Soft-switching single stage isolated AC-DC converter for single-phase high power PFC applications
Bibliographic record
Abstract
In this paper, a novel single-stage isolated AC-DC converter is proposed for single-phase high power PFC applications. The circuit is derived by combining the boost converter and the matrix-based isolated AC-DC converter. Compare to traditional PFC plus DC/DC configuration, this topology has no diode front end and the number of semiconductors in the current path is minimized. Thus the conduction loss is decreased. By adding a small clamping capacitor and two small size commutation inductors, softswitching for all switches can be realized. Thus the system efficiency can be significantly improved. Furthermore, traditional PWM technology can be applied. Problems of resonant based soft-switching converters including large EMI filter size, high devices voltage and current stress, and low light load efficiency can be avoided. In this paper, the topology derivation and circuit operational analysis are given. The control strategy is introduced and a simulation is carried out to verify the circuit.
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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 | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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".