A hybrid strategy with Simplified Optimal Trajectory Control for LLC resonant converters
Authors:
- 1 February 2012
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 10482334,p. 1096-1103
Abstract
In this paper, a Simplified Optimal Trajectory Control (SOTC) for the LLC resonant converters is proposed. During the steady state, linear compensator like PI or PID is used, controlling the switching frequency (fs) to eliminate the steady error. However, during load transients, the Simplified Optimal Trajectory Control (SOTC) method takes over, controlling the pulse widths of the driving signals. Using the state-plane analysis, the pulse widths are estimated, letting the state variables track the optimum trajectory locus in the minimum period of time. Experimental results show that digital logic requirement is very small, but the performance improvement is significant.Keywords
This publication has 9 references indexed in Scilit:
- Current mode control for LLC series resonant dc-to-dc converters2011
- LLC resonant converter burst mode control with constant burst time and optimal switching pattern2011
- Digital implementation of driving scheme for synchronous rectification in LLC resonant converter2010
- Optimal Design Methodlogy for LLC Resonant Converter2006
- Small-signal modeling of LCC resonant converter2003
- Optimal trajectory control of series resonant converter using modified capacitor voltage control technique2002
- A simple control technique for series resonant convertersIEEE Transactions on Power Electronics, 1996
- Implementation of optimal trajectory control of series resonant converterIEEE Transactions on Power Electronics, 1988
- Resonant Power Processors, Part II-Methods of ControlIEEE Transactions on Industry Applications, 1985