Multi-tap bus communication for modular power converters with distributed isolation

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 6Sprache: EnglischTyp: PDF

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Angerer, Martin; Amler, Adrian; Maerz, Martin (Friedrich-Alexander-Universität Erlangen-Nürnberg, Institute of Energy Electronics, Germany)
Ruccius, Benjamin (Fraunhofer IISB, Germany)

A centralized communication system is state-of-the-art in modular power converters. Modular communication topologies, e.g. a ring, have an increased latency. This paper analyzes the DC-pole fault scenario in terms of delayed communication. We propose a multi-tap bus that virtually eliminates the latency for switching commands. The bus features a distributed isolation system based on digital isolator ICs. Each isolator must be rated only for the potential difference of two adjacent converter modules. The theoretical results are supported by a communication system demonstrator, to verify the physical layer and shared medium access functionality.