An efficient shield room for automotive testing progresses from design to finished structure Michael Koffink, Bob Mitchell Intertek ETL Semko Littleton, MA Four years ago, we noticed a growing demand for EMC testing from the automotive industry. As cars and trucks now feature myriad on-board electronic devices, they are increasingly susceptible to stray emissions while … [Read more...]
Lithium-zinc Ferrite for the Suppression of Electromagnetic Noise
Studies show that Li-Zn ferrites can successfully suppress EMI N.C. Joshi, S.S. Islam, Ph.D., Jamia Islamia University Jamia Nagar Anjali Verma, Ph.D., Indian Institute of Technology New Delhi, India Recent technological development has been characterized by an unprecedented proliferation of digital technology in information and communications equipment. The worldwide … [Read more...]
Understanding Inductance in the Real-world
As soon as current flows through metal conductors, inductance exists Bruce Archambeault, Ph.D., IBM Distinguished Engineer, IBM, Research Triangle Park, NC The concept of inductance is one of the most misunderstood concepts in electrical engineering. Terms such as ‘self inductance’, ‘loop inductance’, ‘partial inductance’, ‘mutual inductance’ are used with little concern … [Read more...]
Enclosure Suppresses EMI in Military Airborne Configurations
A highly ruggedized system enclosure from One Stop Systems (OSS) targets military and airborne applications. Constructed of solid seam-welded aluminum, the 11U high enclosure measures 19″ (H) x 25″ x 17″ (W) and weighs 56 pounds. It contains a 3U 15-slot CPCI backplane and features a “floating card that sits within the enclosure and is surrounded by four banks looped cable … [Read more...]
Murata’s EMI Filter Selection Simulator (Ver. 3.5.0)
Murata’s filter experts have updated their filter selection software. It’s now available in version 3.5.0. This revised and improved package will simulate the effects of EMFIL® and chip capacitors.Learn moreabout this valuable tool; then download 6.1 Mbytes of information formaking the right EMI filter choice. … [Read more...]
More Aerospace Products
High-Voltage Disc Capacitors Suit Aerospace and Industrial ApplicationsThe Cera-Mite 715CxxKT series, a family of single-layer devices from Vishay Intertechnology, are screw-mount disc capacitors offered in a wide range of diameters and capacitance values over rated voltages from 10 k VDC to 40 k VDC. With low AC and DC coefficients and a negligible … [Read more...]
Enclosure Suppresses EMI in Military Airborne Configurations
A highly ruggedized system enclosure from One Stop Systems (OSS) targets military and airborne applications. Constructed of solid seam-welded aluminum, the 11U high enclosure measures 19″ (H) x 25″ x 17″ (W) and weighs 56 pounds. It contains a 3U 15-slot CPCI backplane and features a “floating card that sits within the enclosure and is surrounded by four banks looped cable … [Read more...]
Expanded Filter Family Assures EMC Compliance in High Power Applications
The new FN 3280 from Schaffner has been expanded for use in higher power applications with new sizes including 300 A, 400 A, and 600 A. The new high-performance EMI filters are well suited to use in large industrial machines and plants with numerous motor drives, long motor cables, and high interference levels—as well as inverter and converter applications such as UPS … [Read more...]
Measurement of Intermittent Emissions with a Time-Domain EMI Measurement System
With time-domain EMI measurement, a single scan can test intermittent radiating devices quickly and accurately. Stephan Braun and Peter Russer, Institute for High Frequency Engineering Munich University of Technology Munich, Germany For some time, measurements of electromagnetic interference have been carried out by super-heterodyne receivers operating in the frequency … [Read more...]
Power Supply Capacitors Offer High Capacitance in a Reduced Footprint
The TurboCap™ MLCs (multilayer capacitors) from AVX Corporation are stackable capacitors that feature a compact footprint to conserve PCB space. These patent-pending devices offer both high capacitance values and low ESR and can handle high ripple current at high frequencies and power levels. TurboCaps are well suited for use in filters in the input and output stages of DC/DC … [Read more...]
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