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 82 for “"electromagnetic interference (EMI)"”.
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Carbon Hybrid Materials for Electromagnetic Interference (EMI) Shielding and Charge Storage Applications
… applications of polymer nanocomposites namely, EMI (electromagnetic interference) shielding and charge storage. In EMI shielding, our goal was to alleviate the destructive interference of electronic devices caused by their emitted electromagnetic waves which adversely affect device functions as …
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Anticipating system-level electromagnetic interference using numerical methods and measurement techniques
… for solving the accompanying increase of electromagnetic interference (EMI) problems. In this work, strategies combining both numerical modeling and experimental techniques are developed for anticipating system-level EMI at the early stage, and verified in a controlled laboratory …
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Signal and power integrity analysis of bidirectional DC-DC converters for hybrid energy storage systems with EMI/EMC optimization
… with fast dv/dt and di/dt edge rates to achieve electromagnetic interference (EMI) compliance standards. Furthermore, it focuses on comparative analysis and investigation of near-field noise emissions measured from three PCB designs each sharing the same schematic but different layout design …
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The effects of non-uniform illumination on the performance of series connected photovoltaic arrays
… generating effects of Radio Frequency (RF) and Electromagnetic Interference (EMI). Transferring power optically also has the benefit of generating electricity in regions where electrical isolation is required. Using Series Connected Photovoltaic Arrays (SCPA) for voltage conversion has the …
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Mitigating Electromagnetic Interference in Unshielded MRI: Implementation, Experimentation, and Future Directions
… Operating outside an RF-shielded room introduces electromagnetic interference (EMI), degrading further the signal-to-noise ratio (SNR) which is already diminished due to the lower magnetic fields used in portable imaging. Existing methods to reduce EMI perform well in simple noise environments, …
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Optically Controlled Vertical GaN finFET for Power Applications
… gate-driving circuits and are susceptible to electromagnetic interference (EMI). Optically triggered power devices can significantly improve circuit complexity, EMI susceptibility, and system reliability. This thesis presents the first demonstration of an optically controlled vertical GaN …
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Inductance cancellation techniques with application to EMI filters and components
… topologies, such as those designed 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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Pulse Density Modulated Soft Switching Cycloconverter
… down in frequency, as well as where the lower electromagnetic interference (EMI) of soft switching may be beneficial.
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COMMON MODE VOLTAGE ELIMINATION IN THREE-PHASE FOUR-LEG INVERTERS UTILIZING PULSE DENSITY MODULATION
Common mode (CM) electromagnetic interference (EMI) is a phenomenon that negatively affects power electronics to include voltage source inverters. Typically, CM EMI reduction is achieved through passive measures such as CM chokes and passive filters. This thesis research explores removing the need …
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Finite Element Analysis of EMI in a Multi-Conductor Connector
… on each other with a view to design for electromagnetic compatibility of connectors. When there is an electrically excited conductor in a medium, it acts as an antenna at high frequencies and radiates electromagnetic power. If there are any conductors in its vicinity they too act as …
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EMI failure analysis techniques and noise prediction for trace crossing split planes
… the source, coupling path, and antenna in an electromagnetic interference (EMI) problem. No single method is the best option in all cases. A good electromagnetic compatibility (EMC) engineer should understand and have experience with a wide range of failure analysis methods and thus, be able …
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Control for an optically powered firing set using miniature photovoltaic arrays
… such as immunity to noise problems from Electromagnetic Interference (EMI) and Electromagnetic Radiation (EMR). Also, optically powered devices provide additional safety to prevent unintended usage and are small in volume in comparison to their electrical equivalent. These advancements …
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Design Of A Material Test Kit For Use From 1.6 Ghz To 26.5 Ghz And Its Use In Evaluation Of Dielectric Properties Of Foam Core Materials Used In Sandwich Composites
… engineering and electronics such as insulators, electromagnetic interference (EMI) shielding materials etc. So, the research in the measurement of electromagnetic properties i.e. dielectric properties of these materials has been conducted. In this presentation, the dielectric properties of …
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Thermal design and analysis of the SKA SA MeerKAT Digitiser
… radio signal from being contaminated by the electromagnetic interference (EMI)/radio frequency interference (RFI) noise created by the Digitiser electronics. However, if a Digitiser could be placed near the antenna feed, this would decrease the length of the signal path between the receiver …
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A spread-spectrum clock generator using phase interpolation for EMI reduction
… the digital blocks of the DAC in order to reduce electromagnetic interference (EMI) spurs at the analog output signal of the DAC. Leveraging on a phase control architecture rather than a traditional PLL, the SSCG system is shown to reduce the spectral height a divided down clock spur up to 19.6dB. …
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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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A Novel Auxiliary Resonant Snubber Inverter Using Wide Bandgap Devices
… decent power conversion efficiency and low electromagnetic interference (EMI) with higher switching frequency, soft-switching needs to be implemented. A novel auxiliary resonant snubber is introduced. The design and operation are carried out, in which this snubber circuitry enables main …
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An optic fiber sensor for partial discharge acoustic detection
… electrical nonconductivity, and immunity to electromagnetic interference (EMI). A fiber optic sensor based on a Fabry-Perot interferometry is constructed by a simple micromachining process compatible with MEMS (Microelectromechanical system) technology. The sensor is used in a transformer to …
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High-Performance High-Power Inductor Design for High-Frequency Applications
… achieve high Q, air-core inductors can induce electromagnetic interference (EMI) and eddy current loss in surrounding components, thus limiting system miniaturization. With the recent advancements in high-performance, high-frequency magnetic materials, there is interest in leveraging these …
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Application of Optimization Techniques to the Design of a Boost Power Factor Correction Converter
… factor correction (PFC) converter with an input electromagnetic interference (EMI) filter at the component level. The analysis is performed based on the particular minimum cost design study of a 1.15 kW unit satisfying a set of specifications. A traditional design methodology is initially …
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