Influence of higher harmonics in the end region magnetic field on eddy currents in the stator clamping system of hydro generators

Schmidt, Erich; Traxler-Samek, G.; Schwery, A.

doi:10.1109/iemdc.2005.195885

Cited by 11 publications

(1 citation statement)

References 16 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the time-stepping FEAs, the governing equation was (8) where is reluctivity; and and are magnetic vector potential and source current density, respectively.…”

Section: B Time-stepping Feasmentioning

confidence: 99%

Analysis of Eddy-Current Loss in End Shield and Frame of a Large Induction Machine

2010

View full text Add to dashboard Cite

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Aalto University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubspermissions@ieee.org.By choosing to view this document, you agree to all provisions of the copyright laws protecting it. This paper proposes an effective method of analyzing the eddy-current loss within the end shield and frame of an electric machine. The standard impedance boundary condition is applied to the conducting surfaces of complete 3-D models, and the models are solved by time-harmonic finite-element analyses. Measurement of the temperature rise is completed as a validation of the proposed method. The effect of the distances between the conducting surfaces and coil ends is studied by computing the eddy-current loss for a series of 3-D models having different distances. In addition, simplified 2-D models are used to study the influence of material nonlinearity. In brief, the proposed method is feasible in computing the eddy-current loss. The eddy-current loss within the regions close to the coil ends is larger than the other regions in the end shield and frame, but the total loss is quite small, compared, for instance, with the copper loss within the stator winding. Furthermore, the farther the end shield and frame are from the coil ends, the smaller the eddy-current loss is. Finally, it is found that the eddy-current loss is larger in the nonlinear case than in the linear case.

show abstract

“…In the time-stepping FEAs, the governing equation was (8) where is reluctivity; and and are magnetic vector potential and source current density, respectively.…”

Section: B Time-stepping Feasmentioning

confidence: 99%