| Titre : |
Strong ball bearing, smaller motors : Implementing more powerful electric motors with PA46 |
| Type de document : |
texte imprimé |
| Auteurs : |
Adnan Hasanovic, Auteur ; Anthony Simonin, Auteur ; Jos Bellemakers, Auteur ; Tamim Sidiki, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 48-51 |
| Langues : |
Anglais (eng) |
| Catégories : |
Matières plastiques dans les automobiles
Moteurs électriques
Polyamide 46
Roulements à billes
Véhicules électriques
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Ball bearings in electric cars have to meet higher requirements than in vehicles with combustion engines. The trend towards smaller electric motors with higher speeds is further reinforcing this. A material alternative to the usual PA66 and PEEK is available for implementation. |
| Note de contenu : |
- E-cars : fewer bearings, higher requirements
- Weight reduction drives up requirements
- Which materials can be used ?
- Failure modes with plastic bearing
- Durable and compact cages
- Fig. 1 : E-axle combining the e-motor and reducer in one unit: Manufacturers of electric vehicles are trying to save weight at this point
- Fig. 2 : SKF hybrid ball bearings with ceramic balls: Hybrid bearings with ceramic rolling elements are the most reliable and efficient variants for preventing electrical erosion caused by stray currents
- Fig. 3 : SKF deep groove ball bearings using a polymer cage: The plastic bearing cage holds the rolling elements in the correct position. It must be resistant to mechanical and chemical stresses and ensure low friction
- Fig. 4 : Cage deformations (left) and cage failures (right) are caused by high rotational speeds and centrifugal loads, among other things
- Fig. 5 : The higher material stiffness of the PA46 reduced the cage deformations
- Fig. 6 : Fatigue strength (left) and strength retention after exposure to 150 °C hot oil (right) for glass fiber-reinforced PA66 and PA46. PA46 performs better in both cases |
| En ligne : |
https://drive.google.com/file/d/1DOIf90rpHWAwNd4_2gRXz1RAagpbPDs-/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40951 |
in PLASTICS INSIGHTS > Vol. 114, N° 2-2024 (2024) . - p. 48-51
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