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 36 for “"Differential-Mode"”.
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Exploring the properties of a combined differential-mode equalizer and common-mode filter
As differential signaling becomes more and more desirable, innovative solutions must be sought to keep size and cost to a minimum. This thesis analyzes a combination differential-mode equalizer and common-mode filter (DME-CMF) realized on a two-layer microstrip board. Measurements up to 25 GHz are …
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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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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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Current source dc-dc and dc-ac converters with continuous energy flow
… several new single-phase and three-phase differential-mode current source inverters that evolve from the basic dc-dc converter topologies. The switched, large-signal, and small-signal models of these converters are presented, and used to develop control strategies for the proposed …
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Switching mode power supply noise source impedance measurement and EMI filter characterization
… is verified experimentally both for common mode and differential mode, The signal injection method for common mode source impedance measurement is experimentally verified. That for differential mode source impedance measurement requires a faster equipment and is not fully verified. An EMI …
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The New Concept of GRACE Gradiometry and the Unravelling of the Mystery of Stripes
… for bringing the two GRACE spacecraft into a differential mode is introduced to fully capture the impact of charged particles on the instrumentation. The idea of differential mode is advanced to a method named gradiometer mode that leads to the estimation of gravitational gradients using GRACE …
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Inductance cancellation techniques with application to EMI filters and components
… addressing cancellation in common- and differential-mode filter topologies, such as those designed for reducing electromagnetic interference (EMI). A design methodology and fabrication process is presented for packaging a capacitor and matched inductance cancellation winding together to …
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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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Electromagnetics in characterizations
(cont.) Characterization of the differential guided mode of a coupled-strip transmission line allows us to understand its behaviors in high frequency circuit applications. S-parameters of the differential mode of a coupled-strip transmission line on a multi-layer silicon substrate extracted from …
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High-efficiency Transformerless PV Inverter Circuits
… principle are then described. The common mode and differential mode voltage model is then presented and analyzed for circuit design. Experimental results of a 250 W hardware prototype are shown to demonstrate the merits of the proposed MOSFET based phase-le and the proposed transformerless …
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Passive harmonic generation at spring contacts
… H-field probe at such a position leads to differential mode coupling which the standard shield of an H-field probe is unable to suppress. The coupling mechanism is investigated and a differential E-field coupling suppression approach is proposed.</p><p>In the third paper, a measurement …
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High Power Inverter EMI Characterization and Improvement by Auxiliary Resonant Snubber Inverter
… and measured with separation of common-mode and differential-mode noises. The noise reduction in an auxiliary resonant snubber inverter (RSI) is presented. The observation of voltage ringing and current ringing and the methods to suppress these ringing in the implementation of RSI are …
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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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Atomic Clock Augmentation For Receivers Using the Global Positioning System
… and airborne receivers processing GPS data in differential mode (DGPS). Among the error sources that cause a clock offset are antenna rotation, hardware drifts due to temperature variations, and relativistic effects for GPS receivers on moving platforms. Antenna rotation and temperature effects …
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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 Control of Parallel Three-Phase PWM Converters
This dissertation studies modeling and control issues of parallel three-phase pulse-width modulated (PWM) converters. The converters include three-phase boost rectifiers, voltage source inverters, buck rectifiers and current source inverters. The averaging of the parallel converters is performed …
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Circuits and Modulation Schemes to Achieve High Power-Density in SiC Grid-connected Converters
… three coupled inductors into two; one for differential-mode circulating current and the other for common-mode circulating current. By comparing with prior research work, a 20% reduction in size and weight is demonstrated. From Chapter 3 to Chapter 5, a full-SiC uninterruptible power supply …
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Magnetoelectric laminated composites and devices
… longitudinal direction. Symmetric bimorph and differential mode magnetoelectric laminates have been designed to reject (decrease) thermal and vibration noise sources, respectively. The mechanism for the noise cancellation capability is that the laminate operates in a bending (or longitudinal) …
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