Comparative Performance Analysis of Copper and Aluminum Wound Fractional–Slot PMSMs for High–Speed Traction Application
Bibliographic record
Abstract
This paper performs a comprehensive comparative analysis of copper and aluminum wound permanent magnet synchronous machines (PMSMs) for high– speed application. While general studies have been conducted in literature on copper and aluminum windings in terms of conductivity, losses and mass density, the impact of these winding materials on the overall machine performance has not been analyzed broadly. Thus, this paper considers a fractional– slot wound PMSM developed for high–speed traction application and analyzes the performance with copper and aluminum windings in terms of torque density, peak efficiency, operating speed range and variation of winding losses with temperature. Furthermore, in order to assess these machines traction capability, a drive–cycle based analysis is conducted for common drive cycles including urban, highway and worldwide lightweight test cycle (WLTC) for a commercially available Ford Focus vehicle. Performance characteristics in terms of torque–speed characteristics and maximum energy density efficiency were compared for both machines.
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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 | 0.001 |
| 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 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".