多通道交错并联反激变换器磁集成技术研究

采用谐波分解方法揭示了电压调整模块电感耦合带来通道电流谐波消除的内在机理。在反激变换器中，交流线圈损耗可由变压器分量损耗和电感器分量损耗2部分组成。在中小功率场合，变压器的电流纹波较大，电感器分量带来严重的气隙扩散磁通效应往往成为线圈涡流损耗的主要因素，因此，结合多通道耦合电感技术和反激变压器的线圈损耗特点，提出多通道交错并联反激变换器磁集成技术，以减小电流纹波，改善线圈的电感器分量损耗和磁芯损耗，并通过理论分析和实验加以证明。

Research on Magnetic Integration of Multi-phase Interleaving Flyback Converter

The harmonic decomposition method was introduced to illustrate the current reduction mechanism of coupled inductor in VRM (voltage regulator module). AC winding loss of flyback transformer was decomposed into transformer component loss and inductor component loss. It was just the inductor component ripple that took the main role for winding loss due to severe air gap fringing effect, especially in low and middle power supply. Therefore, based on multiphase coupled inductor technique and winding loss features, magnetic integration of multiphase interleaving flyback converter was proposed to reduce current ripple and improve the inductor component winding loss and core loss. Theoretical analysis and experiment were carried out for verification.