Open AccessRobust Digital Control for an LLC Current-Resonant DC-DC Converter
Author(s) -
Tomoya Nishimura,
Yuka Adachi,
Yoshihiro Ohta,
Kohji Higuchi,
Eiji Takegami,
Satoshi Tomioka,
Kamon Jirasereeamornkul,
Kosin Chamgthai
Publication year - 1970
Publication title -
ecti transactions on computer and information technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.132
H-Index - 2
ISSN - 2286-9131
DOI - 10.37936/ecti-cit.201371.54355
Subject(s) - converters , digital control , forward converter , flyback converter , controller (irrigation) , control theory (sociology) , direct current , voltage , current (fluid) , dc motor , electrical engineering , electronic engineering , computer science , engineering , boost converter , control (management) , biology , agronomy , artificial intelligence
If a pulse frequency and a load resistance of an LLC current-resonant DC-DC converter are changed, the dynamic characteristics are varied greatly, that is, the LLC current-resonant DC-DC converter has non-linear characteristics. In many applications of DC-DC converters, loads cannot be specified in advance, and they will be changed suddenly from no loads to full loads. A DC-DC converter system used a conventional single controller cannot be adapted to change dynamics and it occurs large output voltage variation. In this paper, a robust digital controllerfor suppress the change of step response characteristics and variation of output voltage in the load sudden change is proposed. Experimental studies using a micro-processor for the controller demonstrate that this type of digital controller is effective to suppress the variation.