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 13 of 13 for “"Electro-magnetic Interference (EMI)"”.
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Automated synthesis and NULL cycle reduction optimization for asynchronous NULL convention circuits using industry-standard CAD tools
… as reduced timing effort, power dissipation, and electro-magnetic interference (EMI), increased robustness, and better suitability for System-on-Chip (SoC) design, the lack of an automated design flow continues to prevent its widespread usage in the semiconductor industry. A novel circuit …
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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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Thermal and EMI Modeling and Analysis of a Boost PFC Circuit Designed Using a Genetic-based Optimization Algorithm
… (PFC) circuit is a common circuit in power electronics. Through years of experience, many designers have optimized the design of these circuits for particular applications. In this study, a new design procedure is presented that guarantees optimal results for any application. The algorithm …
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Generalized Terminal Modeling of Electro-Magnetic Interference
Terminal models have been used for various power electronic applications. In this work a two- and three-terminal black box model is proposed for electro-magnetic interference (EMI) characterization. The modeling procedure starts with a time-variant system at a particular operating condition, which …
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Switching frequency reduction in pulse-width modulated multilever converters and systems
… provide lower cost, higher performance, lower Electro-Magnetic Interference (EMI), and higher efficiency than the traditional PWM converters. However, switching losses become a serious issue in high power applications. In order to improve the efficiency and reliability of the system, and reduce …
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Development of Novel Optical Fiber Interferometric Sensors with High Sensitivity for Acoustic Emission Detection
… of real-time on-line detection of acoustic emissions in power transformers, this dissertation presents the comprehensive research work on the theory, modeling, design, instrumentation, noise analysis, and performance evaluation of a diaphragm-based optical fiber acoustic (DOFIA) sensor …
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Spectrum shaping and its application: spread-spectrum clock generator and circuits for ultra wide band
Electromagnetic spectrum can be identified as a resource for the designer, as well as for the manufacturer, from two complementary points of view: first, because it is a good in great demand by many different kind of applications; second, because despite its scarce availability, it may be …
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Device and Circuit Level EMI Induced Vulnerability: Modeling and Experiments
Electro-magnetic interference (EMI) commonly exists in electronic equipment containing semiconductor-based integrated circuits (ICs). Metal-oxide-semiconductor field-effect-transistors (MOSFETs) in the ICs may be disrupted under EMI conditions due to transient voltage-current surges, and their …
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Power Converter and Control Design for High-Efficiency Electrolyte-Free Microinverters
… and improve the long-term reliability, electrolytic capacitors must be avoided in microinverters because they have been identified as an unreliable component. One solution to avoid electrolytic capacitors in microinverters is using a two-stage architecture, where the high voltage direct …
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EMI Terminal Behavioral Modeling of SiC-based Power Converters
… and power density in 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 …
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Control Strategies for Minimizing the DC-Link Capacitance in Power Electronics Converters for Aircraft Electrical Power Systems
… or 540V) by using transformers and power electronics converters (PECs) to feed DC loads. The DC is further converted into 115V 400Hz AC, and 28V DC using PECs to feed legacy loads. In MEA, the usage of PECs has increased significantly over the last few decades. These PECs have DC-link and …
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Enhanced Gate-Driver Techniques and SiC-based Power-cell Design and Assessment for Medium-Voltage Applications
… wide-bandgap-based (WBG) materials. SiC power semiconductors exhibit superiority in terms of switching speed, higher breakdown electric field, and high working temperature, slowly becoming a global solution in harsh medium-voltage (MV) high-power environments. However, to utilize the SiC MOSFET …
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Modeling and Characterization of Power Electronic Converters with an Integrated Transmission-Line Filter
… — is modeled to accurately predict the EMI characteristics of the system. A method was derived to model the filter's performance in the time-domain while accurately depicting the highly frequency dependant transmission-line properties. A system model of a power factor correction (PFC) …