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 11 of 11 for “"common-mode (CM) noise"”.
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Separation of the common-mode and the differential-mode conducted electromagnetic interference noise
… available. In this thesis work, a tool, called Noise Separator, 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 …
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Current-Transformer Based Gate-Drive Power Supply With Reinforced Isolation
… CI/O is designed less than 2 pF to mitigate the Common-Mode (CM) noise. A circuit topology analysis is performed and the inductor/capacitor/capacitor/inductor (LCCL) – inductor/capacitor (LC) circuit is selected. This circuit allows Zero-Voltage Switching (ZVS) at full operation range. A …
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High-Density Discrete Passive EMI Filter Design for Dc-Fed Motor Drives
… 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. Furthermore, it …
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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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Design Optimizations of LLC Resonant Converters with Planar Matrix Transformers
… of the planar transformer is investigated and modeled, and design guidelines for filter capacitor selection are provided for optimal efficiency. Next, the existing shielding technique for matrix transformers, which helps reduce common-mode (CM) noise without compromising on efficiency, is …
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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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Control, Analysis, and Design of SiC-Based High-Frequency Soft-Switching Three-Phase Inverter/Rectifier
… silicon carbide (SiC)-based critical conduction mode (CRM) high-frequency soft-switching three-phase ac-dc converters (inverter and rectifier). The soft-switching technique with SiC devices grounded in CRM makes the operation of the ac-dc converter at hundreds of kHz possible while maintaining …
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Electromagnetic Interference and Compatibility within SiC-based Medium Voltage Converters
… even more difficult. Unlike converter-level noise emissions which can be regulated by certain EMI/EMC standards, the noise inside the power converter has no standard to follow. Moreover, even if a converter complies with certain standards at its terminals, the internal components are not …
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Investigation on Interleaved Boost Converters and Applications
… filter 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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Topology and Control Investigation of Soft-Switching DC-DC Converters for DC Transformer (DCX) Applications
… symmetric 3-level buck-boost converter with common-mode (CM) noise reduction. In the first battery charger, a large portion of the power is handled by an 18 kW CLLC-DCX, and the remaining partial power goes through a 3-phase interleaved buck converter. The proposed switching transition …
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PCB-Based High-Power DC/DC Converters with Integrated Magnetics for Battery Charger Applications
… AC/DC converter working at critical conduction mode (CRM) so that soft switching can be achieved for all the fast switches. The second stage is single phase CLLC (1PCLLC) converter which is attractive due to its less component counts of devices and driver circuits. A novel matrix integrated …