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 20 of 20 for “"EMI filters"”.
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Integrated EMI Filters for Switch Mode Power Supplies
… electronics converters are potentially large EMI noise sources to nearby equipment. EMI filters are necessary to ensure electromagnetic compatibility. Conventional discrete EMI filters usually consist of a large number of components, with different shapes, sizes and form factors. The …
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Inductance cancellation techniques with application to EMI filters and components
… for reducing electromagnetic interference (EMI). A design methodology and fabrication process is presented for packaging a capacitor and matched inductance cancellation winding together to create a self-contained integrated filter element.
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Towards High Efficiency and High Power Density Converter: System Level Design, Modulation, and Active EMI Filters
… balancing and electromagnetic interference (EMI). Morever, to shrink the EMI filter size for the power converter, an active EMI filter (AEF) structure is proposed. The proposed AEF provides superior performance than any of the conventional passive EMI filter and the existing AEFs. In this …
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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 …
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Modeling strategy for EMI filter and flyback transformer
… of the circuit introduces issues in conducted emissions. In a flyback converter, the transformer serves as the path for common mode current flowing from the primary side to the secondary side. Different winding technologies have been invented and implemented to reduce the capacitance between …
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Passive Component Weight Reduction for Three Phase Power Converters
… using power electronic devices also introduces EMI issues to the system, which means filters are inevitable in those systems, and they make up a significant portion of the total system size and cost. Thus, designing for high power density for both power converters and passive components, …
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A Compact Three-Phase Multi-stage EMI Filter with Compensated Parasitic-Component Effects
With the advent of wide bandgap (WBG) semiconductor devices, the electromagnetic interference (EMI) emissions are more pronounced due to high slew rates in the form of high dv/dt and high di/dt at higher switching frequencies compared to the traditional silicon technology. To comply with the …
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Control Strategies for Minimizing the DC-Link Capacitance in Power Electronics Converters for Aircraft Electrical Power Systems
… Finally, the Electro-magnetic interference (EMI) filter design for the BSG based DC and AC systems are studied. The EMI filters are designed for different PECs such as two-quadrant DC chopper, diode rectifier, active rectifier, and four-leg inverter in the BSG based DC and AC systems. The …
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Zero Voltage Switching (ZVS) Turn-on Triangular Current Mode (TCM) Control for AC/DC and DC/AC Converters
… in these vehicles. Electromagnetic Interference (EMI) filters take up a more than 80 % of these power converters, the size of these filters can be reduced by pushing the switching frequency higher. High frequency operation (> 300 kHz) leads to a size in reduction of EMI filters though it also …
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Three-phase power conversion using soft-switching PWM techniques
… power converter topologies 2. Design of input EMI filters for three-phase converters 3. Design of microprocessor controllers for three-phase converters. An analysis of existing soft-switching PWM techniques is performed, and two generalized soft-switching PWM converter circuit representations …
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System interactions and design considerations for distributed power systems
… be used in the interaction analysis. Design of EMI filters for a two-stage DPS is comprehensively discussed. A detailed analysis of the effects of input filters on current-mode controlled single-module regulators is given. It is shown that the criteria used to minimize filter interaction for …
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Generalized Terminal Modeling of Electro-Magnetic Interference
… is proposed for electro-magnetic interference (EMI) characterization. The modeling procedure starts with a time-variant system at a particular operating condition, which can be a converter, set of converters, sub-system or collection of components. A unique, linear equivalent circuit is created …
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Behavioral EMI-Models of Switched Power Converters
… behavioral electromagnetic interference (EMI) models have been shown earlier to accurately capture the EMI behavior of switched power converters. These models are compact, linear, and run in frequency domain, enabling faster and more stable simulations compared to the detailed lumped …
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Investigation of the high-frequency effects in Mn-Zn ferrites for EMI filter applications
… high-power electromagnetic interference (EMI) filters. These applications require cost-optimized, high-performance, and high-power-density magnetic components. As the manufacturers’ material specifications usually do not provide sufficient information to optimize the design, this thesis …
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Hybrid Core Inductors for High Saturation Capability
… current with relatively small ac ripple, such as EMI filters or converters operating in continuous conduction mode. This thesis investigates two types of inductor designs that can achieve higher saturation capability by combining multiple materials in a single core, enabling these designs to …
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Power Density Optimization of SiC-based DC/AC Converter for High-Speed Electric Machine in More/All-electric Aircraft
… while adhering to the stringent aerospace EMI standard DO-160 and bearing current limitations. Electric aircraft demand unmatched reliability, necessitating strict control over EMI noise and bearing currents. These considerations significantly impact the selection of topology and parameters …
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Integrated Frequency-Selective Conduction Transmission-Line EMI Filter
… attenuator and the DM transmission-line EMI filter. The insertion gain, transfer gain, current distribution, and input impedance of the filter under a nominal design are discussed. In order to apply the transmission-line EMI filter to power electronics systems, the performance of the …
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A Pseudo-Binary Cascaded H-bridge Converter for Solid-State Transformer Applications and Modulation Techniques for the Minimization of the Common-Mode Voltage
… transfer 1kW each. Electromagnetic interference (EMI) also impacts the cost, size, and reliability of three-phase systems because they may require bulky EMI filters to avoid self-pollution and polluting the grid. The common-mode voltage (CMV) is one important factor of EMI emissions. Thus, …
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Generalized Frequency Plane Model of Integrated Electromagnetic Power Passives
… of resonant circuits, transformers, EMI filters and the like into the integrated power electronics modules. These integrated electromagnetic power passives have been realized in terms of distributed structures, utilizing magnetic layers, conductive layers and dielectric layers. …
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Circuits and Modulation Schemes to Achieve High Power-Density in SiC Grid-connected Converters
… common-mode electromagnetic interference (EMI) model is proposed, which predicts the impact of the dc-dc stage and a large battery-rack on the output CM noise. Based on the model, severe deterioration of noise by the dc-dc stage and battery-rack can be predicted. Special attention was paid …