Sinusoidal Shaped Surface Permanent Magnet Motor Using Cold Spray Additive Manufacturing
Bibliographic record
Abstract
With the global trend towards electrification of transport, the interest in various configurations of electric motors is growing. Several applications require low torque pulsations as it can lead to mechanical vibrations and acoustic noise. Optimization of the shape of the rotor permanent magnet (PM) has been the most effective technique for reducing torque pulsations. Unfortunately, the low versatility of the motor magnet fabrication technologies limits the development of new motor geometries. Cold spray additive manufacturing is used for shaping PMs for the direct fabrication of electric motor parts without the need for additional assembly steps. This fabrication technique allows an increase in the design flexibility of electrical machine geometries targeting improved performance. This paper presents rotor PM shaping design for radial flux inner rotor surface permanent magnet synchronous machines (SPMSM). PMs being shaped according to a sinusoid along the axial direction while the thickness of the magnet is kept uniform along the radial direction. The performance of the machine with sinusoidal shaped rotor PM (Model-B) is compared against a conventional rectangular shaped rotor PM (Model-A) design. The effect of sinusoidal shaped rotor PM shape on flux linkage, load torque, cogging torque and back EMF is analyzed and simulated using the 3-D finite-element method for both models. Also, the magnetization current magnitude required to completely magnetize the rotor PM fabricated using cold spray additive manufacturing is calculated.
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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) | 0.002 | 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".