Rotational Core Loss and Permeability Measurements in Machine Laminations with Reference to Permeability Asymmetry
Bibliographic record
Abstract
Rotational core loss and vector magnetization in electrical steel laminations are investigated under the circular 2D rotating field. The loss under a rotating field is compared with the loss under a pulsating field, and the behavior of the dynamic hysteresis loops in both cases are explained with reference to permeability asymmetry. The permeability of the magnetic material under the rotating field tends to change based on the flux direction. Experimental data is obtained using a new test fixture based on an electromagnetic Halbach array, which is capable of measuring rotational and pulsating losses in circular steel laminations. The measurements were performed for M15 gauge 29 electrical steel material at three typical frequencies of industrial interest (60 Hz, 400 Hz, and 1 kHz), and results are presented and discussed. It is found that there is a relation between the direction of applied field and the permeability, in addition to a strong effect on the permeability in the case of rotational flux when compared to pulsating flux.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.001 | 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 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".