# New high step-up coupled dual winding quadratic enhanced SEPIC DC-DC converter

Soroush Esmaeili, Sara Hasanpour, Hossein Hafezi

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

## Abstract

This paper introduces a non-isolated high step-up dc-dc converter originated from single-ended primary-inductor converter (SEPIC). The suggested dual winding quadratic enhanced SEPIC converter (DWQ-ESC) employs a voltage-boosting module to attain superior boost ability. A unique coupled inductor is exploited to regulate the boost factor by tuning the transformer's turns ratio along with the switching duty cycle. Additionally, very high boost factor is achieved at low transformer's turns ratio (limited around 1.0). As a result, low winding turns ratio is required for very high gain applications. Also, a clamping circuit is considered to eliminate the leakage inductance effects of the coupled inductor across the power switch. A single switch with a full control range of duty cycle ($0 < \mathrm{D} < 1$) is utilized in the proposed DWQ-ESC that results in low conducting losses and high efficiency. The introduced DWQ-ESC drains a smooth current from the input dc source that makes it appropriate for renewable energy sources (RES) such as photovoltaic (PV) and wind sources. Theoretical analysis and simulation results are presented in the paper to demonstrate that the introduced topology can obtain high boost factor with a reduced duty ratio in comparison with existing similar quadratic dc-dc converters.

Original language English SEST 2021 - 4th International Conference on Smart Energy Systems and Technologies IEEE 6 9781728176604 https://doi.org/10.1109/SEST50973.2021.9543169 Published - 27 Sep 2021 A4 Article in conference proceedings International Conference on Smart Energy Systems and Technologies - Virtual, Vaasa, FinlandDuration: 6 Sep 2021 → 8 Sep 2021

### Publication series

Name SEST 2021 - 4th International Conference on Smart Energy Systems and Technologies

### Conference

Conference International Conference on Smart Energy Systems and Technologies Finland Virtual, Vaasa 6/09/21 → 8/09/21

## Keywords

• Dc-dc converter
• Dual winding converter
• Enhanced SEPIC converter
• Non-isolated converter

## Publication forum classification

• Publication forum level 1

## ASJC Scopus subject areas

• Artificial Intelligence
• Information Systems and Management
• Energy Engineering and Power Technology
• Electrical and Electronic Engineering
• Control and Optimization

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