TY - GEN
T1 - Comparison of rotor eddy current losses in permanent magnet motor and generator
AU - Zhao, Nannan
AU - Zhu, Z. Q.
AU - Liu, Weiguo
PY - 2011
Y1 - 2011
N2 - In this paper, the rotor eddy current loss of surface-mounted permanent magnet (SPM) machine is predicted using a simplified analytical model, which accounts for curvature, time and space mmf harmonics, and is applicable to calculate the eddy current loss in both permanent magnets and sleeve, but neglects the influence of stator slotting and eddy current redistribution effect. The analytical method is employed to research two identical prototype SPM machines when they are back-to-back connected mechanically and used as a motor and a generator, respectively. Finite element analysis (FEA) is employed to validate the model. Thermal fields are analyzed using analytical lumped-circuit method based on the obtained eddy current loss and the predicted temperature rises of machines are compared with the measured results. Good agreement between analysis and measurement is achieved. The analysis in this paper reveals that the time harmonics significantly influence the eddy current loss and temperature rises in magnets and sleeve of motor, which causes large difference in temperature rises of the motor and generator.
AB - In this paper, the rotor eddy current loss of surface-mounted permanent magnet (SPM) machine is predicted using a simplified analytical model, which accounts for curvature, time and space mmf harmonics, and is applicable to calculate the eddy current loss in both permanent magnets and sleeve, but neglects the influence of stator slotting and eddy current redistribution effect. The analytical method is employed to research two identical prototype SPM machines when they are back-to-back connected mechanically and used as a motor and a generator, respectively. Finite element analysis (FEA) is employed to validate the model. Thermal fields are analyzed using analytical lumped-circuit method based on the obtained eddy current loss and the predicted temperature rises of machines are compared with the measured results. Good agreement between analysis and measurement is achieved. The analysis in this paper reveals that the time harmonics significantly influence the eddy current loss and temperature rises in magnets and sleeve of motor, which causes large difference in temperature rises of the motor and generator.
UR - http://www.scopus.com/inward/record.url?scp=83355177614&partnerID=8YFLogxK
U2 - 10.1109/ICEMS.2011.6073324
DO - 10.1109/ICEMS.2011.6073324
M3 - 会议稿件
AN - SCOPUS:83355177614
SN - 9781457710445
T3 - 2011 International Conference on Electrical Machines and Systems, ICEMS 2011
BT - 2011 International Conference on Electrical Machines and Systems, ICEMS 2011
T2 - 2011 International Conference on Electrical Machines and Systems, ICEMS 2011
Y2 - 20 August 2011 through 23 August 2011
ER -