A new zero voltage switching single stage power factor corrected three level resonant AC/DC converter
Bibliographic record
Abstract
This paper presents a new single stage power factor correction (SSPFC) AC/DC converter based on a three level LCC resonant converter topology. The proposed circuit integrates the operation of the boost power factor pre-regulator and the three level resonant DC/DC converter. The proposed control technique for this circuit is based on two control loops: the output voltage is regulated by controlling the switching frequency of the resonant converter, whereas, the DC bus voltage is regulated by means of duty cycle control of the boost part of the converter. This provides a regulated output voltage and a nearly constant DC bus voltage regardless of the loading condition; this in turn allows using smaller switches and consequently having a lower on resistance helping to reduce conduction losses. Zero voltage switching (ZVS) is also achieved for a wide range of loading and input voltage by having a lagging resonant current in addition to the flowing of the boost inductor current through the body diodes of the upper pair of switches in the free wheeling mode. The effectiveness of this method is verified on a 2.3 kW, 48 V converter, input voltage (90-265 Vrms). The converter has a resonant frequency of 770 kHz, and is operated above resonant frequency.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.002 |
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 source (direct Gemma or distilled Codex), 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".