DocumentCode :
3209812
Title :
Design Tradeoffs between Stator Core Loss and Torque Ripple in IPM Machines
Author :
Han, Seok-Hee ; Jahns, T.M. ; Zhu, Z.Q.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Wisconsin - Madison, Madison, WI
fYear :
2008
fDate :
5-9 Oct. 2008
Firstpage :
1
Lastpage :
8
Abstract :
High stator core losses can pose a significant problem in IPM machines operating over wide constant-power speed ranges. At lower speeds, the torque ripple can be undesirably large in some IPM machine designs, contributing to acoustic noise and vibration. While previous work has addressed these two problems independently, this paper shows that the conditions for reducing stator core losses during flux-weakening operation, dominated by harmonic eddy-current losses in the stator teeth, can conflict with the conditions for reducing the torque ripple of IPM machines. It is also shown that the resulting design tradeoffs depend on the details of the IPM machine topologies that are under consideration. The appropriate IPM machine topologies that offer more favorable tradeoffs are identified in order to achieve the best possible compromise of high-speed stator core losses and torque ripple characteristics.
Keywords :
eddy current losses; magnetic flux; permanent magnet machines; stators; torque; IPM machines; acoustic noise; flux-weakening operation; harmonic eddy-current losses; machine topologies; stator core loss; torque ripple; vibration; Acoustic noise; Core loss; Eddy currents; Hysteresis; Magnetic flux; Shafts; Stator cores; Teeth; Topology; Torque;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Society Annual Meeting, 2008. IAS '08. IEEE
Conference_Location :
Edmonton, Alta.
ISSN :
0197-2618
Print_ISBN :
978-1-4244-2278-4
Electronic_ISBN :
0197-2618
Type :
conf
DOI :
10.1109/08IAS.2008.37
Filename :
4658825
Link To Document :
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