Abstract：Compared with the traditional three-phase planar laminated core transformer, 3D wound core transformer has the advantages of symmetrical magnetic circuit, low vibration and noise, resulting in the potential in the power electronic application. In order to improve the overall power density of the converter, the working magnetic density amplitude of the transformer core should be increased as much as possible, so it is urgent to accurately evaluate the working characteristics of the 3D wound core transformer around the saturated boundary. This paper mainly studied the modeling of 3D wound core transformer considering core nonlinearity. Firstly, the three-phase magnetic circuit model was established based on the Jiles-Atherton (J-A) hysteresis model; Secondly, the two-dimensional equivalent finite element method(FEM) model of 3D wound core transformer was established. Compared with the three-dimensional FEM model, the simulation time can be shortened by 96.66% and memory occupation space can be reduced by 92.93%. On this basis, the working characteristics of 3D wound core transformer under non-sinusoidal excitation was studied. Based on a 80kV•A 3D wound core transformer prototype, the experiment platform was established to verify the presented model in this paper and analyze the third harmonic amplitude of the magnetic density.
杨北超, 范学鑫, 王瑞田, 张新生, 揭贵生. 考虑铁心非线性的三相立体卷铁心变压器建模及空载特性分析[J]. 电工技术学报, 2022, 37(9): 2263-2274.
Yang Beichao, Fan Xuexin, Wang Ruitian, Zhang Xinsheng, Jie Guisheng. Modeling and No-Load Characteristics Analysis of 3D Wound Core Transformer Considering Core Nonlinearity. Transactions of China Electrotechnical Society, 2022, 37(9): 2263-2274.
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2022, Vol. 37 
