A Fixed-Point Frequency Domain Method Based on Magnetic Scalar Potential and Its Application to the DC Biased Problem in the Laminated Core
Zhao Xiaojun1, Jin Zhiming1, Cao Yuezhi1, Lu Junwei2
1. Department of Electrical Engineering North China Electric Power University Baoding 071003 China; 2. Griffith University Griffith School of Engineering Gold Coast 4222 Australia
Abstract：A fixed-point frequency domain algorithm based on the magnetic scalar and current vector potential is presented by using the complex exponential to approximate periodic variables. The DC biased problem in a laminated core is investigated and analyzed by the proposed method, in which the edge element is used to interpolate the current vector potential. The frequency-domain finite element equation is assembled to solve the two-dimensional nonlinear magnetic field taking electromagnetic coupling into account. The fixed-point permeability is introduced to decompose the coefficient matrix and decouples harmonic solutions, which reduce the memory requirements and computational time significantly. A laminated core model is employed to carry out the DC biasing experiment. The calculated results are compared with the experimental ones to verify the validity of the proposed method in computation and analysis of DC biased problems.
赵小军, 晋志明, 曹越芝, 鲁君伟. 基于磁标量位的定点频域算法及其在叠片铁心偏磁问题中的应用[J]. 电工技术学报, 2019, 34(17): 3590-3598.
Zhao Xiaojun, Jin Zhiming, Cao Yuezhi, Lu Junwei. A Fixed-Point Frequency Domain Method Based on Magnetic Scalar Potential and Its Application to the DC Biased Problem in the Laminated Core. Transactions of China Electrotechnical Society, 2019, 34(17): 3590-3598.
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2019, Vol. 34 
