A New Fully Soft-Switched, Single-Stage LLC Resonant Based Grid Connected Inverter
Bibliographic record
Abstract
A new single-stage fully soft-switched resonant grid-connected inverter is proposed in this paper. The proposed inverter is able to provide ZVS turn-on for all the switches without requiring complex switching modulation or using additional passive auxiliary circuits. A front-end half-bridge LLC resonant inverter is connected to a high frequency AC link, where galvanic isolation is provided. On the secondary side of the high frequency AC link, two switch pairs are controlled with sinusoidal PWM and they are connected to an output LC-type filter to provide the required sinusoidal grid side current. The operating stages of the proposed circuit and the circuit’s characteristics are discussed. A closed loop control algorithm based on a proportional resonant and a harmonic compensator controller is implemented so that the output grid current is synchronized with the grid voltage and can achieve very low THD. Results are provided on 1.5kW system, an input voltage range of 200–300V and an AC output voltage of 120Vac,rms with a switching frequency of 103 kHz to validate the performance of the proposed inverter.
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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 | 0.000 | 0.001 |
| 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".