The use of . solar panel systems is rapidly increasing and some of these systems are co-located in the vicinity of wireless systems. Measurements have shown that the radiated emission from solar panel electronics can reach considerable levels, in some cases even above CISPR 22 Class B. Here, examples of interference impact is discussed for two examples of wireless applications, air traffic control communications (ATCC) and High-Frequency (HF) communications. The overall conclusion is that co-location of solar panel systems with wireless communications, must be carefully analyzed not to create interference problems.
given in Figure 1 . This article is a part of a series of texts that will deal with the EMC challenge in terms of project management and the practical EMC activities at different stages in the project flow.
Different companies all have their own way of describing their project flow, so to keep it simple we will use the labels as given in Figure 1. We can call it a generic project flow. The picture only describes the basic outline of the work packages. These articles will describe the actual practical work we want to do in the project to “make EMC work” in a time- and cost-efficient way. Each part of our series will fill in the details for each part piece by piece.
This is the 5th part – Detail EMC design – in our process picture.
När nya tekniker/produkter . börjar användas i större skala så innebär det ibland att man upptäcker att de samtidigt bidrar till en ökad mängd elektromagnetiska störningar. När så är fallet så brukar det efterhand innebära att olika åtgärder för att antingen begränsa störningsmängden i sig eller att anpassa användningen så att konsekvenserna av störningarna minimeras.
Preamble: . As for any organized EMI control, ESD protection consist in anticipating or correcting the unwanted effects of an hostile electromagnetic ambient. Like many EMI threats, ESD manifests through conducted and radiated phenomena, with the latest being often the dominant mode. But there is a unique aspect to ESD, not found in common radiated EMI episodes where the victim box and cables are illuminated by a uniform field. Instead, ESD generates locally a strong field pulse, typically > 1kV/m near the discharge point, dropping quickly as one move away. Therefore, although ESD hardening should be part of a general EMI control, not handled as a separate constraint, some classical EMC solutions may not be sufficient and should be complemented by additional protections.
System EMC Design . This article is a part of a series of texts that will deal with the EMC challenge in terms of project management and the practical EMC activities at different stages in the project flow. Different companies all have their own way of describing their project flow, so to keep it simple we will use the labels as given in Figure 1. We can call it a generic project flow. The picture only describes the basic outline of the work packages. These articles will describe the actual practical work we want to do in the project to “make EMC work” in a time- and cost-efficient way. Each part of our series will fill in the details for each part piece by piece.
EMC-området . kan spåras tillbaka till 1800-talet då man upptäckte att åskväder och blixtnedslag kunde påverka komponenter i kraftledningsnät. Här uppstod därmed ett EMC-problem som orsakades av ett naturfenomen som källa. De första EMC-incidenterna som orsakades av en källa från mänsklig aktivitet kom i slutet av 1800-talet. För 120 år sedan rapporterades för första gången vad vi idag kallar en EMC-incident, och då var det US Navy som börjat använda trådlös telegrafi.
Michel Mardiguian . has for many years been an internationally recognized writer and lecturer. Michel’s popular series of EMC-articles in Electronic Environment has also been published on the magazine’s international website with readers from all over the world. Michel Mardiguian has now compiled the large number of articles and course material, for a comprehensive handbook.
An article in Electronic Environment . 2017/2, is about the fundamental failure mechanisms (capacitive, inductive coupling and frame voltage) that cause EDM (Electric Discharge Machining aka Bearing Currents or Electric Erosion) in bearings. This article expands on the theme and shows why “The Simple Explanation”, The Mathematical Models and the Real World view on EDM differ, both in nature and in practical use. It also adds a couple of new insights that are becoming more and more valid with the widespread use of Frequency Inverters and loads with higher-than-normal capacitance to ground.
Abstract — . The technical development towards the full vision of the Internet of Things (ioT) is expected to reach it´s full potential by the coming 5G wireless technologies. This will open up for so called massive IoT characterized by co-location densities in the order of 200000 devices per km2. This development will affect the area of Electromagnetic Compatibility (EMC) in a number of ways and may even be the most challenging issue for the EMC area since it was born for over 100 years ago. In this paper, some of these new challenges are highlighted and discussed. Furthermore, numerical results from some dense co-location scenarios are presented to show examples of interference challenges to be handled.
Electrostatic Discharge (ESD) . is a very common, yet often overlooked problem that can plague electronic equipments in a mysterious way. ESD is like an invisible, mischievous gremlin that come and go un-noticed, until the related failures or malfunctions become apparent. Yet, ESD by its elusive but superfast characteristics and very high frequency spectrum definitely belong to the EMI family. Once understood, the solutions to it are not very different than those for the more classical interference problems, bearing in mind that we will be dealing with a frequency domain up to the GHz, where some EMI solutions are simply not appropriate.