Current mode control for LLC series resonant dc-to-dc converters

Author

Jang, Jinhaeng ; Joung, Minjae ; Choi, Seokjae ; Choi, Youngho ; Choi, Byungcho

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Kyungpook Nat. Univ., Daegu, South Korea

fYear

2011

fDate

6-11 March 2011

Firstpage

21

Lastpage

27

Abstract

Conventional voltage mode control only offers limited performance for LLC series resonant dc-to-dc converters experiencing wide variations in operating conditions. This paper presents current mode control which could consistently provide good closed-loop performance for LLC resonant converters for the entire operational range. The proposed control scheme employs an additional feedback from the current of the resonant tank network to overcome the limitation of the existing voltage mode control. The superiority of the proposed current mode control over the conventional voltage mode control is verified using an experimental 150 W LLC series resonant dc-to-dc converter.

Keywords

DC-DC power convertors; closed loop systems; current-mode circuits; electric current control; resonant power convertors; LLC resonant converter; LLC series resonant DC-DC converters; closed loop performance; current mode control; power 150 W; Capacitance; Converters; Feedback circuits; Frequency control; Frequency measurement; Transfer functions; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE

Conference_Location

Fort Worth, TX

ISSN

1048-2334

Print_ISBN

978-1-4244-8084-5

Type

conf

DOI

10.1109/APEC.2011.5744570

Filename

5744570