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Optimized design of LLC resonant converters incorporating planar magnetics

机译：结合平面磁性的LLC谐振转换器的优化设计

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The LLC resonant converter is widely applied as front-end dc-dc conversion for distributed power system and intermediate conversion for renewable energy power generation systems. A continuous miniaturization of LLC resonant converter incorporating planar magnetics is leading to higher performance, higher efficiency and decreasing costs. This paper outlines an improved design methodology for LLC resonant converters based on judicious choice of the circuit components including the resonant inductor, the transformer magnetizing inductor and the resonant capacitor as well as the dead time. Planar magnetics are playing a significant role in the low profile DC/DC converter applications. With the planar transformer employed, the parameters can be controlled precisely which is of great importance to the operating performance of the converter. Several structures of the planar transformer applied in LLC resonant converter are investigated. Finally, the comparison of the proposed structures basis on the ac resistance and the winding losses are presented.
机译：LLC谐振转换器广泛用作分布式电源系统的前端DC-DC转换以及可再生能源发电系统的中间转换。结合了平面磁性的LLC谐振转换器的不断小型化导致更高的性能，更高的效率和更低的成本。本文概述了LLC谐振转换器的一种改进的设计方法，该方法基于对包括谐振电感器，变压器励磁电感器和谐振电容器的电路组件以及空载时间的明智选择。平面磁性在薄型DC / DC转换器应用中起着重要作用。使用平面变压器，可以精确地控制参数，这对于转换器的工作性能非常重要。研究了应用于LLC谐振变换器的平面变压器的几种结构。最后，提出了基于交流电阻和绕组损耗的建议结构的比较。

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