Analyses of EMC- & Grid-connected Filters in an Electric Power-train

Abstract

Abstract Epiroc have had a need to investigate the EMC and LCL-filters that are currently placed and operating in a lot of their vehicles. They have questioned whether or not their currently used capacitor and inductor-based filters are working adequately in filtering unwanted noise or if there could be a risk of wear to the system with prolonged operation and if any improvements could be made. This thesis has, with the help of Epiroc and extensive research, examined these questions in detail by conducting measurements on a drill rig vehicle at Epiroc’s facilities in Örebro. The thesis dives into areas such as Electromagnetic interference, electrical noise prevention methods and signal processing. The measurements indicated that both of the filters work and do filter unwanted noise, differences can be seen in the overall noise level. There are however some ideas outlined in this thesis that potentially could help increase the noise suppression of the filters.