Control of High Gain Modified SEPIC Converter: A Constant Switching Frequency Modulation Sliding Mode Controlling Technique

Emre Ozsoy, Sanjeevikumar Padmanaban, Frede Blaabjerg, Dan M. Ionel, Ujjwal Kumar Kalla, Mahajan Sagar Bhaskar

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

8 Scopus citations

Abstract

This paper investigates, analyses and presents a control scheme for a modified SEPIC converter. High voltage conversion ratio is accomplished by using fewer passive components. The modified SEPIC converter is a combination of two different circuits. The first part is a standard SEPIC converter circuit, and the second part is a switched capacitor circuit. A high voltage conversion ratio is achieved up to 29 times by the input voltage, if the duty ratio is kept 0.9. However, high performance control of DC-DC converters is a difficult task due to nonlinearities and higher order behaviour. Control methods, such as PI controller or linear state space approaches cannot achieve the goal in a wide operating range. Instead, Sliding Mode Control (SMC) method is a suitable solution in such circumtances. Since it is insensitive to parameter deviations and free from system dynamics. This study accomplishes a SMC to the modified SEPIC converter and also maintains the constant switching frequency. The complete DC-DC converter along with the control algorithm using Matlab/Simulink simulation software is demonstrated. Simulations show impressive results with the expectations for different perturbation scenarios and matches the developed theoretical background.

Original languageEnglish
Title of host publicationProceedings - 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018
ISBN (Electronic)9781538660539
DOIs
StatePublished - Dec 26 2018
Event2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018 - Shenzhen, China
Duration: Nov 4 2018Nov 7 2018

Publication series

NameProceedings - 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018

Conference

Conference2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018
Country/TerritoryChina
CityShenzhen
Period11/4/1811/7/18

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

Keywords

  • DC-DC, Modified SEPIC Converter
  • Dynamic Hysteresis Control, High Voltage Conversion Ratio
  • Sliding Mode Control

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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