Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/27899
Title: ANALYSIS AND MITIGATION OF CONDUCTED EMI IN SWITCHED-MODE POWER SUPPLIES
Authors: KRISHNA MAINALI
Keywords: switched-mode power supplies, electromagnetic interference, common mode noise, differential mode noise, EMI filter
Issue Date: 24-Jan-2011
Source: KRISHNA MAINALI (2011-01-24). ANALYSIS AND MITIGATION OF CONDUCTED EMI IN SWITCHED-MODE POWER SUPPLIES. ScholarBank@NUS Repository.
Abstract: The main focus of this research is to investigate and propose solutions to reduce the conducted EMI noise generated by Switched-mode power supplies (SMPS). A boost power factor correction (PFC) converter has been used for investigation. The first part focuses on analytical models to predict the conducted EMI noise generated. It is verified that the proposed simple models can reasonably predict the noise generated by the converter. A simple metric to characterize and compare EMI spectra of SMPS is also proposed and its use illustrated. The second part focuses on conducted EMI mitigation techniques. Firstly, along with a discussion of design issues, a complete passive filter design methodology, lacking in literature, has been presented. Then, as potential smaller alternatives, active CM (common-mode) noise filters and also hybrid EMI filters have been proposed and investigated. Stability, compensation design and attenuation characteristics have all been explored. The theoretical analyses of the filtering approaches have been substantiated by comprehensive experimental results.
URI: http://scholarbank.nus.edu.sg/handle/10635/27899
Appears in Collections:Ph.D Theses (Open)

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