© OCT 2019 | IRE Journals | Volume 3 Issue 4 | ISSN: 2456-8880 IRE 1701670 ICONIC RESEARCH AND ENGINEERING JOURNALS 63 Design of DC-DC Converter ANIKET PIPPAL 1 , PROF. RAKESH NARVEY 2 , PROF. HIMMAT SINGH 3 1 ME student, Madhav Institute of Science and Technology, Gwalior (M.P) 2, 3 Assistant Professor, Department of Electrical Engineering, Madhav Institute of Science and Technology, Gwalior (M.P) Abstract- This is a Two-switch converter belongs to fourth-order family and performs boosting operation. A new two-input Buck-SEPIC DC-DC converter suitable to draw power from two different dc sources feeding a common dc-bus is presented in this paper The salient feature of the proposed converter is that both the sources are simultaneously supplying power to the downstream load at reduced ripple current. This feature is particularly attractive for dc grid application. I. INTRODUCTION The technological development of power electronics definitely brought back dc system in power utilization reliability, accuracy and better load regulation are main issues of modern power supply Today power electronics system are highly developed so demand of Switch-mode power converter is increasing day by day in various application such as hybrid vehicles and telecommunication power supply. In order to utilize maximum energy from more than one energy source such as fuel cell, battery, solar array and wind energy various multi input converter has been proposed in the recent year. Depending upon the applications one could select a feasible topology by considering many features like reliability, cost and flexibility. It is more advantageous to use multi-input converter rather than several independent single source converters as it results in less number of components, more stability in modern power electronics system several power sources such as battery ultracapacitor, fuel cells are used, therefore utilization of multi-input converters is inevitable. Multi input converter has advantage of higher system efficiency, high power density, light weight and small size. The objective of this paper is to generate a two input topology by using pulsating source cell derived from six non-isolated converter such as buck, boost buck- boost, Cuk, SEPIC and Zeta. In this paper one buck and one SEPIC prime PWM converter are combined to transfer power from source to load [1]. Basically any converter (except buck and boost) can be divided in to three section namely input portion IP, energy storing buffer portion EBP, and output portion OP. During one moment of switching cycle input portion will transfer power to the buffer portion and during next moment of switching cycle energy buffer portion will transfer the stored energy to the output portion without consuming any energy. This energy buffer portion may be a voltage or current buffer. There are certain rules to connect PCSC are PVSC with prime PWM converter [1]. To address some the issues various type of multi- input converter with different topology has been already reported in literature. In this paper buck and SEPIC converter based multi-input converter is proposed and then digital controller have been design to ensure load bus voltage regulation together with distribution of power by appropriate control of input dc power sources. The proposed converter has a unique feature of buckning action which is important from dc grid application point of view. Several controller design approaches have been reported in literature .However depending upon the interaction between the control loops control structure has to be chosen. If the interaction is very small then decentralized control technique will be a feasible option.