Bidirectional DC-AC Converter Using a High- Frequency Transformer with Multi-Frequency Decoupled Power Control
Bibliographic record
Abstract
A bidirectional isolated dc-ac converter that leverages the benefits of high-frequency (HF) power transfer to considerably reduce the size and weight of transformers is presented. The converter generates low-frequency grid compatible power output in a single conversion stage. Two sixleg inverters are connected across the open windings of three single-phase transformers, each with a center tap at the secondary. The inverters apply a differential-mode HF voltage across the windings to drive a HF current through the transformer, which is received by the secondary-side inverter to maintain the voltage of a dc capacitor. In addition, the secondary-side inverter generates a common-mode grid synchronized low-frequency voltage which drives the output current through the center tap of the secondary windings. A control scheme that independently operates on the HF power transfer and the low-frequency power output is presented. Simulation and experimental results of a 1.5-kW system are provided to validate the operation of the converter presented.
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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".