ON Semiconductor’s new range of common mode filter (CMF) devices have integrated electrostatic discharge (ESD) protection to suppress noise and provide strong signal integrity. The new EMI2121, EMI4182 and EMI4183 devices are highly suitable for implementation in smartphones, media tablets, wireless connectivity dongles and digital camcorders, as well as set top boxes and DVD … [Read more...]
Active Harmonic Filter for Variable Load PFC
MTE Corporation’s Matrix PureSine Active Harmonic Filter is a powerful filtering solution for coordinated variable load power factor correction (PFC), phase imbalance and harmonic mitigation. The PureSine comes standard in a wall mount configuration and supports 480V. The LCD display provides both English and Spanish text. The fully modular system allows the user to … [Read more...]
EMC Filters for Lifts and Escalators
Premo now include in its portfolio, EMC filters specially designed for lifting equipment and machines with variable speed, such as elevators or escalators.The new family is available from 7 to 250A and can operate in applications with nominal voltages of 520 Vac 50/60 Hz. Connections are made with safety terminal blocks, sized according to the current. Premo EMC has developed … [Read more...]
Three Phase Sine Wave Output Filters
Schurter’s new 3-phase sine wave output filters, series FMAC SINE and FMAC SINE DCL, are designed to convert output voltage wave forms produced by PWM (Pulse Width Modulation) frequency converters into low distortion sine wave forms for motor and power transformation applications resulting in significantly increased efficiency and life of the motor. The Schurter sine wave … [Read more...]
Compact 2-Stage EMI Line Filter Offers Three Design Configurations
Schurter’s new compact, high grade EMI-filter series FMBB NEO filter family consists of three different 2-stage filter designs (Design C, Design D and Design F), which are characterized by a high symmetrical and asymmetrical attenuation. The FMBB NEO filter Design C attenuates potentially strong conducted interferences. Design D is laid out for the attenuation of high frequency … [Read more...]
Measurements above 1 GHz in Time-Domain: Theory and Application
Christian Hoffmann, Technische Universität München, Lehrstuhl für Hochfrequenztechnik, Munich, Germany; Stephan Braun, GAUSS Instruments GmbH, Munich, Germany Arnd Frech, GAUSS Instruments GmbH, Munich, Germany; Peter Russer, Technische Universität München, Lehrstuhl für Nanoelektronik, Munich, Germany Time-domain electromagnetic interference (EMI) measurement systems are … [Read more...]
On the Radiation Patterns of Common EMC Antennas
Vincente Rodriguez, ETS-Lindgren LP., Cedar Park, Texas, USA Antennas have been used in EMC measurements since the early days. Knowledge of the antenna pattern was not a requirement of the standards. While MIL STD 461 and some SAE standards called for information on the half power beamwidth, most standards did not require any knowledge of the antenna radiation characteristics. … [Read more...]
Accurate Feedthrough Capacitor Measurements at High Frequencies Critical for Component Evaluation and High Current Design
The shunt capacitor is the critical element in almost all low pass filters. Feed-through capacitors are configured as a center electrode passing through a grounded housing, which contains the desired capacitance from the electrode to the grounded housing, and practically eliminates lead inductance. This article will explain the importance of feedthrough capacitors, and provide … [Read more...]
Going from Analog to Digital
Philip F. Keebler, EMC Group, Electric Power Research Institute, Knoxville, Tennessee USA; Stephen Berger, TEM Consulting, LLC, Georgetown, Texas USA Nuclear power plants (NPPs) in the United States have been undergoing upgrades from analog instrumentation and control (I&C) equipment to digital equipment over the past several years. Upgrades have been occurring on the … [Read more...]
High Power Electromagnetic (HPEM) Threats to the Smart Grid
This paper is focused on the threats and impacts of High Power Electromagnetic (HPEM) environments on the U.S. Power Grid and further introduces the implications of making the power grid “smarter” through the introduction of additional electronics. These Smart Grid electronics may introduce additional vulnerabilities if the grid is exposed to the high power EM threats of … [Read more...]
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