A novel winding layout strategy for planar transformer applicable to high frequency high power DC-DC converters
A novel winding layout strategy for planar transformer applicable to high frequency high power DC-DC converters
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一种适用于高频大功率DC-DC变换器的新型平面变压器绕组布局策略
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
G. Moschopoulos
中科院分区：
文献类型：
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作者：
M. Pahlevaninezhad;P. Das;J. Drobnik;P. Jain;A. Bakhshai;G. Moschopoulos
大功率隔离全桥DC/DC转换器广泛应用于电动汽车和混合动力汽车的蓄电池充电。这种DC/DC转换器使用平面磁性元件，以最大限度地减小其尺寸和重量，并增强其承受机械振动的能力。DC/DC转换器中典型的平面变压器(PT)具有高的匝间和层间电容，这会导致它们吸收高的峰值电流，增加次级整流设备的电压过冲，并增加泄漏电流，从而导致EMI问题。PT的这些关键问题限制了电动汽车用DC/DC转换器开关频率的提高，阻碍了此类DC/DC转换器的设计人员降低转换器的整体尺寸和重量。为了减小平面变压器的杂散电容，提出了一种新的绕组布局策略。文中给出的分析和实验结果验证了该绕组策略的有效性。
High power isolated full bridge DC/DC converters are used widely in electric vehicles (EVs) and hybrid electric vehicles for battery charging purpose. Such DC/DC converters use planar magnetic components to minimize their size and weight and to increase their ability to withstand mechanical vibrations. Typical planar transformers (PT) in DC/DC converters have high inter-turn and inter-layer capacitances that cause them to draw high peak currents, increase voltage overshoot across secondary rectifying devices, and increase leakage current, which causes EMI problems. These key problems of PT restricts increase of switching frequency of DC/DC converters used in EVs, which in prevents designers of such DC/DC converters from decreasing overall size and weight of the converters. This paper proposes a novel winding layout strategy to mitigate the stray capacitance of planar transformers. The effectiveness of the proposed winding strategy is validated by analytical and experimental results that are presented in the paper.