Modeling and Stability Analysis of Voltage Sensing based Differential Mode Active EMI Filters for AC-DC Power Converters

B. Narayanasamy, F. Luo, Yongbin Chu
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引用次数: 8

Abstract

Passive EMI filters occupy significant volume in a power converter. Active EMI Filters (AEF) are a means to reduce the volume of passive filter components. It is essential to identify the boundaries within which the AEF could be designed and the possible volume reduction that is achievable. This work involves the modeling and stability analysis of Feedback Voltage Sense Current Cancellation (VSCC) Active EMI Filters. Type of applications that benefit from using voltage sensing over current sensing for is identified. An example of a non-PFC AC-DC converter is considered. Noise sensing networks comprising high voltage capacitors and high pass filter networks are designed for sensing noise. The overall filter implementation is modeled, and stability analysis is carried out. Suitable compensation networks are designed to make the filter viable. Major bottlenecks that limit the maximum attenuation are identified and general guidelines for the application of Feedback VSCC topology are proposed.
基于电压传感的交直流电源变换器差分型有源EMI滤波器建模及稳定性分析
无源EMI滤波器在功率变换器中占有很大的体积。有源EMI滤波器(AEF)是减少无源滤波器元件体积的一种手段。确定设计AEF的边界以及可能实现的体积减少是至关重要的。本工作涉及反馈式电压感应电流抵消有源EMI滤波器的建模和稳定性分析。确定了使用电压感应优于电流感应的应用类型。本文考虑了一个非pfc AC-DC转换器的例子。噪声检测网络由高压电容器和高通滤波网络组成,用于噪声检测。对整个滤波器的实现进行了建模,并进行了稳定性分析。设计了合适的补偿网络,使滤波器可行。确定了限制最大衰减的主要瓶颈,并提出了反馈VSCC拓扑应用的一般准则。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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