Position sensor for active magnetic bearing with commercial linear optical encoders

verfasst von
Mathias Tantau, Paul Morantz, Paul Shore
Abstract

Active magnetic bearings are used in a number of applications but their disadvantage is the high asynchronous error due to sensor noise amplification. In this paper a new radial position sensor for active magnetic bearings (AMB) based on linear optical encoders is presented. A commercial encoder scanning head faces a round scale with concentric, coplanar lines on its face. Because such a scale is not readily available, it is made by high precision micro machining and different options are compared. In experiments a measurement noise of 3.5 nm at 10 kHz bandwidth is achieved. In addition, a magnetic bearing is built to demonstrate the sensor in closed-loop.

Organisationseinheit(en)
Institut für Mechatronische Systeme
Externe Organisation(en)
National Physical Laboratory
Typ
Artikel
Journal
CIRP Annals - Manufacturing Technology
Anzahl der Seiten
4
ISSN
0007-8506
Publikationsdatum
22.08.2021
Publikationsstatus
Angenommen/Im Druck
Peer-reviewed
Ja
Elektronische Version(en)
https://doi.org/10.15488/10978 (Zugang: Offen)