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Interference Technology

For EMI / EMC Engineers

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Shielding

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...]

Numerical Solution of Complex EMC Problems Involving Cables with Combined Field / Transmission Line Approach

 

Many problems of electromagnetic compatibility and interference involve cables, which either radiate through imperfect shields and cause coupling into other cables, devices or antennas, or which receive (irradiation) external electromagnetic fields (radiated from antennas or leaked through other devices) and then cause disturbance voltages and currents potentially resulting in … [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...]

Troubleshooting Radiated Emissions Using Low-Cost Bench-Top Methods

 

Kenneth Wyatt Wyatt Technical Services LLC Editor's Note: Click on the pdf icon at left for a printable copy of this article. Because time-to-market and budget factors often drive many of today’s high-tech designs, electromagnetic compatibility (EMC) issues often surface at the last moment in the design cycle, potentially delaying product introductions. Very often, simple … [Read more...]

Connectors for Electrical Systems of Hybrid, Electric Vehicles

 

Amphenol’s new ePower 400A connector series is designed for the demanding requirements of hybrid, electric vehicles and utility trucks electrical systems, operating at 800vdc to 1000vdc with a 300 to 500A rating. The product incorporates the patented RADSOK® technology for higher amperage, lower T-rise, less resistance and mating force. It offers a 40% smaller footprint than … [Read more...]

Shielded Plastics for Electric Vehicles

 

SABIC Innovative Plastics is collaborating with IAV GmbH to develop advanced thermoplastic solutions that can replace metal in electric vehicle and hybrid powertrain components. The company says that in hybrid-electric vehicles, the higher the voltage, the more important electromagnetic interference/radio frequency interference shielding becomes to control the potential … [Read more...]

EMC Business Bulletin – April 20, 2011 – Volume 11

 

EMV Show Review, Europe Market Study Offer Promising Signs There are two key indicators that the European EMC market is showing signs of steady growth this year. 1.       The 2011 EMV Show At the EMV show, which  took place in Stuttgart last month, the number of workshop attendees increased 15% over the last time this event was held in 2009, up from 923 people to 1082. … [Read more...]

Halogen-Free Line of Flexible Conduits

 

Electri-Flex Company has expanded their line of halogen-free liquid-tight flexible electrical conduit by introducing an EMI/RFI shielded version. Part of the Shield-Flex™ line, Types HFSLA™, HFEMS™ and HFEMCS™ provide exceptional shielding effectiveness from electromagnetic and radio frequency interference (EMI/RFI) coupled with the halogen-free jacketing. Halogen-free conduits … [Read more...]

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