Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Conducted EMI"”.
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Conducted EMI Noise Prediction and Filter Design Optimization
… is the stringent electromagnetic interference (EMI) regulation worldwide. For the CRM PFC converter, there are several challenges on meeting the EMI standards. First, for the CRM PFC converter, the switching frequency is variable during the half line cycle and has very wide range dependent on …
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Modular Approach for Characterizing and Modeling Conducted EMI Emissions in Power Converters
… power electronics, electromagnetic interference (EMI) and electromagnetic compatibility (EMC) issues have become more and more important for both power converter designers and customers. This dissertation studies EMI noise emission characterization and modeling in power converters. A …
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Modeling and Characterization of a PFC Converter in the Medium and High Frequency Ranges for Predicting the Conducted EMI
This thesis presents the conducted electro-magnetic interference (EMI) prediction results for a continuous conduction mode (CCM) power factor correction (PFC) converter as well as the theoretical analysis for the noise generation and propagation mechanisms. In this thesis, multiple modeling and …
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Electrical, Thermal, and EMI Designs of High-Density, Low-Profile Power Supplies
… supplies, including the electrical, thermal, and EMI aspects. Emphasis is placed on forward and flyback converters. The efficiency improvements of employing synchronous rectification are theoretically derived and experimentally verified in forward and flyback converters. The performances of …
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High-Frequency Design Consideration and EMI Mitigation in SiC-based Multilevel Converters
… on devices, excellent output quality, reduced semiconductor losses, lower common mode voltage among other advantages. However, they may suffer from the large number of switching devices and capacitors, as well as the need to regulate capacitor voltages. SiC MOSFETs can achieve higher switching …
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Modeling and Mitigation of EMI from Near-Field Coupling Effects in Front-End Power Supplies
… commercialization of wide-bandgap (WBG) power semiconductors. The improved performance of WBG devices over traditional silicon devices has enabled significant increases in switching frequency and power density without compromising power efficiency. However, some challenges remain which …
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Modellistica e progettazione di convertitori elettronici di potenza DC-DC
… required, for both circuit topologies and power semiconductors. In this context is presented an extensive experimental analysis of a two-phase Interleaved PFC Boost converter. It aims to highlight the most important features of two-phase interleaved PFC converter operation, in terms of both …
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Ac-dc Bus-interface Bi-directional Converters in Renewable Energy Systems
… the total leakage current and the common-mode conducted EMI noises by more than 90%. The dc-side low-frequency CM voltage ripple generated by the unbalanced ac voltages can be eliminated as well. The proposed solution features a high reliability and fits three types of the prevalent low-voltage …
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EMI Terminal Behavioral Modeling of SiC-based Power Converters
… However, electro-magnetic interference (EMI) becomes a more severe problem as a result. In this thesis, the switching frequency effect on conducted EMI noise is assessed. As EMI noise increases, the EMI filter plays a more important role in a power converter. As a result, an effective EMI …
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Characterization and Cancellation of High-Frequency Parasitics for EMI Filters and Noise Separators in Power Electronics Applications
… of high frequency parasitic parameters in EMI filters. One chapter addresses the interaction between the power interconnects and the parasitic parameters in EMI filters. The last chapter addresses the characterization, evaluation and design of noise separators. Both theoretical and …