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Finite Element Analysis of Local Flux Density Variation Considering PWM Current Harmonics

Title
Finite Element Analysis of Local Flux Density Variation Considering PWM Current Harmonics
Author
홍정표
Keywords
Electric motor; finite-element analysis (FEA); magnetic cores; magnetic flux density
Issue Date
2017-06
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON MAGNETICS, v. 54, no. 3, Article no. 8201804
Abstract
Large amounts of harmonics are contained in the current as the motor is driven by pulse width modulation (PWM). Significant amounts of computing time are required to compute local flux density variation considering such current harmonics. Since the amplitudes of higher harmonics are significantly smaller than that of fundamental harmonic, flux density variations due to the higher harmonics are small, and the relationship between the field strength and flux density can be assumed to be linear. When the operating point of each element is known, flux density variations for the higher harmonics can be analyzed by linear finite-element analysis (FEA). This paper suggests a method to calculate flux density variations in the iron core while taking into considering PWM current harmonics. First, the operating point solution is obtained by nonlinear FEA, second each element is linearized. Then, the flux density for the PWM current is obtained through linear FEA. Finally, the obtained results are presented and compared with nonlinear FEA results for verification.
URI
https://ieeexplore.ieee.org/document/8095004https://repository.hanyang.ac.kr/handle/20.500.11754/114411
ISSN
0018-9464; 1941-0069
DOI
10.1109/TMAG.2017.2762326
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > AUTOMOTIVE ENGINEERING(미래자동차공학과) > Articles
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