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Proceedings Paper

Optical fibre bragg gratings based magnetic force measurement of magnetic bearings
Author(s): Guoping Ding; Zude Zhou; Yefa Hu; Jianhua Zhou
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Paper Abstract

Magnetic bearings are typical electromechanical systems of high performance. Current-displacement-force relationship between stator and rotor is an important research topic of magnetic bearings. The critical issue is to realize magnetic force online dynamic measurement. This paper presents a novel method on magnetic force measurement of magnetic bearings with optical fibre bragg gratings (FBG), which realizes a non-contact and online force measurement with simple configuration, good noise immunity even when the rotor is running. A novel micro force transducer is designed and fabricated, which is mounted within the stator magnetic pole. To obtain current-displacement-force relationship a FBG based magnetic force measurement test rig is setup to simulate magnetic bearing working states as the stator coils currents, air gap between stator and rotor, rotor speed is adjustable. Magnetic force is measured under three classifications of test conditions and test results are presented. The measurement data show good consistency with the theory analysis and calculation, which means that the FBG based magnetic force measurement is available and of good accuracy.

Paper Details

Date Published: 31 December 2008
PDF: 6 pages
Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71303K (31 December 2008); doi: 10.1117/12.819687
Show Author Affiliations
Guoping Ding, Wuhan Univ. of Technology (China)
Zude Zhou, Wuhan Univ. of Technology (China)
Yefa Hu, Wuhan Univ. of Technology (China)
Jianhua Zhou, Wuhan Univ. of Technology (China)


Published in SPIE Proceedings Vol. 7130:
Fourth International Symposium on Precision Mechanical Measurements
Yetai Fei; Kuang-Chao Fan; Rongsheng Lu, Editor(s)

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