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
Cranfield University

Typ

Artikel

Journal

CIRP Annals - Manufacturing Technology

Band

70

Seiten

419-422

Anzahl der Seiten

4

ISSN

0007-8506

Publikationsdatum

2021

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Maschinenbau, Wirtschaftsingenieurwesen und Fertigungstechnik

Elektronische Version(en)

https://doi.org/10.15488/10978 (Zugang: Befristet gesperrt)
https://doi.org/10.1016/j.cirp.2021.04.092 (Zugang: Geschlossen)