1. University of Zielona Góra, University of Twente,Zielona Góra,Poland
2. Institute of Automatic Control, Electronics and Electrical Engineering, University of Zielona Góra,Zielona Góra,Poland
3. Institute of Automatic Control, Electronics and Electrical Engineering University of Zielona Gora,Zielona Gora,Poland
4. University of Twente, University of Zielona Góra,Enschede,The Netherlands
5. University of Twente,Department of Power Electronics and Electromagnetic Compatibility,Enschede,The Netherlands