Series-mode filters contain residual surge voltage within normal power line voltage ranges while avoiding the inconvenience and costs of downtime J. RUDY HARFORD, Zero Surge Inc. WITHIN THE MODERN home and workplace, an ever-growing number of sensitive electronic systems are vulnerable to power line surges that can disrupt or damage vital equipment. Obviously, a filter that … [Read more...]
The New EU Automotive EMC Directive
The essential information about which tests apply to automotive product types is now contained within the one directive. Martin O’Hara, Trafficmaster, Cranfield, Beds, UK INTRODUCTION This article discusses the changes implemented in the new European Automotive EMC directive 2004/104/EC1. The new directive, released in November 2004, effectively replaces the existing … [Read more...]
Antenna Selection for Automotive EMC Emissions and Immunity Applications (100 kHz to 18 GHz)
Optimum antenna selection plays a vital part in effective automotive emissions testing VICENTE RODRIGUEZ, PH.D. INTRODUCTION The following article describes the best antennas for meeting the requirements of full vehicle automotive EMC. The document is divided in to two main sections: Emissions and Immunity. The purpose of this article is to enlighten users on the best solution … [Read more...]
2005 Update on Intentional Electromagnetic Interference (IEMI)
IEMI refers to the deliberate attempt to produce EMI to interfere with commercial equipment. Dr. William A. Radasky, Ph.D. Metatech Corporation, Goleta, CA INTRODUCTION Over the past few years several articles have been written by this author and others indicating the threat and importance of intentional electromagnetic interference (IEMI).1–4 Since the publication of the … [Read more...]
First Amendment to the International Standard for EMC on Medical Devices
Amendment 1 to IEC 60601-1-2 is worth a careful reading by anyone involved in the design, manufacturing and/or testing of electrical medical equipment. Daniel D. Hoolihan Hoolihan EMC Consulting, Lindstrom, MN In September of 2004, the International Electrotechnical Commission (IEC) released Amendment 1 to the Second Edition of IEC 60601-1-2. This Amendment was prepared by … [Read more...]
EMC Assessment of Programmable Controllers: Choosing the Appropriate Standards
Using out-dated standards may result in erroneous conclusions regarding the true electromagnetic compatibility of the device under test. Nikolai Panteleev and Borislava Medzhidieva EMC Testing Laboratory, Sofia, Bulgaria Programmable logic controllers (PLCs) are widely used in industrial control systems for several reasons. Using specialized languages, they are easy to … [Read more...]
Achieving EMC in Pharmaceutical Industry Equipment – A Case Study
The many devices used in an industrial setting can present significant challenges in emissions control. Vinod Kumar Dhar Electronics Regional Test Laboratory (West), Indian Ministry of Information Technology, Mumbai, India While controlling electromagnetic interference is a worldwide challenge encountered in homes, shops, and offices, that task can be particularly difficult … [Read more...]
Three-Line Filters Are Cost Optimized
The series FMAC ECO and FMBC ECO from Schurter Electronic Components are compact, cost-optimized filters that feature Schurter’s ECO design. They are especially well suited to drive systems, engineering installations, and any application in which frequency inverters cause electromagnetic disturbances. These filters have been configured for use with 480-VAC installations and are … [Read more...]
Murata to Purchase Capacitor Firm
Murata Manufacturing Company, Ltd., well known maker of filters, ferrite devices, and other electrical components, has announced that it has reached an agreement with Showa Denko K.K. to purchase that firm’s functional polymer capacitor business. The actual transfer of ownership is expected to take place later in 2009. The Murata announcement stressed its corporate commitment … [Read more...]
Satellite System Passes EMI, Acoustic, & Thermal Testing
In other news emphasizing the growing significance of satellite communications, the Boeing Company has announced that a Boeing-led team has completed the final testing and integration of the Space Based Space Surveillance (SBSS) system under development for the U.S. Air Force. When launched, the SBSS is intended to revolutionize U.S. space situational awareness by providing … [Read more...]