Single-stage soft-switched HF transformer isolated AC-to-DC multiphase converter
Bibliographic record
Abstract
A single-stage soft-switched high-frequency (HF) transformer isolated AC-to-DC multiphase converter is proposed. The operation and analysis of the proposed converter is presented for different operating modes. Using harmonic analysis, it is shown that N = 3 is almost the optimum number of cells to reduce the input current HF harmonic components. A design example of a 5 kW, 420 V, 50 kHz AC-to-DC multiphase converter is presented to illustrate the design procedure. PSPICE simulation results are presented to verify the operation and performance of the designed converter. A 110 V RMS, 1.5 kW, 50 kHz laboratory prototype was built using fast IGBTs to verify the operation and performance of the proposed 3-cell single-stage AC-to-DC multiphase converter. The PSPICE simulation and experimental results show that all the switches are soft-switched. Because of the HF transformer isolation, the intercell cross-conduction problem is eliminated.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".