“Swap-in” connectors can be key in meeting tough emission specifications such as EN 55024 and CISPR 24 Dr. William E. Kunz Regal Electronics, Inc. Sunnyvale, California INTRODUCTION With clock frequencies of a few hundred megahertz, today’s electronic systems are using pulse edges in the sub-nanosecond range. Networking interfaces deliver data rates approaching 1000 Mbits/s … [Read more...]
EMC Management and Design in Military and Aerospace Systems—Avoiding the Pitfalls
A systematic approach to EMC engineering and management is the best way of achieving compliance. A.S. De Beer, Ph.D Ruphus Technologies (Pty) Ltd., Lonehill, South Africa ABSTRACT This article focuses on the necessity of following a systematic engineering approach in the design and testing of military and aerospace systems that must comply with stringent EMC Standards. It … [Read more...]
Optimizing EMI Filters Using Circuit Simulation
Simulation saves time, money, and effort in resolving EMI problems in any application. Chris Debraal Curtis Industries Milwaukee, WI The insertion loss of a power line EMI filter can be accurately predicted over a wide range of frequencies through circuit simulation. While analyzing the circuit, it is important to consider test modes and impedances, basic component values, … [Read more...]
EMC Pre-testing Simplifies NEBS Compliance
Introduction NEBS was developed by Bell Labs in the 1970s to standardize equipment that would eventually be installed in a phone company's central office (CO). Sorting out the acronyms, NEBS stands for "Network Equipment-Building System," a term used to describe the environment of a typical Regional Bell Operating Company (RBOC). To get a basic understanding of NEBS, visit … [Read more...]
Powerline Filter Cancels Surges
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...]
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...]
Reflections on Absorbers
High frequency, broadband performance links recent improvements in EMI shielding components Jim May, Ferrishield, Inc., Scranton, PA, USA Just as the electronics industry has experienced exponential change over the past decades, EMI shielding components have undergone vast changes and improvements. Just ten years ago, many of today's widely-used gaskets, filters, ferrites, … [Read more...]
Input Power – It’s More Than Just a Line Cord
The power distribution and control function has matured into a full-fledged design discipline. Roger Edelson Edelson Associates, Los Angeles, CA, USA Power distribution and control (and the associated cable management function), while not a sexy topic, has grown into a recognizable, and important, subset of industrial equipment design. Power distribution and control … [Read more...]
Integrated Inductive Component Reduces Radiated Emissions in Power Applications
The geometry of magnetic components can affect the incidence of unwanted low frequency radiation in the magnetic field. Gabriel Arianes, David Castillo, Raquel Garcia and Oscar Perez; Ferroxcube, Guadalajara, Spain INTRODUCTION The miniaturization trend has resulted in smaller components and greater board densities in electronic applications. This very density, which … [Read more...]
