Analytical prediction of rotor eddy current loss due to stator slotting in PM machines
Paper presented during the 2010 IEEE Conference, Electrical Machines and Systems, 2001. ICEMS 2001, Shenyang . The original publication is available at http://research.ee.sun.ac.za/emr/files/u1/2010-ECCE-Wills.pdf and also http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=971799&tag=1
Wills, D. A. & Kamper, M. J.2010. Analytical prediction of rotor eddy current loss due to stator slotting in PM machines, in Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference, 2:806 - 809, doi:10.1109/ICEMS.2001.971799.
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.