LLC resonant converter with matrix transformer

Author

Daocheng Huang ; Shu Ji ; Lee, Fred C.

Author_Institution

Center for Power Electron. Syst., Virginia Tech, Blacksburg, VA, USA

fYear

2014

fDate

16-20 March 2014

Firstpage

1118

Lastpage

1125

Abstract

In this paper, a high efficiency high power density matrix transformer structure for LLC resonant converters is proposed. Matrix transformer is help to reduce leakage inductance and the AC resistance of windings. Flux cancellation method is utilized to reduce core size and loss. Synchronous Rectifier (SR) devices and output capacitors are integrated into secondary windings to eliminate termination related winding losses, via loss and leakage inductance. A detail design procedure is proposed. A 1MHz 390V /12 V 1kW LLC resonant converter prototype is built.

Keywords

resonant power convertors; transformer windings; AC resistance; LLC resonant converter; SR device; core size reduction; flux cancellation method; frequency 1 MHz; high-efficiency high-power density matrix transformer structure; leakage inductance elimination; leakage inductance reduction; loss reduction; output capacitors; power 1 kW; related winding loss elimination; synchronous rectifier device; via loss elimination; voltage 12 V; voltage 390 V; Inductance; Matrix converters; Rectifiers; Transformer cores; Transmission line matrix methods; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE

Conference_Location

Fort Worth, TX

Type

conf

DOI

10.1109/APEC.2014.6803447

Filename

6803447