Very Efficient Current Observer for Σ Δ Modulation based Current Transducers for High Bandwidth Current Control

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: 8Sprache: EnglischTyp: PDF

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Krah, Jens Onno; Fitz, Eduard (TH Köln, Germany)
Maeder, Pascal (LEM International SA, Geneva, Switzerland)

Instead of analog current transducers in combination with successive-approximation analog-to-digital converters σ-δ technology jointly with digital decimation filter technology is increasingly used. The article describes a new technique how the bit-stream can be formed into a quasi-time-continuous measured value in a very efficient way and similar to a classical observer structure. The laboratory test results are based on an FPGA implementation.