高频平面变压器绕组损耗新型计算方法

Improved Analytical Calculation of Winding Loss in High Frequency Planar Transformer

本文对高频平面绕组损耗的产生机理及电磁场分布进行理论分析,基于Maxwell电磁场微分方程,推导计算平面绕组损耗一维模型,并分析一维模型计算精度低的主要原因。在传统一维模型基础上考虑矩形导体边缘效应,通过对导体二维磁场正交分解的方法,建立基于二维模型的平面绕组损耗的理论计算公式。根据导体内部电磁场分布,利用二维模型的边界值修正模型得到矩形导体高频损耗的二维数学模型。采用有限元仿真验证二维模型计算结果的准确性及精度,为高频平面变压器设计以及绕组损耗分析提供一种有效的计算方法。

Based on the mechanism and electromagnetic theory of high frequency AC winding losses,this paper analyzes the eddy effects in planar magnetic component,and proposes two-dimensional model based on the traditional one-dimensional model,which takes the edge effect into consideration. The model is further improved by determining the two-dimensional boundary values using a modified approach. The Finite Element Analysis (FEA) suggest the proposed model a more effective and efficiency way to calculate the windings losses in planar magnetic component,which provide an effective calculation method for the optimization design and winding loss analysis of high frequency planar magnetic component in high frequency conditions.