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 107 for “"Magnetics."”.
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Electrochemical materials for integrated magnetics
… device comprising vertically oriented integrated magnetics. The major challenges addressed in this thesis fall into two main categories: 1) predictive modeling with computational lithography and computational electrochemistry to enable optimization of the VIA formation process and 2) the design …
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(MEMS) toroidal magnetics for integrated power electronics
… electronic circuits requires improvements in magnetics technology. This thesis focuses on the challenge of improving magnetics through the analysis, optimization, and design of air-core toroidal inductors for integration into high-efficiency, high-frequency power electronic circuits. The first …
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Thin film magnetics for integrated magnetic nano-structures
The past decades have 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 …
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A generalized approach to planar induction heating magnetics
This thesis describes an efficient numerical simulation technique of magnetoquasistatic electromagnetic fields for planar induction heating applications. The technique is based on a volume-element discretization, integral formulation of Maxwell's equations, and uses the multilayer Green's function …
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Planar Magnetics Design For Low-voltage Dc-dc Converters
… electromagnetic analysis and miniaturize magnetics within desired low profile as well as small footprint. A novel methodology based on FEM simulation is proposed. By introducing Maxwell 2D simulator, optimal interleaving structures can be found to reduce AC losses that cannot otherwise be …
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High Frequency, High Current Integrated Magnetics Design and Analysis
… while maintaining the superior performance. The magnetics used in resonant converters are very important to the success of the design. Often, the leakage inductance of the magnetics is used to control the ZVS or ZCS switching operation. This work presents a new improved magnetic solution for use …
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Low Voltage High Current Power Conversion with Integrated Magnetics
Very low voltage, high current output requirement have necessitated improvements in power supply's density and efficiency. Existing power conversion techniques cannot meet very stringent size and efficiency requirements. By applying the proposed magnetic integration procedure, new integrated …
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The electrodynamics of high frequency magnetics in power electronics
The electromagnetic behavior of magnetic devices used in power electronics circuitry, is studied in order to predict their performance within a context of desirable circuit parameters. Past efforts have focused on simplifications widely used in electric machinery applications. Due to the greatly …
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Low Temperature Co-fired Ceramics Technology for Power Magnetics Integration
… ceramics (LTCC) technology for power converter magnetics integration. Because magnetic samples must be fabricated with thick conductors for power applications, the conventional LTCC process is modified by cutting trenches in the LTCC tapes where conductive paste is filled to produce thick …
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Merged multi-stage power conversion : a hybrid switched-capacitor/magnetics approach
… conversion through a hybrid switched-capacitor/magnetics approach. Multiple circuits and system aspects of this approach are investigated in this thesis. A 70 W grid-interfaced solar micro-inverter with a multilevel energy buffer and voltage modulator (MEB) is developed to demonstrate the …
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Low power circuits with integrated magnetics for sensors and energy harvesting systems
… This work explores the use of integrated magnetics in microelectronics to enable low power, energy-efficient sensing, as well as energy harvesting to power the sensors, in a compact form factor. For industrial applications, we present the design of a bandwidth-scalable, integrated fluxgate …
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Thermal Design and Optimization for PCB Winding based High Frequency Planar Magnetics
… the thermal design and optimization of Planar magnetics. With system engineering approach, starting from a two stage DC/DC converter, and further extended to other types of resonant converters with planar core. The study aims to address the thermal challenges associated with these converters, …
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Optimization of LLC Resonant Converters: State-trajectory Control and PCB based Magnetics
… to MHz with gallium nitride (GaN) devices, the magnetics can be integrated into printed circuit board (PCB) windings. This dissertation proposes a novel matrix transformer structure and its design methodology. On the other hand, shielding technique can be employed to suppress the CM noise for …
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Design and Integration Techniques for High-Frequency PCB-Based Magnetics in Resonant Converters
… the power density. The proposed integrated magnetics can be automated in the manufacturing process. The magnetic size is reduced at this frequency, and planar magnetics using PCB winding become more relevant. PCB magnetics feature multiple advantages over Litz wire. The benefits are …
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PCB-Based High-Power DC/DC Converters with Integrated Magnetics for Battery Charger Applications
… integrated transformers. The proposed integrated magnetics can be scalable for higher voltage and higher power converters by assembling more 1UI-based elemental transformers. A SiC-based 1PCLLC converter prototype operating at 250-kHz switching frequency for 11-kW OBC applications was built with …
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High Frequency Bi-directional DC/DC Converter with Integrated Magnetics for Battery Charger Application
… us the opportunity to use PCB winding based magnetics due to the reduced voltage-second. Compared with conventional litz-wire based transformer. The manufacture process is greatly simplified and the parasitic is much easier to control. In addition, the resonant inductors are integrated into …
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Investigation and Design of Integrated Magnetics in High-power High-frequency Soft-switching DC/DC Converters for Battery Charger Applications
… power density and efficiency using scalable magnetics building blocks (SMBs). It outlines the specific contributions made toward improving manufacturing processes and enhancing system performance. First, a dual channel flux analysis method is proposed to analyze the flux distribution in …
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A flying capacitor multilevel dual-active bridge converter for interfacing high voltage in more-electric aircraft
… switching frequency, resulting in bulky magnetics. The addition of a flying-capacitor multilevel (FCML) converter provides a high-frequency alternative that enables use of medium-voltage GaN technology, reduced magnetics volume, and improved theoretical efficiency across its operating …
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Planar Magnetic Integration and Parasitic Effects for a 3 KW Bi-directional DC/DC Converter
… the size and weight is to use the planar magnetics for possible integration with the power circuit and thus eliminating the associated interconnections. Planar magnetics uses the printed circuit board as the windings. This will allow the magnetic component to be implemented into the …
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