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Interference Technology

For EMI / EMC Engineers

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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...]

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...]

Company Adds Authorized HFES Reseller

 

Zero Ground announced recently that Las Vegas, Nev-based Dynamic Commissioning Solutions, Inc. (DCSi) has been added as an Authorized Reseller for the Zero Ground High Frequency Extraction System (HFES). As a professional building commissioning firm, DCSi systematically evaluates building equipment, subsystems, operation and maintenance procedures, and the performance of all … [Read more...]

Choosing the Right Chamber for Your Test Requirements

 

Martin Wiles, Vince Rodriguez, ETS-Lindgren Developments within standards community has led to new chamber validation procedures above 1 GHz and alternative test methods using FARs. INTRODUCTION Anechoic chambers are used today for performing EMC measurements according to a variety of published EMC standards. There are many different fields of application, including … [Read more...]

Egregious Errors in Electromagnetic Radiation Evaluation

 

Reasons for widely differing results in commercial radiated emission measurements. MIL-STD-461 RADIATED EMISSION MEASUREMENTS In 1967, the first version of MIL-STD-461 was introduced. Radiated emission measurements were allowed outside of a shielded room but due to the low levels of radiated emission limits, compared to an average ambient, measurements were invariably made … [Read more...]

Proper EMI Suppression for Controlling Automotive Electronic Emissions

 

As technology advances, the need to place larger numbers of electrical and electronic systems into automobiles has dramatically increased, and although these systems may be small, it does not necessarily mean their electromagnetic emissions are, too. An article in Automotive DesignLine discusses the various electronic systems found on automobiles, and addresses the need of … [Read more...]

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