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 language | English |
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Title of host publication | Proceedings - 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018 |
ISBN (Electronic) | 9781538660539 |
DOIs | |
State | Published - Dec 26 2018 |
Event | 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018 - Shenzhen, China Duration: Nov 4 2018 → Nov 7 2018 |
Publication series
Name | Proceedings - 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018 |
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Conference
Conference | 2018 IEEE International Power Electronics and Application Conference and Exposition, PEAC 2018 |
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Country/Territory | China |
City | Shenzhen |
Period | 11/4/18 → 11/7/18 |
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