An asymmetrical half-bridge active DC filter for industrial drive systems using multipulse utility rectifiers with harmonic reducing input transformers
Bibliographic record
Abstract
The operation of parallel-connected multi-pulse 3-phase rectifiers are described that use isolating and also non-isolating multi-winding input transformers. The performance of these rectifiers are analysed with unbalanced transformer output voltages and inductances. The rectifier operation is more sensitive to these imbalances the larger the number of parallel bridges used. Auto-transformers require inter-phase blocking reactors to balance the rectifier input currents. A multi-pulse PWM asymmetrical half-bridge DC filter is examined that can be used to balance the rectifier currents under unbalanced supply conditions and and when using an auto-transformer. The power electronics can be rated at less than 20% voltage and make the matching of the transformer output voltage and inductance non-critical. When using auto-transformers, interphase blocking inductors can also be eliminated. This paper describes the unipolar PWM switching control technique for the asymmetrical half-bridge in an 18-pulse diode rectifier and discusses the bridge voltage ratings.
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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 | 0.001 |
| 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".