Patent ID: 9083225
Filing Date: 2015-07-14
Classification: H02K

Abstract:
1. A rotary electric machine comprising: a rotor core fixed to a rotary shaft, which includes a magnetic body that forms a magnetic path, wherein the rotor core includes magnetic salient poles; a stator including teeth and stator windings respectively wound around the teeth by concentrated winding, wherein each of the stator windings has two winding ends, and a slot is formed between adjacent ones of the teeth in a circumferential direction; a field yoke that magnetically connects the stator and the magnetic body; and a field winding located in proximity to at least one of the winding ends of the stator winding in an axial direction of the rotary shaft, wherein: the field winding generates a magnetic pole on the magnetic salient poles when energized, the stator is cylindrical and arranged outward in a radial direction from the rotor core, the field yoke is arranged around the stator, the magnetic salient poles and the teeth are arranged rotationally symmetrical about an axis of the rotary shaft, the stator winding has a phase arrangement set rotationally symmetric about the axis of the rotary shaft, the stator winding is excited by a three-phase alternating current, when Pn represents the number of the magnetic salient poles and Ps represents the number of the slots, Pn and Ps have a common divisor that is a value other than 1, and the number of the magnetic salient poles Pn and the number of the slots Ps are set so that Pn:Ps satisfies 4:9 or 5:12.