Modeling of Electrodynamic Bearings

被引：27

作者：

Amati, Nicola ^{[1
]}

De Lepine, Xavier ^{[1
]}

Tonoli, Andrea ^{[1
]}

机构：

[1] Politecn Torino, Mechatron Lab, Dept Mech, I-10129 Turin, Italy

来源：

JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME | 2008年 / 130卷 / 06期

关键词：

eddy current; induction bearing; rotordynamics; stability; electromechanical interaction;

D O I：

10.1115/1.2981170

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A new model of electrodynamic bearings is presented in this paper. The model takes into account the R-L dynamics of the eddy currents on which this type of bearing is based, making it valid for both quasistatic and dynamic analyses. In the quasistatic case, the model is used to obtain the force generated by an off-centered shaft rotating at a fixed speed in a constant magnetic field. The model is then used to analyze the dynamic stability of a Jeffcott rotor supported by electrodynamic bearings. The essential role played by nonrotating damping in ensuring a stable operating range to the rotor is studied by means of root loci. Comparison with literature results is finally used to validate the model.

引用

页数：9

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