Godkända
Switch för förbikoppling av Ethernet-enheter
Sergio Benages Montolio (2016) och Lais Goncalves Rau (2016)
Start
2017-12-15
Presentation
2018-06-07 11:15
Plats:
E:2349
Avslutat:
2019-03-26
Examensrapport:
Sammanfattning
Ethernet is one of the most widely used forms of communication protocols in the field of automation, being the most successful LAN technology in history. When a large number of devices need to be connected to a network, they are divided in branches. The devices in each branch are connected to an Ethernet switch using a wire for each of them forming a star topology. This configuration requires an extensive use of wiring. In order to reduce this amount, the devices in each branch could be connected in series, which is called bus topology. However, this configuration has a limitation. When one of the units fails, the communication in the whole branch is compromised. There are three approaches currently on the market in order to solve the communication cut. One of the options is to use relays between the two Ethernet wires going in and out of the units. Although it is a practical solution, it is not area effective in addition to being expensive. Another solution would be to use a ring topology, which provides an extra communication path but also requires extra wire lines and an advanced switch to control the direction of the communication flow. Finally, there is the star topology, mentioned previously. This project will investigate another solution to the matter in the form of an ASIC while keeping the bus topology. The main goal of this Master thesis is to prove the concept of a possible solution to cope with the problem mentioned previously. It will consist on a solid state Ethernet bypass switch that will be powered by harvesting energy from the Ethernet cable. The device will act as a closed switch in case of a power failure of one of the composing units of the system. Therefore, in addition to the design of the solid state switch itself, a solution for harvesting energy from the Ethernet communication will be investigated and designed.
Handledare: Mats Karlsson (Schneider Electric) och Thomas Nordwall (Schneider Electric) och Frredrik Göth (Schneider Electric) och Henrik Sjöland (EIT)
Examinator: Pietro Andreani (EIT)