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Diagnosis and Robust Design Optimization of SPMSM Considering Back EMF and Cogging Torque due to Static Eccentricityopen access

Authors
Park, Jin-CheolPark, Soo-HwanKim, Jae-HyunLee, Soo-GyungLee, Geun-HoLim, Myung-Seop
Issue Date
May-2021
Publisher
MDPI
Keywords
back electromotive force; cogging torque; robust design optimization; static eccentricity
Citation
ENERGIES, v.14, no.10, pp.1 - 19
Indexed
SCIE
SCOPUS
Journal Title
ENERGIES
Volume
14
Number
10
Start Page
1
End Page
19
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1196
DOI
10.3390/en14102900
ISSN
1996-1073
Abstract
Static eccentricity (SE) is frequently generated by manufacturing processes. As the nonuniformity of the air-gap length is caused by the SE, the torque ripple and cogging torque increase in the motor. This study analyzes the distorted back electromotive force (EMF) and cogging torque due to SE. Further, a motor design considering SE is performed for stable back EMF and low cogging torque. First, the SE was diagnosed and analyzed using the back EMF and cogging torque measured from the test results of the base model. In addition, the rotor position was calculated using the unbalanced back EMF due to the SE. The calculated rotor position is used when analyzing phenomena due to SE and applied to robust design. Subsequently, robust design optimization was performed to improve the unbalanced back EMF and cogging torque due to SE. Using finite element analysis (FEA) considering SE, the shape of the stator was designed based on the base model. The estimated rotor position from the base model was applied to the optimum model to confirm its robustness from SE's effects. Finally, the base and optimum models were compared through the test results.
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COLLEGE OF ENGINEERING (DEPARTMENT OF AUTOMOTIVE ENGINEERING)
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