Dissertation Defense Announcement for Ashik Amin on 03/19/2024 at 2:00 PM
February 19, 2024
Dissertation Title: Common-Mode EMI Characterization and Mitigation in Networked Power Electronics-Enabled Power Systems
When: 19 March 2024, 2:00 PM
Where: Simrall 228
Candidate: Ashik Amin
Degree: Doctor of Philosophy in Electrical and Computer Engineering
Committee Members: Dr. Seungdeog Choi, Dr. Yong Fu, Dr. Masoud Karimi, Dr. David Wallace
Abstract
In this study, the overall network CM EMI and its non-linear behavior have been attempted to characterize. A new solution to mitigate the CM EMI is investigated for a largely networked converter that can be effectively applied to a medium voltage (MV) power electronic system has been investigated. An important CM EMI characterization parameter- CM EMI phase has been rigorously investigated. Based on the CM EMI phase control, an institutive destructive superposition technique has been proposed as a form of virtual filtering. Worst-case EMI modeling for N converters is analyzed. Analyzing the common-mode EMI phase as a contributing factor in the worst-case EMI scenario is done. Eventually, a hybrid EMI filter is designed with a virtual filtering technique to optimize the passive component in the power electronic layout. The filter optimization helps design a compact power electronic layout and reduces near-field EMI. Finally, a low-cost, non-destructive switching node capacitance characterization with regular probes and reducing dependency on proprietary information.