A new structure of the transformer and its winding layout are proposed to reduce the common-mode (CM) noise generated from the planar transformer (PT). In the proposed converter, two half-bridge LLC resonant converters are connected in parallel on the primary side, and the secondary side of them is connected in series. The proposed converter can be utilized for the medium-to-high power applications due to the full-bridge structure of the primary side. For each transformer, one of the terminals is connected to the static point, which has zero dv/dt characteristic. Thus, the primary-side layer can have the same dv/dt characteristics with the secondary-side layer. By adjacently locating the primary and secondary layers, which have the same dv/dt characteristic, the CM current and noise generated from PT can be significantly reduced. Therefore, the proposed converter can achieve a high power density by reducing the size of the electromagnetic interference filter.

中文翻译：

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具有静态点连接变压器的低共模噪声 LLC 谐振转换器

提出了一种新的变压器结构及其绕组布局，以减少平面变压器 (PT) 产生的共模 (CM) 噪声。在建议的转换器中，两个半桥有限责任公司谐振变换器初级并联，次级串联。由于初级侧的全桥结构，所提出的转换器可用于中到高功率应用。对于每个变压器，其中一个端子连接到静态点，静态点为零影音/dt特征。因此，初级侧层可以具有相同的影音/dt具有二次侧层的特性。通过相邻定位主次层，它们具有相同的影音/dt特性，可以显着降低 PT 产生的 CM 电流和噪声。因此，所提出的转换器可以通过减小电磁干扰滤波器的尺寸来实现高功率密度。