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 148 for “"Power supplies"”.
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Power supplies for ultra low power applications
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Integrated EMI/Thermal Design for Switching Power Supplies
… of EMI and thermal performance for switch power supply by using the CAD tools. The methodology and design guidelines are developed. By using a boost PFC circuit as an example, an equivalent circuit model is built for EMI noise prediction and analysis. The parasitic elements of circuit …
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Interleaved conversion techniques for high density power supplies
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
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Integrated EMI Filters for Switch Mode Power Supplies
Because of the switching action, power electronics converters are potentially large EMI noise sources to nearby equipment. EMI filters are necessary to ensure electromagnetic compatibility. Conventional discrete EMI filters usually consist of a large number of components, with different shapes, …
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A multiplexed feedback solution for isolated digital power supplies
As digital power supply became a significant market opportunity, manufacturers started looking at ways to control the system cost by reducing components and their technical requirements. This thesis proposes a multiplexed digital feedback solution for isolated digital power supply systems. Several …
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Design of rectifier power supplies for Thermal Energy Storage System
… For electrical part; asymmetric and symmetric power electronic rectifier are investigated and compared with low frequency modulation and pulse width modulation techniques, based on their power factor (PF) and total harmonic distortion (THD). Finally, direct output voltage control and cascaded …
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A scientific approach to EMI reduction in switching power supplies
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
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Single phase trapezoidal AC power supplies for hybrid fiber/coax networks
Single phase ac power supplies are used to power hybrid fiber/coax (HFC) networks. These power supplies are required to produce a trapezoidal-shaped voltage waveform. Conventional power supplies having a front-end diode bridge rectifier and a large dc bus capacitor are an unacceptable approach for …
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Non-intrusive efficiency estimation of induction machines under various power supplies
Considering that 45% of the world's generated electricity is consumed by induction machines, determining an induction motors efficiency non-intrusively is of great importance in that it enables the machine to operate productively whilst ensuring that the energy consumed by the machine is utilized …
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High-resolution Digital Pulse width Modulation Techniques for Digitally Controlled Power Supplies
L'abstract è presente nell'allegato / the abstract is in the attachment
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Electrical, Thermal, and EMI Designs of High-Density, Low-Profile Power Supplies
… and designs of high-density, low-profile power supplies, including the electrical, thermal, and EMI aspects. Emphasis is placed on forward and flyback converters. The efficiency improvements of employing synchronous rectification are theoretically derived and experimentally verified in …
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Technology transfer as invention and innovation : a case study on hybrid power supplies
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, and Sloan School of Management, 1991.
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Transformer Shielding Technique for Common Mode Noise Reduction in Switch Mode Power Supplies
Switch mode power supplies are widely used in different applications. High efficiency and high power density are two driving forces for power supply systems. However, high dv/dt and di/dt in switch mode power supplies will cause severe EMI noise issue. In a typical front-end converter, the EMI …
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A capability for continuous topology transient analysis in SCR switching-mode power supplies
A general purpose computer model for the SCR is developed. The model, consisting of both a circuit analog and parameter estimation procedure, is uniformly applicable to popular computer aided design and analysis programs such as SPICE2 and SCEPTRE. The circuit analog is based on the intrinsic three …
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Hybrid SC-Inductive Based Topologies for Low-volume High-efficiency Switched-mode Power Supplies
Switched-mode power supplies (SMPS) are widely used as the voltage or current regulators for electronic devices. The most commonly used SMPS are inductive converters based on conventional buck and boost converter topologies due to their simplicity and relatively high power density and efficiency. …
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Non-linear Dynamic Transformer Modelling and Optimum Control Design of Switched-mode Power Supplies
With recent advances in semiconductor manufacturing and computational technology, digital control systems have grown to a relatively mature stage, and will soon become a viable replacement for their analogue counterparts in the design of isolated and non-isolated DC-to-DC converters in general, and …
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Improved Resonant Converters with a Novel Control Strategy for High-Voltage Pulsed Power Supplies
… growing demand for high voltage, compact pulsed power supplies has gained great attention. It requires power supplies with high power density, low profile and high efficiency. In this thesis, topologies and techniques are investigated to meet and exceed these challenges. Non-isolation type …
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Modeling and Mitigation of EMI from Near-Field Coupling Effects in Front-End Power Supplies
Switch-mode power converters are essential in many emerging and rapidly evolving industries including renewable energy, electrified transporation, telecommunications, and datacenters. Increasing performance demands in these markets have driven significant advancements in the development of …
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Novel load identification techniques and a steady state self-tuning prototype for switching mode power supplies
Control of Switched Mode Power Supplies (SMPS) has been traditionally achieved through analog means with dedicated integrated circuits (ICs). However, as power systems are becoming increasingly complex, the classical concept of control has gradually evolved into the more general problem of power …
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