Motor Drive with Halbach Permanent Magnet Array for Urban Electric Vehicle Concept
Bibliographic record
Abstract
Permanent Magnet Synchronous Motor (PMSM) with Halbach array increases the fundamental component of the electromotive force, while decreasing the higher harmonics of the PM flux. This allows motors with lower copper losses and lower iron losses due to the absence of higher harmonics in the stator core. Reduction of the no-load losses is of particular high interest for traction applications where a vehicle runs at a rather constant speed. The Urban Vehicle (UV) concept is a one-seater vehicle with light chassis and solar panels. The solar panels allow substantial reduction of the battery size. In UV running at vehicle speeds in the 30 - 50 km/h range, the PMSM iron losses become one of the main contributors of losses and special attention must be paid to the reduction of no-load losses in the motor. In the paper, a PMSM motor with Halbach rotor is built and tested for one-seater vehicle of 90 kg mass and a 0.6 m2 solar panel. At 30 km/h, the power provided by the 0.9 kg Li-Po battery is 78 W and the power consumed by the PMSM with Halbach array is 47 W. Special attention is given in the paper to the no-load losses in the PMSM with Halbach array.
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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 | 0.000 |
| 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 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".