高频变压器绕组交流电阻和漏感的一维模型

1D models of windings AC resistance and leakage inductance in high-frequency transformer

本文从变压器线圈电磁场分布出发,分析了高频薄型变压器绕组交流电阻和漏感的一维模型。一维模型不能区分不同的绕组导线类型,难以揭示不同导线排列所产生的效果。但是检验结果表明,它仍具有一定的适用性。

From the view of power loss and magnetic energy distribution in high-frequency low profile transformer's winding, 1D models of the copper foil's AC resistor and leakage inductance was deduced and analyzed in the paper. Other windings such as solid wire and Litz wire should be changed to foil using an equivalent principle in order to fit the models. 1D models are based on the hypothesis that the same magnetic intensity on each conductive surface and the magnetic edge effect can be neglected. 1D models are widely used because of simple and convenient. Since the power loss and magnetic energy which are used to acquire the models take account of the DC field intensity only, 1D models can not reflect the effect of different winding strategies and it also can not distinguish different wire type. It was verified that the accuracy could be higher when the winding's equivalent conductivity η σ of the winding is near the copper conductivity σ.