The purpose of this project is to analyze the influence of connecting an LC-filter to a drive system and investigate whether it is possible to use simpler control designs to stabilize the system as an alternative to the standard 4-level cascade control. By applying the Field Oriented Control (FOC) method three control design options are presented and it is investigated if the simpler Option 2 is viable as control of the LC-filter connected drive system. In order to stabilize the control system as a result of the produced resonance from the connected LC-filter an Full-Order-Observer is needed to estimate the non-measured stator currents and filter out the resonance. The Full-Order-Observer design method is introduced with the partially purpose to estimate the internal states based on the measured inverter currents. To verify these methods the control systems are implemented in a dSPACE laboratory setup running a DSP platform with MATLAB/Simulink interface. Various scenarios producing experimental data is then tested throughout the chapters for ongoing validation.