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首页> 外文期刊>Journal of the Magnetics Society of Japan >Low permeability composite magnetic core transformer with high coupling coefficient and its application to PFM controlled quasi-resonant mode flyback-type DC-DC converter
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Low permeability composite magnetic core transformer with high coupling coefficient and its application to PFM controlled quasi-resonant mode flyback-type DC-DC converter

机译：高耦合系数低磁导率复合磁芯变压器及其在PFM控制准谐振模式反激式DC-DC变换器中的应用

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摘要

??We describe a low permeability composite magnetic core transformer with a high coupling coefficient and its application to a PFM controlled quasi-resonant mode flyback-type DC-DC converter. To increase the coupling coefficient between primary and secondary windings embedded in a carbonyl-iron powder/epoxy composite magnetic core with a relative permeability of 6, three types of winding layouts were investigated by using a 2D-FEA numerical simulation and the characteristics were confirmed experimentally. The primary and secondary windings that were laid out adjacent to each other were the best choice as it had the highest coupling coefficient at over 0.99. By applying the composite magnetic core transformer with this coupling coefficient to a 48 V input/12 V output PFM controlled quasi-resonant mode flyback-type DC-DC converter, the maximum efficiency was 92.5% at an output power of around 28 W, and an efficiency of 90.0% was obtained at an output power of 60 W.
机译：我们描述了一种具有高耦合系数的低磁导率复合磁芯变压器，并将其应用于PFM控制的准谐振模式反激式DC-DC转换器。为了提高埋入在相对磁导率为6的羰基铁粉/环氧树脂复合磁芯中的初级和次级绕组之间的耦合系数，使用2D-FEA数值模拟研究了三种类型的绕组布局，并通过实验确定了特性。彼此相邻布置的初级和次级绕组是最佳选择，因为它的耦合系数最高，超过0.99。通过将具有该耦合系数的复合磁芯变压器应用于48 V输入/ 12 V输出PFM控制的准谐振模式反激式DC-DC转换器，在约28 W的输出功率下，最大效率为92.5％，并且在60 W的输出功率下可获得90.0％的效率。

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