A novel combined approach to voltage sag ride-through and current waveform improvement for adjustable-speed drives
Bibliographic record
Abstract
A combined sub-circuit with voltage compensation and harmonic modulation is proposed to improve the voltage sag ride-through capability of adjustable-speed drives (ASD) with improved AC mains current waveform. The voltage compensation and harmonic modulation circuits share the same Y/sub 0///spl Delta/ connected interface transformer. The harmonic modulation module injects a calculated amount of third harmonic current through the neutral at the primary side of the interface transformer and improves line current waveform. Upon detection of a voltage sag, the voltage compensation rectifier, supplied from the secondary of the interface transformer, outputs a controlled DC voltage in series with the reduced main rectifier's output and thus keeps the DC-bus voltage at the desired level. Operating principle of the combined sub-circuit is presented. The theoretical analysis is verified by simulation using SABER and PSIM software. Some experimental results on a 12.5 kW prototype converter with third harmonic modulation are presented.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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) | 0.000 | 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 teacher head, 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".