Analytical time-harmonic approach to calculate rotor eddy-current losses due to stator harmonics

Author

Cui, Xiaoli ; Haldemann, Johann

Author_Institution

Turbogenerators R&D Dept., ALSTOM (Switzerland) Ltd., Switzerland

fYear

2012

fDate

2-5 Sept. 2012

Firstpage

85

Lastpage

91

Abstract

This paper describes an analytical approach to determine the losses in the rotors of synchronous machines due to stator space and time harmonics. Based on the formulation of electro-magnetic waves in the cylindrical coordinate system, different geometrical layouts and winding arrangements have been investigated. The analytically calculated results of eddy-current losses in different parts of the rotor, such as damper wedges, massive iron parts, screens and permanent magnets, are compared with numerical calculations, showing good coincidence. Analytical approaches help to understand the physics and allow optimal solutions to be found in a fast but still accurate way.

Keywords

eddy current losses; finite element analysis; harmonic analysis; machine theory; rotors; stators; synchronous machines; analytical time-harmonic approach; cylindrical coordinate system; damper wedges; electromagnetic waves; finite element methods; geometrical layouts; massive iron; permanent magnets; rotor eddy-current losses; stator harmonics; synchronous machines; winding arrangements; Equations; Harmonic analysis; Iron; Magnetic flux; Rotors; Shock absorbers; Vectors; Analytical models; Eddy currents; Finite element methods; Harmonic analysis; Magnetic fields; Permanent magnets;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2012 XXth International Conference on

Conference_Location

Marseille

Print_ISBN

978-1-4673-0143-5

Electronic_ISBN

978-1-4673-0141-1

Type

conf

DOI

10.1109/ICElMach.2012.6349844

Filename

6349844