Analysis of Unbalanced Magnetic Pull in a multi-physic model of induction machine with an eccentric rotor

Xiaowen Li (1) , A. Bourdon (1) , D. Remond (1) , S Koechlin (2) , D Prieto (2)

1 LaMCoS - Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]
2 Moteurs Leroy-Somer ,16 boulevard Marcellin Leroy 16000, Angoulême, France

Based on a multi-physic model of an asynchronous electrical machine with a strong electro-magneto-mechanical interaction, the Unbalanced Magnetic Pull (UMP) generated from the uneven air-gap due to the rotor eccentricity is calculated and discussed. The proposed model includes strong couplings between mechanical, magnetical and electrical behaviors, particularly the relationship between angle sampling and time sampling about the rotor position which introduces the Instantaneous Angular Speed. Simulations with different input static eccentricity values are investigated in rated operation and the effects of UMP on the dynamic behavior of the whole system are analysed. Vibration analysis is performed at the supports to extract information in vibration signals for eccentricity monitoring.

Mots clés: unbalanced Magnetic Pull (UMP); asynchronous electrical machine; eccentric rotor; rotor center orbit; multi-physic model; unbalanced Magnetic Pull (UMP)

Domaines: Sciences de l'ingénieur [physics]

Xiaowen Li, A. Bourdon, D. Remond, S Koechlin, D Prieto. Analysis of Unbalanced Magnetic Pull in a multi-physic model of induction machine with an eccentric rotor. 2nd World Congress on Condition Monitoring, Dec 2019, Singapore, Singapore. ⟨10.3850/978-981-11-0744-3⟩. ⟨hal-02977541⟩