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 18 of 18 for “"Differential Mode (DM)"”.
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Separation of the common-mode and the differential-mode conducted electromagnetic interference noise
… is developed, which can be used to decipher the differential-mode (DM) noise and the common-mode (CM) noise from the total noise. A noise separator hardware is built and tested. The results show that at least 50 dB rejection to either DM or CM noise is achieved for frequency ranging from 10 KHz …
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A Compact Three-Phase Multi-stage EMI Filter with Compensated Parasitic-Component Effects
… adopted to attenuate the high frequency common mode (CM) and differential mode (DM) noise through the propagation path. However, self and mutual parasitic components are known to degrade the EMI filter performance. While parasitic cancellation techniques have been discussed at length in prior …
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In-home PLC to DSL Interference Characterization and Mitigation
… solution, this thesis proposes to use the common mode (CM) signal, which contains information about the electromagnetic interference (EMI), to estimate and subtract the differential mode (DM) PLC-to-DSL interference from the DM DSL signal. Since the PLC-to-DSL interference environment within a …
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High-Density Discrete Passive EMI Filter Design for Dc-Fed Motor Drives
… presents various strategies to reduce both differential mode (DM) and common mode (CM) noise using a passive filter in a dc-fed motor drive. Following a standard approach a baseline filter is first designed to be used as reference to understand and compare the available filter topologies. …
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Non-Intrinsic Differential-Mode Noise in Switching Power Supplies and Its Implications to EMI Filter Design
… to the conventional theory, there are two modes of noise: the Differential-Mode (DM) noise and the Common-Mode (CM) noise. Recently, a new noise-coupling mode called Non-Intrinsic Differential-Mode (NIDM) noise was uncovered accidentally in the process of explaining certain EMI filter …
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Frequency Domain Conductive Electromagnetic Interference Modeling and Prediction with Parasitics Extraction for Inverters
… dissertation is to focus on the development of modeling and simulation methodology to predict conductive electromagnetic interference (EMI) for high power converters. Conventionally, the EMI prediction relies on the Fast Fourier Transformation (FFT) method with the time-domain simulation result …
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Equivalent Modeling of Medium-Voltage Gate Drive Circuitry
… for WBG devices creates challenges for common-mode (CM) conducted emissions behavior that can also negatively affect the gate drive design. This dissertation leverages a decomposition technique to derive equivalent models for the differential-mode (DM) and CM behavior for a medium voltage gate …
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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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EMI Noise Reduction Techniques for High Frequency Power Converters
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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SiC-Based High-Frequency Soft-Switching Three-Phase Rectifiers/Inverters
… with the turn-on energy, critical conduction mode (CRM) based zero voltage soft switching turn-on operation is preferred for the SiC MOSFETs to eliminate the turn-on loss with small penalty on the conduction loss and on the turn-off loss. With this soft switching operation, switching frequency …
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Modeling, Implementation, and Simulation of Two-Winding Plate Inductor
… are studied in this dissertation in order to model the self-inductance, winding loss, and core loss. The most challenging task for the plate-core inductor is to model the magnetic field with finite core dimensions, very non-uniform flux pattern, and large fringing flux. The winding is placed …
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Generalized Terminal Modeling of Electro-Magnetic Interference
Terminal models have been used for various power electronic applications. In this work a two- and three-terminal black box model is proposed for electro-magnetic interference (EMI) characterization. The modeling procedure starts with a time-variant system at a particular operating condition, which …
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EMI Terminal Behavioral Modeling of SiC-based Power Converters
… a power converter. As a result, an effective EMI modeling technique of the power converter system is required in order to find an optimized size and effective EMI filter. The frequency-domain model is verified to be an efficient and easy model to explore the EMI noise generation and propagation in …
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Design of High-Density Filter Building Blocks for SiC-based Three-Phase Power Converters
… switching speeds and high slew rates, the common-mode (CM) and differential-mode (DM) conducted emissions interference (EMI) noise is worsened. The effects are manifested at the utility interface with grid-tied applications (three-phase rectifiers or back-to-back converters) in the form of high CM …
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Modular Approach for Characterizing and Modeling Conducted EMI Emissions in Power Converters
… studies EMI noise emission characterization and modeling in power converters. A modular-terminal-behavioral (MTB) equivalent EMI noise source modeling approach is proposed. This work is the first to systematically develop a 3-terminal EMI noise source model for a switching phase-leg device …
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Modeling and Characterization of Power Electronic Converters with an Integrated Transmission-Line Filter
In this work, a modeling approach is delineated and described in detail; predominantly done in the time domain from low frequency, DC, to high frequencies, 100 MHz. Commercially available computer aided design tools will be used to determine the propagation path in a given structure. Next, an …
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Investigation on Interleaved Boost Converters and Applications
… design. The interleaving impact on the Common Mode (CM) noise also has not been studied in any existing literatures for the same reason. In this study, the frequency domain analysis method was adopted. With the double Fourier integral transformation, a closed-form expression of all the …
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Digital-Based Zero-Current Switching (ZCS) Control Schemes for Three-Level Boost Power-Factor Correction (PFC) Converter
… laptop, monitor, LED lighting and server) in modern technology-driven lives, performance of switched-mode power supply (SMPS) for electronics have been growing to prominence. As front-end converters in typical SMPS structure, ac-dc power-factor correction (PFC) circuits play a key role in …