Patent ID: 9236775
Filing Date: 2016-01-12
CPC Classification: H02K

Claim Text:
1. A rotary electric machine, comprising: a stator including a multi-phase stator winding that is held in a plurality of slots formed in the stator; and a rotor located in a rotatable manner relative to the stator via a gap, the rotor including an iron core and at least one magnet section embedded in the iron core so as to face the slots, wherein: the magnet section includes a plurality of axially laminated magnets; and when: a slot factor is expressed by S which is a ratio of the slots relative to the magnet section; a slot pitch is expressed by α (deg) which is an angle between the slots, an arc ratio is expressed by θa (deg) which is a relative angle between two line segments of which: i) one connects one of two circumferential end points on a radial end side in a plurality of magnet portions included in the magnet section and a shaft center of the rotor and the stator; and ii) the other connects the other of the two circumferential end points and the shaft center, and a skew angle is expressed by θs (deg) which is an angle of a positional difference between the magnets, the skew angle is set so as to satisfy the following expressions: θs=kα/2 where k is a coefficient; and k=S where θa lies in range of 2.2Sα≦θa≦2.4Sα.