Impact of Wide-Bandgap Devices on Turn-to-Turn Insulation Performance in Hairpin Windings for Electric Vehicle Traction Motors
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Bibliographic record
Abstract
This study examines the performance of turn-to-turn insulation in hairpin windings of electric vehicle motors when exposed to stress conditions representative of wide-bandgap (WBG) power converter operation. Using corona-resistant rectangular enameled wires, back-to-back samples were fabricated to emulate turn-to-turn insulation and were subjected to 24-hour aging under high-voltage unipolar pulses with a 40 ns rise time. The tests explored the effects of pulse overshoot (10%, 20%), switching frequency (5 kHz, 10 kHz), and duty cycle (20%, 50%). Insulation performance was assessed through partial discharge inception voltage (PDIV) and dissipation factor (%DF) measurements before and after aging. Results showed the intensity of the turn-to-turn insulation damage of hairpin winding under PD activities caused by WBG drives.
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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 | 0.001 | 0.001 |
| 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