• SHEETAL
• M.S.Aspalli

A cascaded high step up DC-DC converter realized with a tightly coupled three-winding coupled inductor is introduced in this paper. The capacitors are charged in parallel and discharged in series by the coupled inductor. Thus, the proposed converter can achieve high step-up voltage gain with appropriate duty ratio. The voltage stresses on the main switch can be reduced by a passive clamp circuit. Therefore, low resistance RDS(ON) for main switch can be adopted to reduce conduction loss. Compared with existing high step up converters, the proposed converter features that the smaller the turn’s ratio is, the larger the conversion gain. So, the name couple inductor reverse is given to represent reverse coupled inductor principle of operation. In addition, diode-capacitor circuit is introduced to not only recycle leakage energy to output, but also further increase the voltage conversion gain. The metal-oxide-semiconductor field-effect transistor (MOSFET) was used for the switching device. The major goal was to improve efficiency. The results of simulations are presented to evaluate the behavior and feasibility of the proposed topology. The operation of proposed system has been found satisfactory.

Cascaded high step-up DC-DC converter, coupled inductor-reverse, Metal-oxide-semiconductor field-effect transistor (MOSFET), Switching losses, reduced turns ratio.

"Implementation of Cascaded High Step-Up DC-DC Converter using Three-Winding Coupled Inductor and Diode Capacitor Technique", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.197-205, July-2018, Available :http://www.jetir.org/papers/JETIR1807378.pdf

"Implementation of Cascaded High Step-Up DC-DC Converter using Three-Winding Coupled Inductor and Diode Capacitor Technique", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp197-205, July-2018, Available at : http://www.jetir.org/papers/JETIR1807378.pdf