Simulationsgestützte Planung und Auslegung hybrider AC/DCEnergienetze für Produktionssysteme: ein ganzheitlicher Ansatz

This paper proposes a simulation-based planning concept and a simulation architecture for the design of hybrid AC/DC grids, which have the potential to significantly contribute to the energy transition. The paper discusses the lack of knowledge in the market for the design of these grids, and presents a simulation approach to efficiently assemble hybrid networks and analyse them based on an electrical simulation. The authors also address the need to include process-specific characteristics in the planning and analysis of the electrical network, which is why common simulation tools for production processes are included in the approach. This allows economic, ecological, safety-relevant and technical aspects to be integrated into the planning process. The proposed concept is further discussed and planned for validation on the basis of a demonstrator currently under construction

Aktiver Filter zur Filterung von Gleichtaktstörungen

Die Erfindung betrifft einen aktiven Filter (1) zur Unterdrückung von Gleichtaktstörungen in einer zweipoligen Übertragungsleitung (3) für Differenzsignale, wobei der aktive Filter (1) galvanisch mit den beiden Übertragungsleitungen (31, 32) verbunden ist.Um einen einfach aufgebauten Filter zu schaffen der kostengünstig herstellbar ist wird vorgeschlagen, dass zwei parallel geschaltete Stromspiegel (21, 22) jeweils zwischen der positiven Übertragungsleitung (31) und der negativen Übertragungsleitung (32) geschaltet sind, wobei jeder dieser beiden Stromspiegel einen niederimpedanten Ableitpfad für entweder positive oder negative Gleichtaktstörungen bildet

Active common-mode filter for capacitive-coupled isolated signalling

Capacitive coupling is a well-established principle in isolated signalling. A major challenge esp. in power electronics is common-mode transient immunity caused by the displacement currents at the coupling capacitors. Digital isolator integrated circuits (ICs) employ modulated signalling, the authors propose an active filter circuit to remove common-mode components from baseband signals. This allows for reliable data transmission during transients in power semiconductor control, AC-coupled RS-485 or transformer-less Ethernet. The filter structure is simple and consists of two current mirrors, one for positive transients, and one for the negative. A current on one differential signal line is `mirrored' onto the other, common-mode currents are conducted to ground. Differential signals are minimally affected. The proposed filter is verified in simulation and experiment: baseband signalling with 50 Mbps in presence of 30 kV/ μs burst transients is achieved using discrete semiconductors. Even better results are expected when monolithically embedding the filter in an integrated circuit