Increasing the threshold of vibration stability of soft mounted induction motors with elastic rotors and sleeve bearings using active motor foot mounts

  • In the paper, the threshold of vibration stability of induction motors with flexible shafts and sleeve bearings, mounted on soft steel frame foundations with active motor foot mounts, is analyzed. The developed model is based on a multibody model, considering electromagnetic influence, stiffness and internal damping of the rotor, stiffness and damping of the bearing housings and end shields, stiffness and damping of the foundation and stiffness and damping of the oil film of the sleeve bearings. Additionally the stiffness and damping of the motor foot mounts – which are positioned between the motor feet the soft steel frame foundation – are considered, as well as the controlled forces which are applied in the vibration system by the motor foot mounts, using PD-controllers. The aim of the paper is to unite all these influences in a mathematical model and to derive a procedure for calculating the threshold of vibration stability. Based on a numerical example it can be shown, that the threshold of stability can be pushed to very highIn the paper, the threshold of vibration stability of induction motors with flexible shafts and sleeve bearings, mounted on soft steel frame foundations with active motor foot mounts, is analyzed. The developed model is based on a multibody model, considering electromagnetic influence, stiffness and internal damping of the rotor, stiffness and damping of the bearing housings and end shields, stiffness and damping of the foundation and stiffness and damping of the oil film of the sleeve bearings. Additionally the stiffness and damping of the motor foot mounts – which are positioned between the motor feet the soft steel frame foundation – are considered, as well as the controlled forces which are applied in the vibration system by the motor foot mounts, using PD-controllers. The aim of the paper is to unite all these influences in a mathematical model and to derive a procedure for calculating the threshold of vibration stability. Based on a numerical example it can be shown, that the threshold of stability can be pushed to very high rotor speeds, using active motor foot mounts.show moreshow less

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Metadaten
Author:Ulrich WernerORCiD
URL / DOI:https://past.isma-isaac.be/downloads/isma2018/proceedings/Proceedings_ISMA-USD2018.pdf
Parent Title (English):Proceedings of ISMA2018 including USD2018
Editor:Ulrich WernerORCiD
Document Type:conference proceeding (article)
Language:English
Date of first Publication:2018/09/17
Reviewed:Begutachtet/Reviewed
Release Date:2025/12/12
Tag:Active vibration control; Induction motors; Motor foot mounts; Sleeve bearings; Threshold of stability
Pagenumber:2509-2523
Konferenzangabe:ISMA-International Conference on Noise and Vibration Engineering, 2018, Leuven, Belgium
institutes:Institut für leistungselektronische Systeme ELSYS
Research Themes:Energie & Ressourcen
Licence (German):Keine Lizenz - Deutsches Urheberrecht gilt
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