Towards a general method for estimating the unbalanced magnetic pull in mixed eccentricities motion including sufficiently large eccentricities in a hydropower generator and their validation against EM simulations

Calleecharan, Yogeshwarsing; Jauregui, Ricardo; Aidanpää, Jan-Olov

doi:10.1051/epjap/2013130092

Cited by 5 publications

(2 citation statements)

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“…UMP can further lead to the bending of the shaft, reduction of the mechanical stiffness of the shaft and even serious dry friction between the rotor and the stator. The relationship between motor eccentricity and the UMP for electric machines have been studied using analytical methods and finite element analysis (FEA) [8][9][10]. In [8], a simplified analytical technique for predicting UMP in PM machines due to eccentricity is discussed.…”

Section: Introductionmentioning

confidence: 99%

“…In [8], a simplified analytical technique for predicting UMP in PM machines due to eccentricity is discussed. In [9], purely static and dynamic eccentricities are comprehensively studied, and UMP for these two eccentricities and mixed eccentricity are analysed. In [10], the analytical method of calculating UMP in a rotating coordinate frame was shown.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of unbalanced magnetic pull in eccentric interior permanent magnet machines with series and parallel windings

Jiang

Bilgin

Sathyan

et al. 2016

IET Electric Power Applications

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The effects of different winding connections, i.e. series, parallel, and series-parallel combined windings is studied, on the unbalanced magnetic pull (UMP) in an interior permanent magnet synchronous machine (IPMSM) with eccentricity applied. Three types of eccentricities, i.e. static, dynamic, and mixed eccentricities, are investigated. Four types of winding connections are examined and the contributing factors, such as air gap difference, current redistribution, and slot effect on the UMP are analysed. FFT analysis and UMP distribution patterns are used to compare the four types of winding connections. The results show that the current redistribution generated by the parallel connections of the windings results in reduction of UMP for IPMSM with eccentricity.

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