A Half-Bridge/Dual Stacked-Switches Structured AC/DC Electrolytic Capacitor-Less Bidirectional Converter With Soft-Switching for High-Voltage EV Charger
Bibliographic record
Abstract
This article presents a half-bridge (HB)/dual stacked switches, fully soft-switched bidirectional electrolytic capacitor-less ac/dc resonant converter, tailored for high-voltage (HV) electric vehicle (EV) systems. The proposed converter integrates a closed-loop power factor correction (PFC)mechanism based on the$dq$model of the inputLCLfilter, ensuring high-quality sinusoidal input current and reduced total harmonic distortion in both ac/dc conversion and dc/ac inversion modes. The front-end HB PFC circuit operates in continuous conduction mode with soft-switching operation, which eliminates the high peak current issue that happens in the switches in discontinuous conduction mode. Moreover, the dual stacked switches configuration of the proposed converter reduces the voltage stress on the switches to half of the dc-link and output voltage. A dedicated duty ratio-based closed-loop control system in both primary and secondary sides of the dual-stacked-switches resonant converter drastically reduces the double-line frequency voltage ripple, thereby eliminating the need for bulky electrolytic storage capacitors. Output voltage regulation in ac/dc conversion mode is achieved through variable frequency modulation, and soft-switching is maintained for all switches for all the operating condition in both modes. The performance of the proposed bidirectional converter is validated through a 1 kW, 120 V rms/750 V dc proof-of-concept prototype.
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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 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".