| Titre : |
Energy-efficient use of drives : Process-oriented design of the main drive for the extruder |
| Type de document : |
texte imprimé |
| Auteurs : |
Dieter Drescher, Auteur ; Christian Angsmann, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 102-106 |
| Langues : |
Anglais (eng) |
| Catégories : |
Efficacité énergétique
Extrudeuses
Moteurs
Systèmes d'entrainement (technologie)
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Manufacturers of standard extruders sometimes incorporate oversized drives into their machine designs in order to be able to cover a wide range of requirements. In times of high energy prices, however, this is no longer economical. An extruder should be equipped with a drive package that is matched to the gearbox and the processing unit. But what are the requirements governing the design of the drive system ? |
| Note de contenu : |
- Requirements imposed on the extruder main drive
- Properties of different motors
- Machine-specific drive dimensioning
- Performance-optimized design
- Fig. 1 : Efficiencies of the considered motor types at the rated point with a rated motor power of approx 45 kW
- Fig. 2 : Power flow of the extruder main drive : losses occur in the frequency inverter, motor and gear
- Fig. 3 : Field weakening range : while the motor power of a three-phase asynchronous motor initially rises linearly with the speed when the inverter is fed in, it remains constant from the rated frequency (fn) onward. Above this, the previously constant torque drops slightly
- Fig. 4 : Operating mode of the same motor with and without field weakening with optimized overall ratio
- Fig. 5 : Setting for constant torque range to field weakening range (same drive, increased ratio)
- Fig. 6 : Comparison of stator designs : an inverter-optimized three-phase asynchronous motor of 44 kW output is considerably more compact than the standard motor behind it, which is only slightly more powerful at 45 kW
- Table 1 : Requirements imposed on extruder main drive
- Table 2 : Example dimensioning of a three-phase drive with and without field weakening |
| En ligne : |
https://drive.google.com/file/d/1aC5G_nirlAm-xwUFz9VQpdIZIzLgXh0I/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33175 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 102-106
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