Hardware Design and Implementation of an Electromagnetic Levitation System in an Additive Manufacturing Environment
Notice bibliographique
Résumé
Magnetic Levitation and Additive Manufacturing are two promising fields with ever growing interest in several industrial settings. There is, however, negligible overlap between the two fields. This research aims to combine the ability of electromagnetism to successfully levitate an aluminum disc using Electrodynamic Suspension (EDS), with Laser Powder Bed Fusion (LPBF) based additive manufacturing to enhance the complexity of fabricated objects. This provides a higher degree of freedom for manufacturing, and gives the user the ability to deposit material on the flip side of substrate, all through just one print activity. \n \nElectromagnetic system designed for this research comprises of two sets of oppositely wound concentric coils, seated in a pure-iron core. An aluminum disc is selected for levitation purposes due to its high compatibility with the additive manufacturing environment. ANSYS Maxwell, a FEMM based software is selected for design of the system. The coils are optimized for high levitation forces in the axial (Z-axis) direction, as well as restoration forces in the lateral (R-axis) direction using a 5ARMS input supply, in the range of 50 - 1000Hz. A thermal analysis is conducted to ensure system suitability for 20 minutes of activity in an additive manufacturing machine. \n \nIntrinsic coil parameters such as inductance and its reactance effects are investigated through resonant frequency and time constant step response analyses. Low and high voltage experiments are conducted to correlate system output current and magnetic field density with simulations. An enclosure is constructed according to CSA (Canadian Standards Association) guidelines to perform experiments at 300VRMS , 1.5kW. \n \nExperimental debugging is performed to tune system performance to optimal capability. The relative permeability of the core is studied at low magnetic field density outputs and corrected accordingly. The strength of coils is established, and magnetomotive force of the overall system is increased using a custom variable resistor setup in parallel with one set of coils. The levitative ability of the system is improved and matched to simulations. Finally, levitation is accomplished, with and without a payload suspension, to show viability for additive manufacturing applications. \n \nFuture work is discussed to expand further on current progress and highlight drawbacks of the established system. Recommendations are made to modify system components based on their material and geometric characteristics. A possible control model is discussed to ensure stability of levitation. The viability of magnetic levitation for additive manufacturing is hence established, and novel results are presented.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».