An SiC-Based AC/DC CCM Bridgeless Onboard EV Charger With Coupled Active Voltage Doubler Rectifiers for 800-V Battery Systems
Bibliographic record
Abstract
High voltage electric vehicle (EV) battery systems are gaining increasing attention in both industry and academia for their capability to reduce the charging time. This paper presents a novel single-stage onboard charger that consists of a CCM bridgeless boost converter integrated with an isolated CLL resonant converter and two magnetically coupled active voltage doublers. The proposed ac-dc charger achieves low THD and near unity power factor. The 800-V output voltage is regulated via variable switching frequency, with duty ratio control used to achieve PFC in the front-end CCM bridgeless boost circuit. The reduced number of semiconductor devices along with soft-switching operations enhance the overall circuit efficiency. Simulation results are given on both level 1 and level 2 charging systems with 2~5 kW, 120~240 Vac/800 Vdcto highlight the merits of the proposed converter. Experimental results are also given on a 120 Vac/800 Vdcprototype to support this work.
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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 | 0.000 |
| 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".