1. Research Group for Numerical Analysis and Mathematical Modelling, Department of Mathematical Analysis, Galglaan 2, 9000 Gent, Belgium
2. Department of Electrical Energy, Systems and Automation, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Gent, Belgium
3. Department of Electrotechnology, Faculty of Applied Engineering Sciences, University College Ghent, Schoonmeersstraat 52, 9000 Gent, Belgium