Winding method for high-frequency transformer winding and high-frequency transformer

Abstract

The invention discloses a winding method of a high-frequency transformer. The transformer comprises a primary winding and a secondary winding; the numbers of layers wound by the primary winding and the secondary winding are respectively c1 and c2, wherein c1=c2 or |c1-c2|=1; the primary winding and the secondary winding of the high-frequency transformer are delaminatedly and interlacedly wound; the method of delaminative and interlaced winding is as follows: when c1=c2, the primary winding is wound at odd layers and the secondary winding is wound at even layers, or the primary winding is wound at the even layers and the secondary winding is wound at the odd layers; when c1-c2=1, the primary winding is wound at the odd layers and the secondary winding is wound at the even layers; and when c2-c1=1, the primary winding is wound at the even layers and the secondary winding is wound at the odd layers. The embodiment of the invention also discloses a high-frequency transformer. By adopting the embodiment of the invention, the coil loss increased by proximity effect can be decreased, and the energy transfer efficiency of the high-frequency transformer can be improved.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a winding method of a high-frequency transformer winding and a high-frequency transformer. Background technique [0002] With the rapid development of power electronics technology and magnetic technology, higher requirements are put forward for high frequency, high power density and high conversion efficiency of DC / DC converters. The high-frequency transformer is one of the key components in the DC / DC converter, which has a very important impact on the performance and conversion efficiency of the DC / DC converter. [0003] The high-frequency transformer currently used is mainly a two-winding structure. There are two coil winding methods for the traditional two-winding high-frequency transformer: one is the primary side (primary) coil inside, and the secondary side (secondary) coil is outside, which is called primary-secondary form; the other is the primary side (primary) coil. ) coil...

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Problems solved by technology

[0013] It can be seen that as the number of winding layers increases, the AC loss of the coil due to the proximity effect increases exponentially, thereby reducing the transmission efficiency of the transformer

[0014] In the process of realizing the present invention, the inventor found that the traditional high-frequency transformer coil winding method makes the coil loss caused by the proximity effect proportional to the number of coil layers in the multi-layer wound transformer when the coil flows through the high-frequency current. Exponential growth, reducing the energy transfer efficiency of high-frequency transformers

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