Hybrid Control Strategy of Phase-Shifted Full-Bridge LLC Converter Based on Digital Direct Phase-Shift Control - Details

Author：

Guo, Bing (Guo, Bing.) | Zhang, Yiming (Zhang, Yiming.) | Zhang, Jialin (Zhang, Jialin.) | Wang, Xuhong (Wang, Xuhong.) | Ding, Jianzhi (Ding, Jianzhi.)

Indexed by：

EI Scopus PKU CSCD

Abstract：

A　digital　direct　phase　shift　control　(DDPSC)　method　is　presented　based　on　phase-shifted　full-bridge　LLC　(PSFB-LLC)　converter.　This　paper　combines　the　presented　method　with　the　conventional　linear　control　to　obtain　a　hybrid　control　strategy.　The　strategy　has　both　the　advantages　of　linear　control　and　DDPSC　control.　It　is　not　only　easy　to　realize　but　also　has　quick　dynamic　responses.　The　PSFB-LLC　circuit　structure　is　simple　and　it　works　in　fixed　frequency　mode;　it　can　realize　the　ZVS　of　the　switch　tube　and　the　ZCS　of　the　rectifier　diode　in　wide　load　range.　In　this　paper,　the　PSFB-LLC　converter　resonator　is　analyzed　in　detail;　the　concrete　realization　scheme　of　the　hybrid　control　strategy　is　given　by　analyzing　the　phase　plane　and　the　time　domain　model;　a　3kW　principle　prototype　is　finally　developed;　the　feasibility　and　effectiveness　of　DDPSC　controller　and　hybrid　strategy　are　verified　by　experimental　results.　©　2018,　Electrical　Technology　Press　Co.　Ltd.　All　right　reserved.

Keyword：

Electric rectifiers Linear control systems Time domain analysis Power converters

Author Community：

[ 1 ] [Guo, Bing]Faculty of Information Technology, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Zhang, Yiming]Faculty of Information Technology, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Zhang, Jialin]Faculty of Information Technology, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Wang, Xuhong]Faculty of Information Technology, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Ding, Jianzhi]Faculty of Information Technology, Beijing University of Technology, Beijing; 100124, China