TY - JOUR N2 - Permanent magnet (PM) excited synchronous machines used in modern drives for electro-mobiles suffer in high speed regions from the limited battery-voltage. The field weakening requires designing machines with reduced power conversion properties or increasing the size of the power converter. A new concept of such a machine features PM excitation, single-tooth winding and an additional circumferential excitation coil fixed on the stator in the axial center of the machine. By the appropriate feeding of this coil, the amplitude of the voltage effective excitation field can be varied from zero to values above those of the conventional PM-machines. The capability of reducing the excitation field to zero is an important safety aspect in case of failing of the feeding convertor. L1 - http://journals.pan.pl/Content/84600/PDF/11_paper.pdf L2 - http://journals.pan.pl/Content/84600 PY - 2011 IS - No 4 December EP - 540 DO - 10.2478/v10171-011-0043-2 KW - electric vehicles KW - permanent magnet KW - synchronous machines KW - field weakening KW - optimal feeding A1 - May, H. A1 - Palka, R. A1 - Paplicki, P. A1 - Szkolny, S. A1 - Canders, W.-R. PB - Polish Academy of Sciences VL - vol. 60 DA - 2011 T1 - Modified concept of permanent magnet excited synchronous machines with improved high-speed features SP - 531 UR - http://journals.pan.pl/dlibra/publication/edition/84600 T2 - Archives of Electrical Engineering ER -