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 21 for “"integrated magnetic"”.
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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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Modeling and Design of Planar Integrated Magnetic Components
Recently planar magnetic technologies have been widely used in power electronics, due to good cooling and ease of fabrication. High frequency operation of magnetic components is a key to achieve high power density and miniaturization. However, at high frequencies, skin and proximity effect losses …
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Microfluidic Concentration Gradient Generation and Integrated Magnetic Sorting of Microparticles
… (CGG) devices are presented; for cell sorting, a magnetically The most prevalent type of CGG devices, i.e., complete mixing-based laminar-flow CGG devices, involves massive channel networks. The design of alternative laminar-flow CGG devices suffers lack of efficient and systematic design …
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Integrated magnetic components for high-power high-current dc-dc converters
… is focused on the design and development of an integrated magnetic (IM) structure for use in high-power high-current power converters employed in renewable energy applications. These applications require low-cost, high efficiency and high-power density magnetic components and the use of IM …
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Low Voltage High Current Power Conversion with Integrated Magnetics
… requirements. By applying the proposed magnetic integration procedure, new integrated magnetic circuits featuring low loss, simple structure, and ripple cancellation technique are then developed to overcome the limitations of prior art. Both cores and windings are integrated. …
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Multiphase Voltage Regulator Modules with Magnetic Integration to Power Microprocessors
… to develop advanced topologies and innovative integrated magnetics for high-efficiency, high-power-density and fast-transient VRMs. The optimization of multiphase VRMs has also been addressed. Today's multiphase VRMs are almost universally based on the buck topology. With increased input …
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Magnetic domain walls for on-chip transport and detection of superparamagnetic beads
Surface-functionalized superparamagnetic (SPM) microbeads are of great interest in biomedical research and diagnostic device engineering for tagging, manipulating, and detecting chemical and biological species in a fluid environment. At the same time, lab-onchip technologies have grown popular due …
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Airgap-less Electric Motor
… the internal flux and therefore the electromagnetic torque. A higher torque density motor is proposed in this dissertation due to a reduced reluctance caused by zero airgap situation. A comparison with other high torque density electric machines demonstrates the advantages of the proposed …
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Piezoelectric Transformer and Hall-Effect Based Sensing and Disturbance Monitoring Methodology for High-Voltage Power Supply Lines
… disadvantages like higher cost, size, electromagnetic interference, resistive losses and measurement errors and hence provide a number of opportunities for improvement and integration. We present a novel microsystem methodology to sense low-power voltage and current signals and detect …
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Study on Three-level DC/DC Converter with Coupled Inductors
… interleaved structure, with coupled and integrated magnetics to achieve high power density. The proposed interleaved phased legs offer the benefit of output current ripple reduction, while inversed coupled inductors can suppress the circulating current between phase legs. Compared with …
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A Bifunctional Nanocomposites Based Electrochemical Biosensor for In-field Detection of Pathogenic Bacteria in Food
… foods. It was based on the techniques of immunomagnetic separation, enzyme labelling, and electrochemical impedance spectroscopy (EIS). This impedimetric immunosensor was capable of specifically detecting E. coli O157:H7 and S. Typhimurium within the range of 102 to 106 colony forming unit …
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An HBT magnetic sensor with integrated 3-dimensional magnetic structures
… functionality. This thesis describes a work on magnetic field sensors based on an InP/InGaAs heterojunction bipolar transistor (HBT) which has been fabricated to be compatible with high frequency epilayer structure and processes. In this work, the complete fabrication process for the HBT …
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Análise de observações do diâmetro no contexto da atividade solar
… solar activity: Flare Index, Total Irradiance, Integrated Magnetic Field, Sunspot Number and 10.7cm Radio Flux. The hypothesis of variation of the Semidiameter tied to the solar activity, otherwise being its estimator, was examined through the correlations between the different pairs of …
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Topology investigation of front end DC/DC converter for distributed power system
… and fundamental component simplification. Magnetic design is also discussed. The proposed integrated magnetic structure could achieve smaller volume, higher efficiency and easy manufacture. To make practical use of the topology, over load protection is a critical issue. Three methods to …
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Electrochemical materials for integrated magnetics
Next generation microinductors with magnetically enhanced VIA technology hold great promise for power converter applications in broad technology domains such as automotive, space, high-end computing, mobile devices, radio frequency (RF), artificial intelligence (AI) and the internet of things …
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Nanostructured magnetic materials for integrated magnonic devices
… coupled (EC) nanoheterostructures and their magnetic properties. Current challenges in the field of magnetics include the development of materials that demonstrate tunable magnetic properties, particularly in terms of controlling anisotropy and spin dynamics at the nanoscale. This thesis …
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High Frequency, High Current Density Voltage Regulators
… transformer that can be implemented with integrated magnetics. The transformer then becomes an integrated magnetic with distributed windings, which is preferred in high current applications. The current-tripler DC-DC converter in fact meets the requirements for the CCB self-driven scheme. …
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Characterisation of focused ion beam nanostructures by transmission electron microscopy
… the modifcation and control of the properties of magnetic thin films. Basic magnetic properties such as coercivity and local anisotropy direction can be altered in NiFe (Permalloy) films, whilst for Co/Pd multilayers, ion irradiation results in a transition from perpendicular to in-plane …
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Self-bearing motor design & control
… for high efficiency and compact systems with integrated magnetic levitation for high speed and high precision applications. One of the major disadvantages of existing self-bearing motors for high speed application is their rotor mechanical construction. Either the permanent magnet or induction …
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Power Architectures and Design for Next Generation Microprocessors
… at high frequency, in order to reduce the magnetic components size, while achieving high-efficiency. The high-efficiency first-stage, along with the scalability and high bandwidth control of the second-stage, allows this architecture to achieve high-efficiency and power density. This …
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