High Gain Boost Interleaved Converters with Coupled Inductors and with Demagnetizing Circuits

Michal Frivaldsky, Branislav Hanko, Michal Prazenica and Jan Morgos
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Michal Frivaldsky: Department of Mechatronics and Electronics, Faculty of Electrical Engineering, University of Zilina, Zilina 010 26, Slovakia
Branislav Hanko: Department of Mechatronics and Electronics, Faculty of Electrical Engineering, University of Zilina, Zilina 010 26, Slovakia
Michal Prazenica: Department of Mechatronics and Electronics, Faculty of Electrical Engineering, University of Zilina, Zilina 010 26, Slovakia
Jan Morgos: Department of Mechatronics and Electronics, Faculty of Electrical Engineering, University of Zilina, Zilina 010 26, Slovakia

Energies, 2018, vol. 11, issue 1, 1-20

Abstract: This paper proposes double interleaved boost converters with high voltage gain and with magnetically coupled inductors, while a third coupled winding is used for magnetic flux reset of the core during converter operation. The topology of the proposal is simple, it does not require many additional components compared to standard interleaved topologies, and it improves the transfer characteristics, as well as system efficiency even for high power levels. The investigation of steady-state operation was undertaken. It was discovered that the proposed converter can be designed for a target application where very high voltage gain is required, while adjustment of voltage gain value can be done through duty-cycle variation or by the turns-ratio modification between individual coils. The 1 kW prototype was designed to test the theoretical analysis. The results demonstrate that the proposed converter achieves very high voltage gain (1:8), while for the designed prototype the peak efficiency reaches >96% even when two additional diodes and one winding were implemented within the converter’s main circuit. The dependency of the output voltage stiffness on load change is minimal. Thus, the presented converter might be a proper solution for applications where tight constant DC-bus voltage is required (a DC-DC converter for inverters).

Keywords: interleaved boost converter; magnetically coupled inductors; demagnetizing circuit (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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