Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE
Conference_Location :
Fort Worth, TX
DOI :
10.1109/APEC.2014.6803447
