Patent ID: 9136747
Filing Date: 2015-09-15
Classification: H02K

Abstract:
1. A hybrid excitation rotating electrical machine, comprising: a rotor having first and second rotor cores that are separated in an axial direction with a gap between the rotor cores, wherein first magnetic poles that are excited by a permanent magnet and second magnetic poles that are not excited by the permanent magnet are alternately arranged in a circumferential direction in each of the first and second rotor cores, the first magnetic poles of the first rotor core have a different polarity from that of the first magnetic poles of the second rotor core, and the first magnetic poles of one of the first and second rotor cores are placed so as to face the second magnetic poles of the other of the first and second rotor cores in the axial direction with the gap between the rotor cores; a stator that is placed radially outward of the rotor with an air gap between the stator and the rotor, and that generates a rotating magnetic field rotating the rotor; and an exciting coil that is fixed to the stator, that is placed in the gap so as to protrude radially inward from the stator, and that excites the second magnetic poles, wherein an axial end of a radially outer end of the first rotor core, which is located on the second rotor core side, and the second rotor core are positioned on opposite sides in the axial direction of an axial end of the exciting coil, which is located on the first rotor core side, and an axial end of a radially outer end of the second rotor core, which is located on the first rotor core side, and the first rotor core are positioned on opposite sides in the axial direction of the axial end of the exciting coil, which is located on the second rotor core side.