Fast Transient DC-Bus Dynamics in GaN-based PFCs: Dual-Loop Geometric Control
Bibliographic record
Abstract
Single-phase Power Factor Correction (PFC) converters require high DC-bus capacitances to cope with the double-line frequency power pulsation. This affects cost and size of the converter, and it creates high inrush currents. With the ongoing high-power-density trends in GaN-based converters, it is crucial to reduce the size of components, including DC-bus capacitors. This paper introduces a fast-transient geometric PFC controller on a GaN-based modified bridgeless converter capable of operating at 1 MHz switching frequency. The proposed controller is based on large-signal state-plane modeling and it addresses the sluggish dynamic performance of the conventional DC-bus voltage controller, enabling the utilization of a significantly reduced DC-bus capacitor. As a result, the inrush current is reduced and ceramic DC-bus capacitors can be employed, which increases the reliability, and it offers rapid response to load transients. The analysis of this paper is supported by mathematical derivations and validated via simulations and experimental results.
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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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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".