Title :
Analytical prediction of rotor eddy current loss due to stator slotting in PM machines
Author :
Wills, Dominic A. ; Kamper, Maarten J.
Author_Institution :
Univ. of Stellenbosch, Matieland, South Africa
Abstract :
Certain types of PM electric machines are particularly susceptible to the proliferation of eddy currents flowing within the solid conducting regions in the rotor. These eddy currents can be induced by current winding harmonics, but also by the interaction of the static rotor magnetic field with the permeance variation of the slotted stator known as `slotting´. This work focuses on the analytical calculation of eddy current loss that occurs in the conducting regions within a rotor under no-load conditions. The results are compared with finite element analysis and measured results from a machine test. Good agreement is achieved between the three methods of comparison.
Keywords :
eddy current losses; finite element analysis; machine testing; permanent magnet machines; rotors; stators; current winding harmonics; finite element analysis; machine testing; permanent magnet machines; rotor eddy current loss; static rotor magnetic field; stator slotting; Eddy currents; Harmonic analysis; Loss measurement; Rotors; Solids; Stator windings; analytical; eddy current; finite element; losses; permanent magnet; rotor yoke; slotting;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2010 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-5286-6
Electronic_ISBN :
978-1-4244-5287-3
DOI :
10.1109/ECCE.2010.5617876