Research on Dual-Operation Mode of 3-level LLC resonant converter

Author

Zhenwei Li ; Lei Zhao ; Yuan Liu ; Haoyu Li

Author_Institution

Harbin Inst. of Technol., Harbin, China

fYear

2015

fDate

1-5 June 2015

Firstpage

2636

Lastpage

2643

Abstract

In order to meet the demands of high efficiency and a wide adaptable range of input voltage, a DualOperation Mode half-bridge LLC converter which can operate in two different modes according to the level of input voltage is obtained by adjusting the driving control strategy of 3-level LLC resonant converter, and the adaptable range of input voltage is doubled with the same parameters of resonant tank. The limiting factors on adaptable range of input voltage are defined by analyzing the voltage gain characteristic and power loss of LLC converter. After analyzing the Dual-Operation Mode of 3-level LLC converter and its influence on the adaptable range of input voltage, the driving control strategy is defined. The characteristic about wide input adaptability and high efficiency of the Dual-Operation Mode half-bridge LLC converter are verified through simulation and experiments.

Keywords

resonant power convertors; 3-level LLC resonant converter; dual-operation mode; limiting factors; power loss; resonant tank; voltage gain characteristic; Integrated circuit modeling; Magnetic circuits; Magnetic cores; Magnetic hysteresis; Magnetic resonance; Switching frequency; Dual-Operation Mode; driving control strategy; high efficiency; wide adaptable range of input voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE-ECCE Asia), 2015 9th International Conference on

Conference_Location

Seoul

Type

conf

DOI

10.1109/ICPE.2015.7168188

Filename

7168188