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.
Results
Showing 1 to 20 of 75 for “"Magnetic material"”.
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Magnetic Material Effects On Rf Circuits
This thesis discusses the interaction of magnetic materials and high frequency signals inside of microstrip transmission line circuits. This work is based on microstrip circuit designs that use magnetic materials for either the ground plane and/or as an insert inside the microstrip substrate. The …
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Developing Magnetic Tweezers for Magnetic Material Manipulation
… of manipulating very small structures and materials. Among current available methods, the magnetic tweezers show high efficiency and cost effectiveness in generating strong and direction adjustable interactions with magnetic materials. Since our research group has extensive experience in …
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Selective Laser Melting of Finemet Soft Magnetic Material
Soft magnetic materials have been widely used in electric motors, routers, and detectors. Tremendous studies have been conducted to report microstructural features corresponding to magnetic performance. The laser-based powder bed fusion (L-PBF) additive manufacturing technique was implemented to …
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Magnetic properties measurement of new magnetic material : SOMALOY 700 (5P)
… and more comfortable way. Presently, electromagnetic technology is improving day by day and most of the current electrical machines require the magnetic cores to operate at higher frequency to meet the demand of high–speed performance in catching up the aggressive technological evolution. On …
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Low-temperature magneto-transport study of topological insulator-magnetic material heterostructures
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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High Frequency Inverter Power Stage Design Considerations for Non-Magnetic Materials Induction Cooking
… cookers require the cookware to be made of magnetic materials such as iron and stainless steel. This is why a lot of cookware is labeled "Induction Ready" on the bottom. The limited choice of "Induction Ready" cookware causes inconvenience to customers and limits the growing popularity of …
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Constant-Flux Inductor with Enclosed-Winding Geometry for Improved Energy Density
… have been searching for ways to improve the magnetic energy density and reduce the package size of magnetic parts. The "constant-flux" concept discussed herein is leveraged to achieve high magnetic-energy density by distributing the magnetic flux uniformly, leading to inductor geometries with …
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Accelerating induction machine finite-element simulation with parallel processing
Finite element analysis used for detailed electromagnetic analysis and design of electric machines is computationally intensive. A means of accelerating two-dimensional transient finite element analysis, required for induction machine modeling, is explored using graphical processing units (GPUs) …
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Explaining a Low-Temperature Magnetic Order in Annealed van der Waals Semiconductor CrSBr
… semiconductor CrSBr stands out as a promising 2D magnetic material due to its high ferromagnetic ordering temperature (135 K), near-infrared direct bandgap (1.5 eV), and stability in air. In this thesis we report on the detection of a low-temperature magnetic order in annealed CrSBr bulk single …
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Thin film magnetics for integrated magnetic nano-structures
… seen a surge in demand for highly miniaturised magnetic components which has been enabled by use of power circuitry high switching frequencies which require energy storage on a smaller scale. The optimal scale of this integration will be achieved with the complete integration of the power supply …
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Integration of Filter Elements in Electric Drives
… Integration can consist of utilizing existing magnetic material for an input inductor, or using the rotor inertia to displace electrical filtering. Though integration, mass, cost, or both can be reduced. This could be particularly important for vehicular or residential electric machine and …
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A computer-aided graphic design tool for minimum weight inductors in switching converters
… converter design into view. Practical core and magnetic material data from manufacturer's catalogs can be specified and the design optimized for the minimal weight.
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Enabling HF power conversion : magnetic components and a wide voltage range converter
… dominant frequency-dependent loss mechanisms: magnetic material core loss and switching loss. Appropriate metrics are derived to evaluate magnetic materials in core loss limited components. A survey of material core loss shows the potential for significant performance improvement in the HF …
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Piezoelectric-based Multi-Scale Multi-Environment Energy Harvesting
… the energy harvester, and the properties of the materials employed in energy conversion. This dissertation explores developments in both areas. In the first area, the role of nano-, micro-, and bulk structure of the energy conversion materials were investigated. In the second area, piezoelectric …
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Development of a Low-Cost PCB-Based High-Frequency AC Susceptometer for Magnetic Materials Characterization
… AC susceptometer designed to characterize magnetic materials up to 200 MHz. Leveraging a low-cost printed circuit board (PCB) design and commercially available high-frequency electronics, femtoMag addresses limitations in conventional susceptometry by enabling measurements of magnetic …
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Circuits and passive components for radio-frequency power conversion
… power circuit design techniques and magnetic material characterization and application. In the aspect of circuit design techniques, the thesis investigates a new class of matching networks that overcomes a major limitation of rf converter circuits - their high sensitivity to loading …
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A Reluctance Actuator Gap Disturbance Testbed
… actuators are made of Cobalt Iron, the soft magnetic material with the highest flux density saturation. Both a single actuator and a double actuator were fabricated. The double actuator can impart a roll torque as well as a normal force. Finite Element Method was utilized to design the …
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Modeling effects of adding a flux channel to a planar magnet-coil actuator
… force depends on the current vector and the magnetic field vector. In this thesis the Lorentz force is altered by changing the direction and concentration of the magnetic field. Magnetic fields may be modeled as flux lines traveling from the north face of the magnet to the south face along …
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Synthesis and Characterization of Surface-Functionalized Magnetic Polylactide Nanospheres
… magnetite nanoparticle dispersion stabilizers. Magnetic nanoparticles are of interest for a variety of biomedical applications including magnetic field-directed drug delivery and magnetic cell separations. Small magnetite nanoparticles are desirable due to their established biocompatibility and …
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Fabrication and characterization of a magnetic bacterial nanocellulose for neurovascular reconstruction of cerebral aneurysms
… of weeks to months. We hypothesized that a material with magnetic properties can provide the force required to speed up re-endothelization across the aneurysm defect, since it can facilitate high cell density coverage at the damaged site in virtue of its ability to capture and retain …
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