Patent ID: 6963154

Claim:
A permanent magnet type electric rotating machine comprising: a stator which includes a stator iron core having a plurality of slots and a three-phase stator winding wound concentrically around salient-poles of said stator iron core, which salient poles are formed between said plurality of slots; and a rotor provided at said stator, with a rotational gap so as to be rotatable, said rotor including a rotor iron core within which a plurality of magnet housing portions are formed in a circumferential direction thereof and permanent magnets housed within said plurality of magnet housing portions, such that magnetic poles of said permanent magnets differ alternately; wherein a ratio between a number of magnetic poles of said rotor and a number of said slots of said stator is 2:3; and when a slot pitch of said stator is formed at an electrical angle τs, an electrical angle θ formed by a circumferential extent of said permanent magnet in a surface of the stator about an axis of said rotor is set at θ≈n×τs/2+8×m (n=1 or 2, and m=1, 2 or 3).