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用于降低隔离式功率变换器共模噪声的混合无源抵消方法

Hybrid Passive Cancelation Method for Reducing Common-Mode Noise in Isolated Power Converters

语言:

中文摘要

屏蔽技术是降低隔离式功率变换器共模(CM)电磁干扰的有效手段。然而,屏蔽层与相邻绕组间的寄生电容会形成CM噪声电流路径。本文提出一种混合无源抵消方法,通过调节屏蔽层与相邻绕组的平均电势(AEP),有效抑制CM噪声电流,从而提升变换器的电磁兼容性。

English Abstract

The shielding technique is an effective method for reducing the common-mode (CM) electromagnetic interference in an isolated power converter. However, the interwinding capacitance between the shielding layer and its adjacent winding provides the path for CM noise current. This CM noise current can be suppressed by making the averaged electric potential (AEP) of the shielding layer and its adjacent...
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SunView 深度解读

该技术对阳光电源的组串式光伏逆变器及PowerTitan/PowerStack储能变流器(PCS)具有重要参考价值。随着高频化和高功率密度趋势,变压器寄生参数引起的EMI问题日益突出。该混合无源抵消方法无需增加复杂有源电路,即可优化磁性元件设计,降低系统共模噪声,有助于提升产品在严苛电磁环境下的可靠性,并简化EMI滤波器设计,降低系统成本与体积,对提升iSolarCloud智能运维平台下设备的运行稳定性具有积极意义。