J M Woodgate BSc(Eng) C.Eng MIET SMIEEE FAES HonFInstSCE J M Woodgate and Associates jmw@jmwa.demon.co.uk www.jmwa.demon.co.uk These days, it's common practice to buy-in mains input filters in the shape of metal boxes with four or five terminals. The supplier's lists may be consulted, and advice sought, but often the same filter as was used for a previous product is … [Read more...]
CISPR 32 – What is it, Why was it Written and Where is it Going?
Ghery S. Pettit, NCE President, Pettit EMC Consulting LLC Introduction CISPR 32, “Electromagnetic compatibility of multimedia equipment – Emission requirements” was first published in 2012. This standard came about due to a major development in consumer electronics, the digital television receiver. The CISPR is a special committee of the IEC. CISPR stands for … [Read more...]
Automotive RF Immunity Test Set-up Analysis: Why Test Results Can’t Compare
Mart Coenen, EMCMCC bv, Eindhoven, the Netherlands Hugo Pues, Melexis NV, Tessenderlo, Belgium Thierry Bousquet, Continental, Toulouse, France ABSTRACT Though the automotive RF emission and RF immunity requirements are highly justifiable, the application of those requirements in an non-intended manner leads to false conclusions and unnecessary redesigns for the electronics … [Read more...]
Why Are There So Many EMC Standards?
Steve Hayes, TRaC Global, Worcestershire, United Kingdom; Jack McFadden, Wyle Laboratories, Huntsville, Alabama, USA; Steve O’Steen, Advanced Compliance Solutions, Atlanta, Georgia, USA; Kenneth Wyatt, Wyatt Technical Services, Woodland Park, Colorado, USA; David Zimmerman, Spectrum EMC Consulting, Eagan, Minnesota. October 2011 sees the end of the transitional period from … [Read more...]
Transient Voltage Suppressors (TVS) for Automotive Electronic Protection
Soo Man (Sweetman) Kim, Vishay Intertechnology, Inc., Malvern, Pennsylvania, USA A major challenge in automotive design is protecting electronics – such as control units, sensors, and entertainment systems – against damaging surges, voltage transients, ESD, and noise that are present on the power line. Transient voltage suppressors (TVS) are ideal solutions for automotive … [Read more...]
Designing Electronic Systems for EMC: Grounding for the Control of EMI
There are two primary reasons for grounding devices, cables, equipment, and systems. The first reason is to prevent shock and fire hazards in the event that an equipment frame or housing develops a high voltage due to lightning or an accidental breakdown of wiring or components. The second reason is to reduce EMI effects resulting from electromagnetic fields, common impedance, … [Read more...]
EMC and the Smart Grid
In April 2011 this author published an article dealing with the threats and potential impacts to the future U.S. Smart Grid from high power electromagnetic (HPEM) threats including High-altitude Electromagnetic Pulse (HEMP) from a nuclear detonation in space over the U.S., Intentional Electromagnetic Interference (IEMI) from terrorists or criminals who may attack and create … [Read more...]
A Comparison between Gelatinous and Tacky Coated Type Packaging Carriers
Robert J. Vermillion, RMV Technology Group, LLC, NASA-Ames Research Center, Moffett Field, California USA; Doug Smith, DC Smith Consultants, Los Gatos, California, USA For years, semiconductor and aerospace engineers have fielded questions regarding the suitability of using gelatinous and tacky coated packaging materials for the distribution, storage, and sale of ESD sensitive … [Read more...]
A Time-Domain EMI Measurement System Up to 26.5 GHz with Multichannel APD Measuring Function
I. INTRODUCTION The advances in radio systems in the past and their ongoing progress has been joined by advances in measurement systems and, hence, they require further development of measurement and specification standards. Electric and electronic systems have to be designed and realized such that the escape of unwanted electromagnetic energy into the environment is … [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...]
