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 24 for “"Magnetic cores"”.
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Low temperature manufacturing of ferrite-epoxy inductor cores by micro-robotic deposition
… that provide the inductive properties, and the magnetic cores used to enhance those properties. Power losses associated with these devices can also be categorized by these two components called copper and iron losses, respectively. Iron losses, or core losses, are highly dependent on the …
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Multiphysics Design and Modeling for Advanced Packaging and Heterogeneous Integration of Power Delivery
… is introduced, featuring two coils separated by magnetic cores and an air gap. This configuration enhances saturation current capacity and overall performance, mitigating the common low-saturation current limitation in embedded inductors. For multiphysics modeling, an augmented computational …
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Modeling and Design of a Three-dimensional Inductor with Magnetic Core
… inductors with new geometries housing magnetic cores that show an enhanced inductance compared to the air core coil. In this thesis, we discuss the design of a three-dimensional spiral inductor with a Co-Fe nanoparticle core that will be fabricated as per the process rules set by VT MT …
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Computer Aided Design and Fabrication of Magnetic Composite Multilayer Inductors
… film inductors using an artificially modulated magnetic composite structure. It was found that selectively introducing regions of low permeability material increased both the inductance and the current carrying capacity compared to thick film inductors made with single material magnetic cores. …
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Customisable Magnetic Components Using Nanocrystalline Flake Ribbon
… growing demand for customising high-performance magnetic components with reduced losses, compact dimensions, lighter weight, and cost-effectiveness. Traditional methods for core customisation are cumbersome, time-consuming, and costly when producing small series of magnetic cores. Recently …
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Magnetothermal Modulation of Nerve Growth
Magnetic nanoparticles (MNPs) provide several mechanisms for wireless neuromodulation. MNPs under applied AC magnetic fields (AMFs) exhibit hysteresis loss, which can activate heat-sensitive ion channels such as TRPV1. This magnetothermal modulation requires AMFs with peak field strengths of up to …
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Formulation, development, and characterization of magnetic pastes and epoxies for thick film inductors
… and transformers constitute two important magnetic components In RF and power hybrids electronic circuitry. Thick film inductors have been subject of extensive research in recent years because they significantly reduce the weight and size, and increase the frequency of operation of …
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Design of High-density Transformers for High-frequency High-power Converters
… power converter design is to have high-density magnetic components which are usually the most bulky parts in a converter. Increasing the switching frequency to shrink the passive component size is the biggest contribution towards increasing power density. However, two factors, losses and …
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Reduced-order modeling of power electronics components and systems
… At the component level, dynamic high-fidelity magnetic equivalent circuits are introduced for laminated and solid magnetic cores. Automated linear and nonlinear order-reduction techniques are introduced for linear magnetic systems, saturated systems, systems with relative motion, and …
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Understanding The Physics Of Magnetic Nanoparticles And Their Applications In The Biomedical Field
<p>The study of magnetic nanoparticles is of great interest because of their potential uses in magnetic-recording, medical diagnostic and therapeutic applications. Additionally, they also offer an opportunity to understand the physics underlying the complex behavior exhibited by these materials. …
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Characterizing and modeling methods for power converters
… transistor (HEMT), and the magnetic core in an inductor.</p><p>For the characterization of switching components, a set of test fixtures are designed to characterize the equivalent circuit of Si MOSFETs and GaN HEMTs. The frequency-dependent behaviors of Si MOSFETs are …
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Development of sodium silicate adhesives for electrical steel bonding
… methods for joining electrical steels used in magnetic cores of numerous industrial applications. As insulators with very high melting temperatures, the adhesives offer the possibility of increasing the efficiency of these machines. The aim of this project was to characterize sodium silicates …
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Compact Isolated High Frequency DC/DC Converters Using Self-Driven Synchronous Rectification
… the converter. Also, this thesis proposes a new magnetic integration method to eliminate the need for the two additional gate driver magnetic cores by allowing three discrete power signals to pass through one single magnetic structure. The magnetic integration reduces the overall converter …
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Computer-Aided Formulation of Magnetic Pastes for Magnetic Components in Power Electronics
Magnetic components are necessary for switch-mode power electronics converters, but they are often the bulkiest and heaviest in the system. Novel magnetic designs with intricate structures lead to the size reduction of power electronics converters but pose challenges to the fabrication process and …
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Additive Manufacturing of Electrical Machines and Electronic Devices
… transistors) electronic components, as well as magnetic cores and power transfer devices. However, each new demonstration of 3D-printed functional devices has typically required increasingly specialized and expensive manufacturing hardware. This work opposes that trend by developing a technology …
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Maximizing Flexibility and Efficacy of Undersea Wireless Power Transfer Systems
… air. Finally, the study investigates the use of magnetic cores in WPT systems for EM shielding and field-shaping characteristics. A design methodology is introduced to rank material properties based on the desired system performance characteristics. Suggested materials are then chosen according …
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Towards Multifunctional Materials based on Coordination Complexes of Sulfur-Containing Diarylazo and Cucurbit[6]uril Ligands
… by cyclic voltammetry, EPR spectroscopy and magnetic susceptibility studies. EPR measurements of 4c at 80 K and RT revealed noticeable differences in profiles suggesting the occurrence of structural and/or electronic changes with temperature. DC magnetic studies on 4c and 5a reveal the …
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Duality derived topological model of single phase four limb transformers for GIC and DC bias studies
Geomagnetic disturbances brought about by solar activity cause geo-electric fields in the Earth that drive geomagnetically induced currents through the earthed neutrals of transformers and through power transmission networks. The flow of these currents causes the magnetic cores of transformers to …
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Design of High-Power High-Frequency Coreless Transformer Systems
… that require large, heavy and costly magnetic cores to guide magnetic flux between windings, the coreless power transformer employs extra resonant coils to provide near perfect magnetic coupling between input and output windings. The four-coil implementation of a high-frequency …
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