Okay, so if you look at the power supply as a product, you put it in the environment. This is where you connect your converter to. supports HTML5 video, This course can also be taken for academic credit as ECEA 5707, part of CU Boulder’s Master of Science in Electrical Engineering degree. It is in the operation of that switching power converter is producing radiated emission. The goal of the course is to provide a basic understanding of the physics involved in making the measurement so that EMC test and design engineers can make better, more meaningful and more … Part A provides the learners with basic concepts of EMC, source of EMI, coupling mechanisms, key parameters of EMC, near field, far field, common EMC units, real world components, EMC techniques in product design and troubleshooting. And in that setup, we will be adding an input filter on the input side of the converter. The course is intended for both the practicing professionals and the new engineers entering the field. It aims to provide project managers and others working on railway projects with an understanding of the importance of EMC. And this is where the measurement device is connected in order to find out how large these noise levels really are. You will be able to design properly damped single and multi-section filters to meet the conducted EMI attenuation requirements without compromising frequency responses or stability of closed-loop controlled power converters. We strongly recommend students complete the CU Boulder Power Electronics specialization as well as Courses #1 (Averaged-Switch Modeling and Simulation) and #2 (Techniques of Design-Oriented Analysis) before enrolling in this course (the course numbers provided below are for students in the CU Boulder's MS-EE program): So how does the addition of an input filter affect performance of the closed-loop converter? Online EMC Courses & Consulting LearnEMC helps companies build the in-house expertise they need to ensure their products will meet electromagnetic compatibility requirements. DraganPoljak, "Advanced Modeling in Computational Electromagnetic Compatibility”, John Wiley &Sons. This is really the input filter that we will be referring to in the input filter design part of the class. Electromagnetic Compatibility-Hebrew. And it's related to how we actually verify whether our system is complying to the EMI requirements or not. You can see that we are talking about requirements that are subject to regulations. And on the vertical axis, we have the measured level of noise in dB microvolts. ● Use computer-aided tools and simulations to verify input filter design. This course stresses the fundamental concepts and tools that electronics engineers can employ to avoid electromagnetic compatibility and signal integrity problems. And let's say in the average mode, you get something like this. That, by the way, is the range of frequencies where we typically have switching frequency of the switching converter. Edward Drocella. This is Course #3 in the Modeling and Control of Power Electronics course sequence. And so we refer to those filters on the input side as EMI, electromagnetic interference filters. This two-hour course is divided into 2 parts, Part A “EMC Basics” and Part B “Common EMC Tests”. Electromagnetic Compatibility Engineering is a complete rewrite and expansion of Henry Ott's best selling book Noise Reduction Techniques in Electronic Systems, 2nd Edition. ● Design properly damped multi-stage input filters. Topics include: signal spectra, inductive and capacitive coupling, common-impedance coupling, non-ideal circuit components, EMC filters, common-mode and differential-mode currents, electromagnetic wave shielding, EMC regulations and testing, radiated and conducted emissions … One is, how do we actually design this rectifier in the first place? Here is an example for that European Norm Class B limits. Search courses Go. After completion of this course, you will gain an understanding of issues related to electromagnetic interference (EMI) and electromagnetic compatibility (EMC), the need for input filters and the effects input filters may have on converter responses. So you see, this is the frequency axis on the horizontal axis. These course notes are used in the EMC course taught at Michigan State University, ECE 407: Electromagnetic Compatibility. The issues addressed evolved and now cover a larger frequency range from DC upto the 6 GHz level discussing new problems and matching solutions. The participants can use their own products as test vehicles during the workshop. One is, why are we doing this? East Lansing, MI 48824MSU is an affirmative-action, equal-opportunity employer. And then the second, once we understand that there are many situations where we have no choice but to add the input filter, we would like to see, what is the effect of that input filter on the closed-loop performance of the converter that we have already designed. And we want to make sure that those spikes are below what is actually allowed. ● Understand input filter design principles based on attenuation requirements and impedance interactions. So this last point right here is 30MHz. Electromagnetic Compatibility. Input filter design. So electromagnetic susceptibility is the ability to function satisfactorily in the electromagnetic environment that's surrounding the system itself. Now there are some elements to this that we haven't really talked about at all so far. We aren't going to go to that in any level of detail. ● Design properly damped single-stage input filters. Tech. After completing this course, you will be able to: And there are really two top-level questions to address here. The regulation starts typically from 150kHz. Modeling and Control of Power Electronics Specialization, Construction Engineering and Management Certificate, Machine Learning for Analytics Certificate, Innovation Management & Entrepreneurship Certificate, Sustainabaility and Development Certificate, Spatial Data Analysis and Visualization Certificate, Master's of Innovation & Entrepreneurship. And so the noise from the converter, this would be the input current of the converter, is diverted into this path right here. Without any overriding regulations outside of the companies involved in producing these products, you'd have a chaotic electromagnetic environment where nothing would work perfectly. Regulatory bodies around the world have placed limits on the levels of … Electromagnetic compatibility (EMC) is the ability of different electronic devices and components to work correctly even in the presence of other devices that emit electromagnetic waves. So you will see that the purpose really of placing the input filter in the design of a switching power supply is to deal with conducted emissions. It measures the noise in frequency domain and checks where that noise generated by the switching converter attached to the LISN is larger or smaller than the prescribed limit. Electromagnetic compatibility (EMC) problems can significantly decrease the reliability, increase the cost, and delay the development schedules of modern electronic systems. Under support from the National Science Foundation GOALI program, the EM research group at Michigan State University has written a set of course notes on Electromagnetic Compatibility (EMC). in Electrical and Electronics Engineering program at School of Engineering, Amrita Vishwa Vidyapeetham The LISN is a standardize device. The series inductors here are providing high impedance with respect to the AC line. Information about this course from the Registrar's Office can be found here [Link]. Click to enter this course… This course introduces the main principles of Electromagnetic Compatibility (EMC) within the railway context. The Physics of Electromagnetic Compatibility Measurements. These course notes are used in the EMC course taught at Michigan State University, ECE 407: Electromagnetic Compatibility. One that is very commonly applied worldwide, but is European in origin is this Euro-Norm 55022. So we'll be looking into the setup where we have our switching converter, operating close loop, regulating, for example, output voltage. The Physics of Electromagnetic Compatibility Measurements (6 hours) This course reviews the equipment, test set-up and primary coupling mechanisms associated with each of the major EMC tests. About the Course. Electromagnetic compatibility, or EMC means that a device is compatible with (i.e., no interference is caused by) its electromagnetic (EM) environment … So the input filter design refers to the situation where an input filter is added on the input side of the converter. Electromagnetic principles - Faraday's and Ampere's equations: Download: 4: Electromagnetic principles - Gauss's equation, boundary conditions: Download: 5: Electromagnetic principles - Uniform plane wave: Download: 6: Electromagnetic principles - Transmission lines: Download: 7: Electromagnetic principles - Dipoles: Download: 8 The Electromagnetic Compatibility Certificate Program requires the successful completion of any two of the following four courses. Electromagnetics Research GroupMichigan State UniversityCollege of Engineering428 S. Shaw LaneEast Lansing, MI 48824-1226, Accessibility StatementDECS Privacy Statement, Developed by DECS | EGR | MSU | Contact Us | Privacy Statement This is Course #3 in the Modeling and Control of Power Electronics course sequence. These course notes are available to download below. Now a little bit about this LISN block. They're called quasi-peak and average. And the one particular version of that LISN is shown right here. emctesting.org is an online platform for businesses and individuals who are interested in Electromagnetic Compatibility (EMC) testing. AN INTRODUCTION TO ELECTROMAGNETIC COMPATIBILITY (EMC) PRESENTED BY DR. WILLIAM G. DUFF Applied Technology Institute 349 Berkshire Drive Riva, Maryland 21140 These values inside are not arbitrary. ● Converter Control (ECEA 5702) It refers generally to the ability of the device, such as a power supply, to function in a proper manner, satisfactorily, in an electromagnetic environment that may have other components or systems present. So see this gives the maximum value of noise for any given frequency in the spectrum. Just note that we have a switching power converter through a rectifier connected to, ultimately, the AC line source on the input side. This is the grid side aiming between the grid and the device under test or your system under test, you connect that LISN box. Electromagnetic compatibility Anechoic RF chamber used for EMC testing (radiated emissions and immunity) Electromagnetic compatibility (EMC) is the branch of electrical sciences which stud-ies the unintentional generation, propagation and reception of electromagnetic energy with reference to the unwanted effects (Electro-magnetic interference, or EMI) that such en-ergy may induce. And then second, in the process of switching, we will be producing all kinds of conducted noise, in particular, conducted noise on the input terminals of the device or the system. The primary chamber is designed to accommodate larger pieces of equipment. And that LISN box has standardized impedances, the purpose of which is to standardize the way the noise is measured. And this why we are going to likely have the spikes in the spectrum that we measure right there. Hundreds of kilohertz are fairly commonly done, and that makes it potentially difficult to meet those regulations. Because you have currents flowing through the loops in the converter. You simply cannot market a product without being able to meet those regulations. So here is a diagram that shows a typical power supply that's connected to an AC line source. What our customers are saying I attended EMC and Low Voltage Directive courses. And those input terminal conducted emissions are regulated, or are have to be constrained in two different ways. This course covers the electromagnetics for electrical systems, signals and spectra, regulations, radiated and conducted emissions, conducted and radiated immunity, and mitigation techniques. It's coming from the fact that you have to obey certain rules, right, if you want to have a product that is then used in the real world. Continuing Education Credits: 1.2 CEUs, 12 PDHs Because in the presence of the switching noise generated by the converter, meeting those regulations inevitably is going to require some amount of EMI filtering on the input side. ● Converter Circuits (ECEA 5701) Electromagnetic Compatibility. To view this video please enable JavaScript, and consider upgrading to a web browser that ● Techniques of Design-Oriented Analysis (ECEA 5706) Students completing the course will be able to make good decisions regarding board layout and system design for EMC. Plus, even if your switching frequency is less than 150kHz, you're not automatically guaranteed to meet these regulations because of harmonics. This course reviews the equipment, test set-ups and primary coupling mechanisms associated with each of the major electromagnetic compatibility tests. The facility has two shielded enclosures, or chambers, as shown in the accompanying figures. Electromagnetic Compatibility (EMC) Course Notes. So the low limit right here is 150kHz, and they extend up to 30MHz. Again, we won't spend time on the details of how exactly these setups are done for the the spectrum analyzer. LISN stands for Line Impedance Stabilization Network. And I'll explain what that is in just a second. To give you some background of why we need to add the input filter, we need to do a little bit of a review of what is called electromagnetic compatibility. So we are basically connecting the device that allows us to measure the noise levels across these two resistors that are called RN. That particular aspect is referred to as susceptibility. It's measured as voltage across the RN resistance with the spectrum analyzer in two different setups of that spectrum analyzer. Where is that noise measured? But the measurement bandwidth that is used in the process is 9kHz. After completion of this course, you will gain an understanding of issues related to electromagnetic interference (EMI) and electromagnetic compatibility (EMC), the need for input filters and the effects input filters may have on converter responses. ● Introduction to Power Electronics (ECEA 5700) And then there is a device that's called the LISN. They are decided so that the measured noise is done always in exactly the same manner. And meeting those regulations can be actually quite tough. These terminals right here are terminals for the device under test is connected. One is in terms of what is called harmonics, the harmonics of the input current. EMC Principles 3rd Edition (17, video-recorded lectures varying between 1 and 2.5 hours by Dr. Daryl Beetner) Electromagnetic Compatibility (EMC) in-person training, covering regulatory compliance, essential introductions, in-depth fundamentals and advanced knowledge based courses. Electromagnetic compatibility (EMC) is the ability of electrical equipment and systems to function acceptably in their electromagnetic environment, by limiting the unintentional generation, propagation and reception of electromagnetic energy which may cause unwanted effects such as electromagnetic interference (EMI) or even physical damage in operational equipment. And we'll refer to those when we get to discussion of the electrifier part of the system. This two-day hands-on course presents the fundamental principles of electromagnetic compatibility. Click to enter this course. Going from there, you have the AC rectifier connected on the front side. This is your design right here. Introductory course on electromagnetic emission and susceptibility in products and systems: problems, analysis methods, measures. It's supplying loads on one side and it's tied to the AC grid on the other side. National Telecommunications and Information Administration. And then the other one is limiting the emissions of that system with respect to the environment in the radiated or conducted form. This course is designed to teach the fundamentals of EMC. Different parts of the world have different regulations. About this course Electromagnetic compatibility (EMC) is the science behind building electronic products which do not cause electromagnetic interference and which are not susceptible to electromagnetic interference from other devices. The other one that actually will be the one that we are more concerned with, with respect to the input filter design, relates to the unit itself creating electromagnetic interference to the environment in two different forms. Course Objectives. So the purpose of the LISN element, and you see that is actually LISN that's connected right here between the AC line source and the input side of the converters. 3. Course categories: Electromagnetic Compatibility. © 2021 Coursera Inc. All rights reserved. Where is this really coming from? © Michigan State University Board of Trustees. And you say, all right, good, this device is actually meeting that particular regulation. Office of Spectrum Management. What is the purpose of the input filter to start with? Both were extremely well delivered in a very effective format, from who are clearly experts. And there is radiation associated with these loops serving as unintended antennas with respect to the environment. 1. “Electromagnetic Interference and Compatibility”, IMPACT series, IIT-Delhi, Modules1-9. And on the left-hand side, you have two terminals where you connect to the AC line. One is called the EMI filter. Fundamentals of Performing Electromagnetic Compatibility Analysis USTTI Spectrum Management Course September 2019. But just to be aware of the fact that these regulations do exist and are actually very, very important parts of the design. And you see in that chain from the AC line source, we have two components that I'd like to talk a little bit about. How do these limits in fact look like? So that's one branch of the electromagnetic compatibility. Visit msu.edu, Module 2: Fundamental Behavior of Electrical Systems, Module 4: General Formulation of Electric Circuit Theory, Module 5: Non-Ideal Behavior of Circuit Components, Module 7: AM, FM, and the Spectrum Analyzer, Module 11 - 12: Conducted Emissions and Immunity, Module 13: Network Analysis and Directional Couplers, Finding a Home in a Land of Green: The Story of Dr. Kun-Mu Chen and Michigan State University, Projects: Computational Electromagnetics Overview, Material Measurement and Characterization, Electromagnetic Compatibility (EMC) Course Notes, Electrosciences at Michigan State Brochure. So the measurement device operates as a spectrum analyzer. 2. 202-482-2608. edrocella@ntia.gov Gainful Employment Disclosure for the Certificate in Applied Electromagnetics A detailed outline for each course is available through the links provided. Three courses required for completion. So you're basically sweeping a bandwidth of 9kHz across frequencies, and you're finding out what your level of noise is. Design Part of the major electromagnetic Compatibility ( EMC ) of electronic systems to... Sweeping a bandwidth of 9kHz across frequencies, and that 's the one that in! Courses and/or working directly with a company’s engineers to design a product guaranteed to meet these do... Product guaranteed to meet all EMC requirements larger frequency range from DC upto the 6 GHz discussing... The environment constrained in two different setups of that switching power converter is producing radiated emission electromagnetic. 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