Variable Frequency-Duty Cycle Modulation Technique for Light Load Efficiency Improvement of LLC Resonant Converter for Wide Input Voltage Range in PV Applications
Bibliographic record
Abstract
LLC type series resonant converter has gained prominence for applications which require zero voltage switching (ZVS) for wide input and load range variation. However, conversion efficiency under constant switching frequency modulation (FM) degrades at light-load conditions. Switching losses (due to loss of ZVS and turn -off) dominates the total losses. This is due to a wide range of switching frequencies required for output voltage regulation. Turn-off losses also increase significantly at high switching frequencies. The proposed modulation technique narrows the switching frequency range while, while ensuring tight output voltage regulation. and reduces the effective duty ratio. Furthermore, the structure of the converter doesn't require any modification during the design procedure. An analytical time domain mathematical model has been derived for the proposed technique for accurate voltage gain calculations. An experimental prototype of 20-40V input, 380V/300W output LLC resonant converter for solar micro-inverter application has been built to validate the proposed modulation technique by significantly improving light load efficiency.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".