Field Bus for Data Exchange and Control of Modular Power Electronic Systems with High Synchronisation Accuracy

In this paper, a new field bus protocol based on the IEEE 802.3 Ethernet standard is proposed. It enables fast data exchange between and synchronised control in the modules of modular power electronic systems. With increasing switching frequency, a highly accurate synchronisation of the different modules is a necessary requirement for a control bus. The proposed field bus protocol provides a stable and efficient scheme including a novel data frame structure and allows a synchronisation accuracy of ±4 ns on the 1 GBit Ethernet standard.For validation of the new protocol a prototype system has been built and measurement results are provided. Eventually, the implementation has been found to meet the specification during testing.