Abstract
In this paper, a comprehensive sliding mode control (SMC) loop design for a CLLC resonant converter is proposed. The major objectives of the proposed SMC are to improve the converter dynamics and to achieve a tight output voltage regulation with respect to any parameter variations and external disturbances. The sliding surface coefficients are selected to ensure both large-and small-signal stability for the robustness of the converter under different operating conditions. Furthermore, system dynamic performances considering the error dynamics and overshoots are investigated. To validate the proposed algorithm, a hardware prototype of a bi-directional CLLC resonant converter for plug-in electric vehicle applications is developed and tested up to 1 kW, and the effectiveness of the proposed control solution is verified by the load transients and start-up tests. At a 100% step-change in load power, the SMC achieves 1 ms settling time, which is approximately 0.9 ms faster than the conventional proportional integral control strategy.
| Original language | English (US) |
|---|---|
| Article number | 8664605 |
| Pages (from-to) | 12274-12284 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 34 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2019 |
| Externally published | Yes |
Keywords
- CLLC
- electric vehicles (EV)
- resonant converter
- robustness
- sliding mode control (SMC)
ASJC Scopus subject areas
- Electrical and Electronic Engineering