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Core Loss Calculation for Soft Magnetic Composite Electrical Machines

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5 Author(s)
Youguang Guo ; Fac. of Eng. & Inf. Technol., Univ. of Technol., Sydney, NSW, Australia ; Jianguo Zhu ; Haiyan Lu ; Zhiwei Lin
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Soft magnetic composite (SMC) materials are especially suitable for developing electrical machines with complex structure and three-dimensional (3-D) magnetic flux path. In these SMC machines, the magnetic field is in general 3-D and rotational, so the mechanism and calculation of core loss may be quite different from that in traditional electrical machines with laminated steels in which the magnetic field is restrained. This paper investigates the calculation of core loss in a permanent magnet claw pole motor with SMC stator core. First, core loss models are developed based on the experimental data on SMC samples by using a 3-D magnetic property tester. Then, 3-D magnetic time-stepping field finite element analysis (FEA) is conducted to find the flux density locus in each element when the rotor rotates. The core loss is computed based on the magnetic field FEA results by using the developed core loss models. The calculations agree well with the experimental measurements on the SMC motor prototype.

Published in:

Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )

Date of Publication:

Nov. 2012

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