and switch stress are then compared with that of some high-gain topologies. After this, a prototype circuit with a 20 V input voltage, 340 V output voltage, and 200 W output power is designed to test the proposed topology's accuracy. K E Y W O R D Scoupled inductor, high step-up, ripple-free input current, zero current switching (ZCS)