Saudi Cultural Missions Theses & Dissertations
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Item Restricted Cosimulation Approach for High-Frequency Magnetic Component Modeling in DC-DC Converters(Western Michigan University, 2024-12) Alyami, Faraj; Gomez, Pablo; Asumadu, Johnson; T Meyer, RichardThis dissertation aims to evaluate the efficacy of a novel methodology to support the transient analysis and electromagnetic design of high-frequency transformers and inductors in power converters. By integrating finite element method (FEM)-based tools with dynamic analysis techniques, the proposed methodology accurately reflects the physical characteristics of high- frequency magnetic components under both steady-state and transient conditions in power converters. This approach addresses the stresses generated by the extensive integration of power electronic-interfaced sources, loads, and storage units in various power electronic topologies. High-frequency transformers and inductors are highlighted as crucial elements for the next generation of energy systems, driven by advancements in distributed power generation, DC power grids, energy storage, and sensitive electronic loads. High-frequency transformers offer benefits such as galvanic isolation, high power density, small size, low cost, high efficiency, output regulation, and improved electromagnetic compatibility performance, making them vital for modern energy applications. High-frequency inductors, on the other hand, enhance the efficiency of energy transfer, stabilize voltage regulation, and minimize switching losses in power converters, significantly improving the performance of photovoltaic power systems, electric drives, and adjustable power supplies. The proposed methodology is implemented through cosimulation between COMSOL Multiphysics® and MATLAB/Simulink®, demonstrating its potential to advance the design and analysis of high-frequency magnetic components.20 0Item Restricted The Impact of Textile Design on the Performance of an Educational Shading System: Building 2, Leonardo Campus, Polimi(Saudi Digital Library, 2023-10-05) Alsuwailem, Malak; Zanelli, Alessandra; Fiorenzi, AlbertoShading systems, such as roller shades, play a crucial role in affecting the indoor environment and the occupant’s well-being in educational settings. They can combine functionality and aesthetic appeal seamlessly. This is evident in their ability to improve the quality of spaces by providing visual comfort, fostering optimal learning conditions, facilitating task-specific activities, promoting energy conservation and enhancing aesthetics. To ensure achieving these effects significantly, lighting conditions, particularly natural lighting, must be considered and optimized. Indeed, natural lighting holds considerable significance in promoting the well-being of individuals within educational settings. Nevertheless, it is essential to note that natural lighting is frequently overlooked in several projects in educational buildings when aimed at works for interior transformations and adaptations. Especially in building 2 of the Leonardo campus at Politecnico di Milano, there is a major demand for processes and actions to increase awareness of the importance of natural light concerning well-being and energy savings. Thus, the goal of this study was to propose an advanced shading system and develop a textile design for this system that allows for adjustment of the level and distribution of light for the different educational activities and the variation of time (daily and seasonal) as well as weather conditions. This study concentrated mainly on roller shades and textile patterns. The study also sought to contribute to the future sustainability strategies of Politecnico di Milano's “Città Studi Sustainable Campus.”19 0