Design and validation of a simulation methodology for the virtual evaluation of magnetic fields on component level

This presentation is about the virtual assessment of magnetic fields in the frequency range from 9kHz to 30MHz according to the GBT18387 guideline. In the first step, it is shown how the 60cm frame antenna, which is used for the measurements, is simulated. The test environment (table, anechoic chamber) is then modeled and the model is validated for a simple wire structure using measurements. The consideration of the bandwidth jump in the measuring receiver also plays a role here.

Presenter: Marcel MESSER, Audi AG

CST 2023 Recent Enhancement on EMC Simulation

The CST 2023 release version comes with several number exciting new feature enhacements for EMC simulation. In this version, it is now possible to plot common EMC limit lines standard as well as plotting the user defined limit. The EMI receiver post processing provides simulation result to be as close aspossible with measurement equipment. In addition to this, we added several new realisitic and representative examples in our component library, which can help not only new user, but also experience user to setup/build-up their emc simulation model. A new workflow to calculate the shielding effectiveness results using template based post processing has been introduced. An automatic component placement in the schematic from EDA import data is now possible (starting from SP2) and the complex 3D cable model can be now automatically generated from Cable Studio. And we have many more EMC-related features available in 2023 version. Last but not least, many of these new features can be easily accessed through a new dedicated "EMC workflow" button.

Presenter: Richard SJIARIEL, Dassault Systèmes

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Conducted emission simulation on complex steering system

This presentation is about how to perform conducted emission simulations on a complex steering system in the MW band using CST Microwave Studio and Design Studio. The basic modeling techniques, solver settings and the possible errors/mistakes are described. Co-simulation example is also presented. The simulation model includes three-phase bridges using MOSFETS and EMI filter elements.

Presenter: Dávid SZERENCSÉS, thyssenkrupp Components technology Hungary Kft.

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Electrostatic Particle-In-Cell Simulation for Analysis of Initiation of Insulator Surface Flashover in Vacuum

The dielectric strength of vacuum interrupters can be limited by vacuum breakdown or/and breakdown along insulators. The initiation of breakdown along insulator was investigated by means of particle traking and electrostatic particle-in-cell simulations of a test geometry with a cylindrical alumina insulator. As a starting process, the electric field-induced electron emission from copper vapor shield described by the Fowler-Nordheim equation was considered. Further propagation of the electron avalance was modeled by electron impact-induced secondary electron emission from the insulator surface. The electric field produced by negative charges either from the insulator surface or from the space charge from electrons remaining close to emitter limited the emission current. The influence of the emitter surface quality on the field emission was investigated by varying the field enhancement factor between 60 and 100.

Presenter: Svetlana GOSSMANN, Siemens AG

Macromodeling for EMC Simulation

In the past decade, Macromodeling based on the well-known Vector Fitting has emerged as the preferred technique to generate passive and causal models from discrete, band-limited frequency domain data represented in form of S-parameters. These models can be used in any circuit simulation environment, such as SPICE, for reliable transient and AC analyses. In this talk, we present the application of vector fitting to EMC simulations of power electronics and explain the steps performed during the macromodel generation process in order to help EMC engineers to generate accurate macromodels for switched system simulations.

Presenter: Andreas BARCHANSKI, Dassault Systèmes

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Modeling and validation of a vibrating intrinsic reverberation chamber for immunity testing on vehicle level

In the scope of electrification and digitalization in the automotive sector and thereby following the increase in the electronic components, the EMC development will face a whole new face of a challenge. In this scenario, both the interference emission and immunity measurements are done on the component and the vehicle. For such tests, different test environments have been established such as anechoic chambers, electromagnetic reverberation chambers and vibrating intrinsic reverberation chambers. A vibrating intrinsic reverberation chamber from AUDI AG has been modeled and simulated in CST Studio Suite.

Initially the stacked logarithmic periodic broadband antenna and double ridged waveguide horn broadband antenna are modeled and simulated. In regard of the hybrid simulation, both the antenna models and field sources were validated. For the optimal modeling, the vibrating intrinsic reverberation chamber was simulated in the passive state. The influence of the material modeling and the near field coupling is shown here. Then after the vibrating intrinsic reverberation chamber was modeled in the stationary and the steady state and examine in terms of the number of iterations, antenna position and its conductivity. The optimized model is presented.

Presenter: Timo KAISER

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