A4 Conference proceedings

Unbalanced Magnetic Pull Analysis for Rotordynamics of Induction Motors

Publication Details
Authors: Kim Heesoo, Nerg Janne, Choudhury Tuhin, Sopanen Jussi
Publication year: 2020
Language: English
Related Journal or Series Information: Proceedings (International Conference on Electrical Machines)
Title of parent publication: 2020 International Conference on Electrical Machines (ICEM)
Journal acronym: ICEM
ISBN: 978-1-7281-9946-7
eISBN: 978-1-7281-9945-0
ISSN: 2381-4802
eISSN: 2473-2087
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication


This study investigates the characteristics of unbalanced magnetic pull (UMP) and its effect on the rotordynamics of induction motors. The UMP calculation method utilizes a simple analytical UMP model. To improve the accuracy of the result, the magnetizing currents and correction factor functions are calculated at different slip and air-gap eccentricity values using Finite Element Analysis (FEA). The obtained results are incorporated into the analytical UMP equation. Utilizing this method, the variation of UMP force and stiffness due to the change in slip, eccentricity, supply frequency and the relative location of the shortest air gap with magnetic flux by one pole of the stator is investigated in case of 30 kW induction motor. In addition, the dynamic behavior of the motor is simulated and the effect of UMP in rotordynamics is defined.

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Last updated on 2021-16-03 at 12:47