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

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

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 c...

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Bibliographic Details
Published in:2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE) pp. 2596 - 2600
Main Authors: Niedermeier, M. T., Wenger, M. M., Filimon, R., Sedlacek, V. O., Lorentz, V. R. H., Fort, C., Marz, M., Ferrieux, J-P, Frey, L.
Format: Conference Proceeding
Language:English
Published: IEEE 01-06-2014
Subjects:
battery systems
capacitive coupling
Clocks
Couplings
Data communication
Decoding
Encoding
galvanic isolation
harsh environment
Manchester code
power electronics
robust data transmission
signal conditioning
Synchronization
Topology
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Description
Summary: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.
ISSN:2163-5137
DOI:10.1109/ISIE.2014.6865029