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 8 of 8 for “"EMI reduction"”.
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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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A spread-spectrum clock generator using phase interpolation for EMI reduction
… in order to reduce electromagnetic interference (EMI) spurs at the analog output signal of the DAC. Leveraging on a phase control architecture rather than a traditional PLL, the SSCG system is shown to reduce the spectral height a divided down clock spur up to 19.6dB. The SSCG is designed in …
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COMMON MODE VOLTAGE ELIMINATION IN THREE-PHASE FOUR-LEG INVERTERS UTILIZING PULSE DENSITY MODULATION
Common mode (CM) electromagnetic interference (EMI) is a phenomenon that negatively affects power electronics to include voltage source inverters. Typically, CM EMI reduction is achieved through passive measures such as CM chokes and passive filters. This thesis research explores removing the need …
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High Power Inverter EMI Characterization and Improvement by Auxiliary Resonant Snubber Inverter
Electromagnetic interference (EMI) is a major concern in inverter motor drive systems. The sources of EMI have been commonly identified as high switching dv/dt and di/dt rates interacting with inverter parasitic components. The reduction of parasitic components relies on highly integrated circuit …
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The radiation physics, mitigation approaches and design guidelines of high-speed connectors and cables analyzed with numerical modeling, analytical formulation and measurements
… Design guidelines of high-speed connectors for EMI mitigation are proposed based on the analysis of radiation physics.</p><p>In the third paper, the 2D finite element method (2D FEM) is developed to analyze electromagnetic interference (EMI) reduction when magneto-dielectric absorbing materials …
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High-Frequency Oriented Design of Gallium-Nitride (GaN) Based High Power Density Converters
… increased electromagnetic interference (EMI) in the gate loop and the power stages, the lack of the modules of packages for high current application, high gate oscillation under parallel operation. The dissertation is developed to addressed the all the challenges above to fully explore …
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Control, Analysis, and Design of SiC-Based High-Frequency Soft-Switching Three-Phase Inverter/Rectifier
… capacitance and to improve the CM noise reduction performance. The soft-switching ac-dc converter built with the final PCB magnetics features almost similar efficiency compared to that with litz-wire inductor and 14 to 18 dB CM noise reduction up to 15 MHz. Lastly, the soft-switching …
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Digital enhancement techniques for fractional-N frequency synthesizers
… bandwidth, the electromagnetic interference (EMI) is dramatically reduced. A conventional PLL clock generation approach suffers from a slow frequency settling and limited spread spectrum modulation capabilities. The proposed open loop fractional divider architecture overcomes the bandwidth …