This article proposes a low common-mode (CM) noise full-bridge LLC resonant converter with two balanced resonant tanks. In the proposed converter, each resonant inductor and capacitor is divided into two components with the same value. The CM current flowing through parasitic capacitors of the transformer is reduced due to the balanced resonant tank. Moreover, the CM noise can be significantly reduced by adjacently locating the primary and secondary layers with the same dv/dt characteristic. Therefore, the proposed converter decreases the CM noise generated from the planar transformer (PT) by the balanced resonant tank and proposed layer arrangement of PT and achieves a high power density with a decreased size of the electromagnetic interference filter. The validity of the proposed converter is verified by a 1.5-kW prototype with 400-V input and 270–420-V output.

中文翻译：

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具有平衡谐振回路的低共模噪声全桥 LLC 谐振转换器

本文提出了一种具有两个平衡谐振回路的低共模 (CM) 噪声全桥 LLC 谐振转换器。在建议的转换器中，每个谐振电感器和电容器被分成具有相同值的两个组件。由于平衡谐振回路，流经变压器寄生电容的共模电流降低。此外，通过将具有相同 dv/dt 特性的初级和次级层相邻放置，可以显着降低 CM 噪声。因此，所提出的转换器通过平衡谐振回路和所提出的 PT 层布置降低了平面变压器 (PT) 产生的 CM 噪声，并在减小电磁干扰滤波器尺寸的情况下实现了高功率密度。建议的转换器的有效性由 1 验证。