A high step-up transformerless DC/DC converter with flat efficiency

Author

Ranjram, Mike ; Simeonov, Gregor ; Lehn, Peter W.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada

fYear

2014

Firstpage

1034

Lastpage

1040

Abstract

This paper proposes a high step-up, transformerless, dc/dc converter suitable for applications where high efficiency at low power throughput is required. The proposed converter achieves high step-up dc/dc conversion through a resonant LC tank and realizes high-efficiency operation via the softswitching enabled by this resonant network. Flat efficiency is obtained via discontinuous conduction mode (DCM) operation of the converter. A burst operating mode is proposed for achieving increased efficiency operation. Finally, a 100V/800V, 650W prototype is implemented to experimentally validate the converter´s operation, and flat efficiencies are measured over a wide operating range.

Keywords

DC-DC power convertors; LC circuits; resonant power convertors; burst operating mode; discontinuous conduction mode; flat efficiency DC-DC converter; high efficiency operation; low power throughput DC-DC converter; power 650 W; resonant LC tank; step-up transformerless DC-DC converter; voltage 100 V; voltage 800 V; Capacitors; Equations; Inductors; Power generation; Switches; Switching frequency; Topology; DC-DC power converters; energy efficiency; parasitic capacitance; photovoltaic systems; zero current switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE

Type

conf

DOI

10.1109/IECON.2014.7048629

Filename

7048629