Single Carrier-Based Pulse Width Modulator for Modular Multilevel Converters
Bibliographic record
Abstract
Carrier-based pulse width modulation (PWM) schemes are the preferred choice for modular multilevel converters (MMCs) due to their simplicity and ease of implementation. However, the required number of carriers for gating signal generation drastically increases with the number of submodules (SMs) in an MMC. These carriers should be accurately synchronized with each other to generate the high-quality output voltage and current waveforms. However, it is difficult to achieve the synchronization due to the memory constraints, sampling issues, computational delays, and control complexity. To overcome these issues, a simple single carrier-based PWM modulator is proposed in this paper. In addition, a simple SM capacitor voltage-balancing approach with less computational burden is presented. The proposed scheme can be easily applied to the n-level MMC without any modifications and applicable to any SM type. The effectiveness of the proposed modulation scheme and SM capacitor voltage balancing algorithm is demonstrated through the simulations in the PLECS®software platform.
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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) | 0.003 | 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".