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• W3033228575 abstract "Chapter 5 Modeling of Conducted Emission in ASD First published: 31 May 2018 https://doi.org/10.1002/9781119388975.ch5 AboutPDFPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShareShare a linkShare onFacebookTwitterLinked InRedditWechat Abstract The primary objective of computational modeling of applications with power electronics converters is to obtain as many functionally essential characteristics of evaluated construction as possible without the necessity to build a prototype. Designing processes of power electronics converters are usually preceded by in-depth simulation analysis of fundamental behavior which allows to predict most of the significant issues related to fundamental behavior before building physical model, but very rarely allow to solve problems related to EMC performance entirely effectively. In commonly used design process of ASD applications conducted emission issues are usually addressed after systems installation. Adding extra components for limiting conducted emission at this stage, very often significantly affects costs and completion time, or even requires redesigning of entire system. Therefore methodologies that allow to predict the EMC problems as early as possible are developed very extensively. Effectiveness of currently available simulation tools used for power electronics converters design is systematically increasing and nowadays is quite satisfactory for assessing fundamental functionalities of converters related to the used modulation methodologies. Nevertheless, detailed analysis of transistor's and diodes commutation processes usually require consideration of parameters of parasitic couplings existing internally in power electronic components and also resulting from externally connected sub-components of ASDs, that significantly limit reliability of obtained results. Commonly, even in regular analysis of power electronic converters, extension of frequency bandwidth above few hundreds of kHz results in significant increase of influence of parasitic couplings, that cannot be omitted. Analysis of EMC behavior of FC extends model complexity excessively because it requires taking capacitive couplings to ground into account which are essential for conducted emission phenomena analysis. Parasitic couplings between energized and grounded components of converters are omnipresent, numerous and distributed in all sub-components, including non-electrical conducting construction. Complexity of analysis of conducted emission in ASDs is even higher, because ASDs in addition to FCs, include external and usually significantly changeable loads. The motor as a converter load is a relatively bulky component with long windings wires and grounded stator placed closely to each other, thus resulting in strong capacitive couplings to ground. The motor feeding cable is often of a considerable length with relation to the converter and motor dimensions and can be variantly placed in relation to other cabling - especially grounded cable trays. Therefore a kind of the motor cable, cable shielding if exists and cable arrangement in particular application can influence significantly the overall EMC performance of the whole ASD application. Modeling of EMC behavior of an ASD as the whole system, consisting of a FC, an AC motor, the motor feeding cable and optionally EMI filtering components, requires knowledge of broadband characteristics of all sub-components. Most of technical specifications of commonly used ASDs sub-components currently provided by manufactures primarily do not include wide-band specifications that are detailed enough for simulation analysis, even necessary within the conducted emission frequency range. Therefore modeling of EMC requires to determine missing parameters that describe broadband behavior of all sub-components. Identification of all those missing parameters can be carried out in two ways: by measurement with the use of external terminals only or with intrusion into the inside of components. Both of the methods are problematic. Terminal based approach is much easier to run experimentally but allows to acquire only strongly limited information about internal structures of identified components. On the other hand, access to internal parts of identified components is much more elaborate and hazardous for tested devices, thus not always possible, however it can be very significant for effectiveness of model simplification. Summarizing, EMC analysis of ASDs is much more extensive, complex and challenging compared to the FC as one of the ASD component. Detailed investigation of the influence of all parasitic couplings existing in ASD leads to enormous expansion of model complexity, thus consequently greatly increases computational overhead and efforts necessary for identification process of numerous parameters of such models. The use of very extensive models usually also rises uncertainty about the accuracy of obtained results, therefore reasonable optimization and simplification of models is one the most expected outcomes of current developments in EMC analysis. In spite of many difficulties modeling simulation study of conducted emission in ASDs is increasingly intensively developed over the last years. In a number of published papers new methodologies for precise and successful solving of particular EMC issues occurring in contemporary applications of ASDs have been reported. Nevertheless maintaining reasonable balance between model complexity and its effectiveness is still the greatest challenge in current research areas related to EMC. High Frequency Conducted Emission in AC Motor Drives Fed By Frequency Converters: Sources and Propagation Paths RelatedInformation" @default.
• W3033228575 created "2020-06-12" @default.
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• W3033228575 date "2018-05-31" @default.
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• W3033228575 title "Modeling of Conducted Emission in ASD" @default.
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