Galvanically isolated differential data transmission using capacitive coupling and a modified Manchester algorithm for smart power converters

Titelangaben

Niedermeier, M. T. ; Wenger, Martin M. ; Filimon, R. ; Sedlacek, V. O. ; Lorentz, Vincent ; Fort, C. ; März, M. ; Ferrieux, J.-P. ; Frey, L.:
Galvanically isolated differential data transmission using capacitive coupling and a modified Manchester algorithm for smart power converters.
2014
Veranstaltung: 2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE) , Jun. 1–4, 2014 , Istanbul, Turkey.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Vortrag mit Paper )
DOI: https://doi.org/10.1109/ISIE.2014.6865029

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Abstract

In this paper, a method for encoding and decoding digital data signals using a modified form of the standard Manchester code for the application in galvanically isolated data transmission in smart power electronics is described. The method includes a modified encoder circuit and a matching decoder circuit that is able to rebuild the original clock and data signal without a separate transmission of the clock signal. A capacitive coupling element with a corresponding signal conditioning circuit was placed between the encoder and decoder circuit to achieve a galvanic isolation between the primary side that processes the data signals and the secondary side that is responsible for the processing of power in smart power devices. After a description of basic principles of the transmission of data over a galvanic isolation and the state-of-the-art of Manchester code based data transmission, the encoding and decoding process of the modified Manchester code is elaborated and experimental results are presented.