Arc-Free Bidirectional Hybrid DC Switch using Tungsten or Tungsten-clad Copper Contacts
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
A hybrid DC switch has been studied intensively because of the increasing demand for photovoltaic power stations and DC power distribution systems. The hybrid DC switch, consisting of mechanical contacts, semiconductor devices, and metal-oxide varistors, has the advantages of low contact resistance, high-speed current interruption, and a short-duration arc during current commutation. Moreover, arc-free current interruption is possible if the boiling voltage of the contact material exceeds the circuit voltage needed for turning on the semiconductor devices. A combination of tungsten contacts and SiC-MOSFETs satisfies this condition. As a result, an arc-free current interruption of 220 A was achieved with two-pole-tungsten contacts for bidirectional DC switching, where two SiC-MOSFETs were connected in series. The newly developed tungsten-clad copper contacts increased the threshold current of arc-free commutation up to 260 A.
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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) | 0.002 | 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 it