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| Content Provider | IET Digital Library |
|---|---|
| Author | Li, Sen Fahimi, Babak |
| Abstract | Recently, LLC resonant converters have attracted significant research from industry and academia for AC–DC and DC–DC power conversion with high efficiency and remarkable power density. They are appealing candidates for numerous vehicular and renewable energy applications including battery chargers for electric vehicles and drivers of LED lights. This study introduces a mathematical model of LLC resonant half-bridge DC–DC converter, which captures its steady-state behaviours for both continuous conduction mode and discontinuous conduction mode operations. One major advantage of the proposed model lies in accurate estimation of the switching frequency of power switches under a wide range of parametric variations. This benefit is, however, not offered by the prevailing method based on the first harmonic approximation (FHA). The analytical derivations of the system's state-space model, as well as equations for calculating the switching frequency by FHA, are discussed in details. For illustration, a 340 W digitally controlled LLC resonant converter is targeted in this study. The simulation analyses of current and voltage waveforms for light and heavy load conditions are presented. Moreover, the experimental results, along with the comparison of switching frequency estimation for both methods, are demonstrated and discussed, which confirms the validity and effectiveness of the proposed model. |
| Starting Page | 1583 |
| Ending Page | 1592 |
| Page Count | 10 |
| ISSN | 17554535 |
| Volume Number | 13 |
| e-ISSN | 17554543 |
| Issue Number | Issue 8, Jun (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/13/8 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.1503 |
| Journal | IET Power Electronics |
| Publisher Date | 2020-02-14 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | AC–DC Battery Chargers Control of Electric Power System DC-DC Power Converter DC–DC Power Conversion Digital Control Electric Vehicle LLC Resonant Converter LLC Resonant Half-bridge DC–DC Converter Power 340.0 W Power Converter Power Electronics Power Supplies to Apparatus Power Supply Resonant Power Converter State-Space Modelling Supervisory Circuit Switching Circuit System Transportation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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