Publication: Modified five-level llc resonant boost dc/dc converter
| datacite.subject.fos | oecd::Engineering and technology::Electrical engineering, Electronic engineering, Information engineering | |
| dc.contributor.author | Ali Idress, Rahel Bughneda | |
| dc.date.accessioned | 2025-11-27T07:10:50Z | |
| dc.date.available | 2025-11-27T07:10:50Z | |
| dc.date.issued | 2024-07-01 | |
| dc.description.abstract | Multi-level resonant converters are effective for power conversion across various applications, offering enhanced efficiency, reduced voltage stress, higher power density, a wide input voltage range, and better EMC performance. These features make them ideal for the renewable energy systems, electric vehicles, data centres, and industrial use. Converters with more levels can improve total harmonic distortion (THD) reduction, but they also increase the system's complexity and total switching losses. This thesis proposes a modified multilevel LLC resonant DC-DC boost converter with variable frequency and integrated control for modulation index, aiming for optimal efficiency, steady output voltage gain, zero voltage switching (ZVS), and wide load variation. All the selected parameters for the analysis were emphasized in detail. Furthermore, the converter's performance was investigated under varying load conditions at nominal input voltage and varying solar insolation at full load. It was found that the proposed control system successfully responded to both changes and maintained the output voltage at the desired value by varying the switching frequency within a selected range, achieving a 1000V, 5kW output with 97.1% efficiency. Additionally, the developed five-level LLC resonant converter exhibited different behavior compared to conventional LLC resonant full/half-bridge converters, where the switching frequency of these converters is consistently lower than the resonance frequency under all load and input conditions. The theoretical parts and simulation results obtained from MATLAB-SIMULINK simulations were validated experimentally using a laboratory prototype. Selected findings were discussed to illustrate the efficacy of the designed converter. | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/23228 | |
| dc.language.iso | en | |
| dc.title | Modified five-level llc resonant boost dc/dc converter | |
| dc.type | Resource Types::text::thesis::doctoral thesis | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |