平面变压器绕组结构设计

Jie Zhang, Wandong Zhou
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引用次数: 1

摘要

为了减小磁性元件的体积,一般要提高磁性元件的工作频率。然而,随着工作频率的增加,趋肤效应和接近效应会增加绕组损耗。同时,在低压大电流的DC/DC电源模块中,通常采用并联绕组的方法来增加绕组的载流能力。但趋肤效应和接近效应会导致并联绕组电流分布不均匀,产生较高的交流电阻。本文利用蒙皮之间的正交性和邻近效应,得出了交叉换位技术可以降低绕组损耗的结论,并利用对称对消原理推导出了二次并联绕组在匝数比为n:1的情况下电流并联分路的布置方法。最后,通过Maxwell 3D验证了平面变压器次级并联绕组电流均衡方法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structure Design of Planar Transformer Winding
In order to reduce the volume of the magnetic component, the operating frequency of the magnetic component is generally increased. However, as the operating frequency increases, skin and proximity effects will increase the winding losses. At the same time, in the low-voltage and high-current DC/DC power supply module, method of parallel winding usually be used to increase the current carrying capacity of the winding. But the skin and proximity effects will lead to the unevenly distribute of parallel winding current, resulting in a higher AC resistance. In this paper, by using the orthogonality between the skin and the proximity effect, it is concluded that the cross-transposition technique can reduce the winding loss, and the symmetric cancellation principle is used to derive the arrangement of the current parallel division of the secondary parallel winding in the turns ratio of n:1.method. Finally, the effectiveness of the current equalization method of the secondary parallel winding of the planar transformer is verified by Maxwell 3D.
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