Title :
Modeling and Design of the LLC Resonant Converter Used as a Solar-Array Simulator
Author :
Chien-Hsuan Chang ; Chun-An Cheng ; Hung-Liang Cheng
Author_Institution :
Dept. of Electr. Eng., I-Shou Univ., Kaohsiung, Taiwan
Abstract :
The LLC resonant converter has been used to implement a solar-array simulator with high-efficiency and fast-response features. In this paper, its small-signal model is derived based on the extended describing function concept. The corresponding frequency response can be easily obtained from IsSPICE simulation of the equivalent circuit model. The derived model is matching with the measured results very well. Furthermore, a solar-array simulator with closed-loop control is designed according to the derived small-signal model. The experimental measurements have really proved that high-efficiency and fast-transient responses can be achieved in the system. The output voltage and output current can be adjusted simultaneously to match the electrical characteristics of photovoltaic output.
Keywords :
closed loop systems; equivalent circuits; frequency response; resonant power convertors; solar cell arrays; IsSPICE simulation; LLC resonant converter; closed-loop control; equivalent circuit model; extended describing function concept; fast-transient responses; frequency response; output current; output voltage; photovoltaic output; small-signal model; solar-array simulator; Harmonic analysis; Integrated circuit modeling; Mathematical model; Resonant frequency; Steady-state; Switching frequency; Video recording; Extended describing function (EDF); LLC resonant converter; small-signal model; solar-array simulator (SAS);
Journal_Title :
Emerging and Selected Topics in Power Electronics, IEEE Journal of
DOI :
10.1109/JESTPE.2014.2349980
