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 266 for “"EMI"”.
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Lecturers’ Humour in English Medium Instruction (EMI): Insights from Indonesian EMI and non-EMI Contexts
… humour within English-medium instruction (EMI). While most EMI lecturers feel comfortable teaching in a second or foreign language (L2), they observe a decline in humour and interactivity when delivering content in L2 compared to their native language (L1). Switching the language of …
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Behavioral EMI-Models of Switched Power Converters
… behavioral electromagnetic interference (EMI) models have been shown earlier to accurately capture the EMI behavior of switched power converters. These models are compact, linear, and run in frequency domain, enabling faster and more stable simulations compared to the detailed lumped …
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Integrated EMI/Thermal Design for Switching Power Supplies
This work presents the modeling and analysis 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. …
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Modeling strategy for EMI filter and flyback transformer
… of the circuit introduces issues in conducted emissions. In a flyback converter, the transformer serves as the path for common mode current flowing from the primary side to the secondary side. Different winding technologies have been invented and implemented to reduce the capacitance between …
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Active filter techniques for reducing EMI filter capacitance
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Conducted EMI Noise Prediction and Filter Design Optimization
… is the stringent electromagnetic interference (EMI) regulation worldwide. For the CRM PFC converter, there are several challenges on meeting the EMI standards. First, for the CRM PFC converter, the switching frequency is variable during the half line cycle and has very wide range dependent on …
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Integrated EMI Filters for Switch Mode Power Supplies
… 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, sizes and form factors. The …
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Integrated Frequency-Selective Conduction Transmission-Line EMI Filter
… attenuator and the DM transmission-line EMI filter. The insertion gain, transfer gain, current distribution, and input impedance of the filter under a nominal design are discussed. In order to apply the transmission-line EMI filter to power electronics systems, the performance of the …
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The EMI content lecturer as a language policy broker
… the use of English as a Medium of Instruction (EMI) flared up in Flanders when the Ministry of Education rejected a request from the region’s three largest universities to offer 19 master’s programs in engineering entirely in English (Maenhout, 2023). In Flanders, Dutch is the official language, …
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Modeling and Analysis Methods for ESD and EMI Problems
… (ESD) failures and Electromagnetic interference (EMI) problems are becoming more critical in electronic devices and large systems. In this work, four studies are presented to model and analyze ESD and EMI problems.</p> <p>First, a simplified physical-based model for deep-snapback transient voltage …
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Review : integration of EMI technique with global vibration technique
… technique, the Electro-Mechanical Impedance (EMI) method, has emerged. EMI measures the electrical admittance by the impedance analyzer, and evaluates the health status of the structure by comparing the baseline signature with the damaged signature. It allows users to access the structure …
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EMI Noise Reduction Techniques for High Frequency Power Converters
… in switch mode power supplies will cause severe EMI noise issue. In a typical front-end converter, the EMI filter usually occupies 1/3 to 1/4 volume of total converter. Hence, reducing the EMI noise of power converter can help reduce the volume of EMI filter and improving the total power density …
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EMI Terminal Behavioral Modeling of SiC-based Power Converters
… However, electro-magnetic interference (EMI) becomes a more severe problem as a result. In this thesis, the switching frequency effect on conducted EMI noise is assessed. As EMI noise increases, the EMI filter plays a more important role in a power converter. As a result, an effective EMI …
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Finite Element Analysis of EMI in a Multi-Conductor Connector
… of the EM power. Electromagnetic Interference (EMI) from nearby excited conductors causes induced currents according to Faraday's law which is considered as noise for other conductors. This noise is affected by factors such as distance between the conductors, strength and frequency of currents, …
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Device and Circuit Level EMI Induced Vulnerability: Modeling and Experiments
Electro-magnetic interference (EMI) commonly exists in electronic equipment containing semiconductor-based integrated circuits (ICs). Metal-oxide-semiconductor field-effect-transistors (MOSFETs) in the ICs may be disrupted under EMI conditions due to transient voltage-current surges, and their …
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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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Inductance cancellation techniques with application to EMI filters and components
… for reducing electromagnetic interference (EMI). A design methodology and fabrication process is presented for packaging a capacitor and matched inductance cancellation winding together to create a self-contained integrated filter element.
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EMI Characterization and Improvement of Bi-Directional DC/DC Converters
… is concentrated on the circuit topology and EMI performance. Emphasis is placed on soft-switch, hard-switch, synchronized rectification, auxiliary start-up winding and their effect on EMI performance in this kind of isolated bi-directional converter. Comparison includes circuits analysis and …
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Reduction of power supply EMI emission by switching frequency modulation
… modulation on power supply conducted EM! noise emission is investigated. Significant reduction of emission is possible with PWM frequency modulation scheme. A forward converter is used to verify the effectiveness of the scheme. A guidance of parameter selection for noise reduction is given.
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