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Study of EMI Filter for Switch Mode Power Supply

Author: CaoLiPing
Tutor: ZhuManZuo
School: Xi'an University of Electronic Science and Technology
Course: Environmental Engineering
Keywords: Switching Power Supply EMI filter Three-terminal capacitor Insertion Loss
CLC: TN713
Type: Master's thesis
Year: 2010
Downloads: 489
Quote: 1
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Abstract


The switching power supply provides a steady supply of electricity for the power electronic devices work properly . However itself is a source of EMI , EMI filter need to install its conduction interference suppression . Three-terminal capacitor to suppress switching power high-frequency interference with good performance in the general typical EMI filter structure based on the use of three-terminal capacitor to improve the high frequency performance of the filter . First expounded the basic principle of the EMI filter circuit structure , design principles and technical parameters of the filter . A three-terminal capacitor EMI filter design based on this model of low-frequency and high-frequency filter model . Specific analysis of the y C three-terminal capacitor capacitance and equivalent series inductance ESL filter insertion loss , and simulation results of insertion loss simulation using PSpice simulation software . High frequency filter characteristics greatly influenced by the characteristics of the components parasitic This paper discusses several typical methods to eliminate parasitic characteristics , be applied to the elimination of T- filter parasitics . Final statement of filter use and installation considerations .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Filtering techniques,the filter
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