1. Helmholtz Institute Münster (HI MS), IEK-12, Forschungszentrum Jülich GmbH, Campus-Boulevard 89, 52074 Aachen, Germany
2. Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Campus-Boulevard 89, 52074 Aachen, Germany
3. JARA-Energy, 52425 Jülich, Germany