Optical fibre Bragg gratings based magnetic force measurement of magnetic bearings

Guoping Ding; Zude Zhou; Yefa Hu; Jianhua Zhou

doi:10.1117/12.819687

31 December 2008 Optical fibre bragg gratings based magnetic force measurement of magnetic bearings

Guoping Ding, Zude Zhou, Yefa Hu, Jianhua Zhou

Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 71303K (2008) https://doi.org/10.1117/12.819687
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China

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.

Citation Download Citation

Guoping Ding, Zude Zhou, Yefa Hu, and Jianhua Zhou "Optical fibre bragg gratings based magnetic force measurement of magnetic bearings", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71303K (31 December 2008); https://doi.org/10.1117/12.819687

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