The 2011 Interference Technology EMC Directory & Design Guide includes 13 technical articles, information on professional societies, a directory of government personnel involved in EMI/EMC, a recap of standards published in 2010-2011, and the EMC Buyers’ Guide, which provides an up-to-date look at the providers of more than 200 EMC-related products and services. Read and … [Read more...]
The IET’s Guide on EMC for Functional Safety
When correctly applied, real financial savings can be expected, along with a significant reduction in financial risks. Keith Armstrong, Cherry Clough Consultants, Stafford, UK Electronic complexity is increasing with no end in sight, increasing self-generated noise levels, while the feature sizes in silicon integrated circuits continue to shrink, making them emit more noise … [Read more...]
2010 Update on IEMI and HEMP
INTRODUCTION It has been three years since the state of the art dealing with IEMI and HEMP has been updated in the Interference Technology Annual EMC Guide in 2007 [1]. A significant amount of work has been accomplished worldwide during this period. This paper will review significant special sessions and tutorials at International EMC Conferences, published papers and reports, … [Read more...]
Protection of Variable Speed Drives Utilizing the Cascade Protection Approach
In today’s competitive industrial environment, maximization of operations is essential, and companies cannot risk system malfunction or potential failure due to power disruptions. The end result can be disastrous, ending in loss of production, profits, clientele, and ultimately, complete operational failure. This makes the quality of power of vital importance. Consequently, … [Read more...]
Extending the Concept of Common Mode Noise: Single Mode
Electronic switching circuits are used for power conversion, data communication and other applications. According to the theory of Fourier Transform, in these circuits, the periodical change of the current/voltage produces harmonics in a wide frequency spectrum. The resultant currents of these harmonics are called conducted emission (CE), and are categorized classically as … [Read more...]
COTS Alternatives to MIL SPEC Flexible Conduit Systems for EMI/RFI Containment
Applications, electrical and physical performance, termination and installation factors of shielded flexible conduits. Linda Sardone, Zero Ground Electronic solutions for military and government equipment and installations are expanding rapidly, and the need for supplemental shielding of cable runs via conduit is moving beyond traditional applications requiring MIL SPEC … [Read more...]
In-situ EMC Testing Using Surface Current Sense Wires
Mart Coenen, EMCMCC bv, Eindhoven, the Netherlands Tim Maas, ASML bv, Veldhoven, the Netherlands Yili Hu, Student Eindhoven University of Technology, the Netherlands Arthur van Roermund, Eindhoven University of Technology, the Netherlands ABSTRACT In-situ EMC testing is, for large fixed systems and installations within the scope of the European EMC Directive, not a primary … [Read more...]
Introduction to Composite Electromagnetic Noise Absorber Technology
Thin and flexible materials can provide simple and innovative solutions for hardware engineers Jung-Ju Suh, Ph.D. Electrical Markets Division, 3M Korea; Seoul, South Korea INTRODUCTION Electromagnetic interference issues can arise anywhere in electronic equipment with unpredictable and troublesome effects. These issues challenge hardware design engineers, and the … [Read more...]
Recent Improvements on Dual-Ridged Horn Antennas
Improved gain and pattern behavior of these horns makes them ideal for use in other applications outside of EMC. Vicente Rodriguez ETS-Lindgren, Cedar Park, TX, USA For over 40 years dual-ridged horn antennas have been the most common broadband horn used in EMC applications. These antennas are common in the EMC community in their 200-MHz to 2-GHz version and the 1-GHz to … [Read more...]
ISO/IEC 17025: General requirements for the competence of testing and calibration laboratories—a comparison of the First and Second editions
Use of the new international laboratory standard should assure greater consistency between laboratories, testing and calibration DANIEL D. HOOLIHAN THE FIRST EDITION of ISO/IEC 17025 was released in 1999 and the Second Edition was released in 2005. Both editions of 17025 rely heavily on an earlier version of a similar international document; ISO/IEC Guide 25:1990 – General … [Read more...]
