Current Mode Control for LLC Series Resonant DC-to-DC Converters†

Energies

Jinhaeng Jang¹  Syam Kumar Pidaparthy²  Byungcho Choi² 

[1] Power Electronics Team, LG Electronics, Pyungtaek-city, Kyungki-do 451-713, Korea; E-Mail:;School of Electronics Engineering, Kyungpook National University, Daegu 702-701, Korea; E-Mail:

关键词: LLC series resonant DC-to-DC converters;    current mode control;    closed-loop performance;    voltage mode control;   

DOI  :  10.3390/en8066098

来源: mdpi

【 摘 要 】

Conventional voltage mode control only offers limited performance for LLC series resonant DC-to-DC converters experiencing wide variations in operational conditions. When the existing voltage mode control is employed, the closed-loop performance of the converter is directly affected by unavoidable changes in power stage dynamics. Thus, a specific control design optimized at one particular operating point could become unacceptable when the operational condition is varied. This paper presents a new current mode control scheme 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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland