Turn insulation aging of motors exposed to fast pulses of inverter drives
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
The effects of fast pulses from PWM inverter AC drives on motor insulation are not well understood and their impact on long term reliability is not known. Turn insulation stresses have been simulated on small "layer-to-layer" specimens subjected to typical pulses of 120 ns rise-time at a repetition rate of 10 kHz. Voltage pulse overshoots reached 920 V. Under these conditions no partial discharge was detected. Measurements of capacitance, dielectric losses, relaxation currents, return voltage and thermally stimulated current (TSC) have been used to characterise insulation modifications resulting in the cumulative effects of multiple pulses. Preliminary results indicated that changes in the dielectric properties after a short exposure (1310 hours) to voltage alone were negligible. When specimens were exposed to both temperature and voltage, TSC results showed that some modifications of the dielectric properties could be initiated after short exposure time, even below the partial discharge inception voltage.
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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) | 0.000 | 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 it