GENERATOR AND POWER GENERATION SYSTEM

PROBLEM TO BE SOLVED: To provide a generator which is capable of sufficiently attaining suppression of cogging without complicating the structure thereof.SOLUTION: A motor 1 comprises: a rotor yoke 4 including a cylindrical hollow portion 5 and grooves towards the hollow portion 5, the grooves being as many as a multiple of 2; a rotor part 2 including rotor-side permanent magnets 6U and 6L, protrusions 8U, 9 and 8L, and a winding wire portion 18 circumferentially wound around the hollow portion 5; and a stator part 3 in which stator members formed from stator yokes 12U and 12L, permanent magnets 15U and 15L opposing permanent magnets 7U and 7L, protrusions 16U, 16U, 16 Land 16 L, and winding wire portions 17U and 17L which are circumferentially wound oppositely to the permanent magnets 15U and 15L at a side opposing the rotor part 2 are included in such a manner that the protrusions 16Uand 16Uand the protrusions 16 Land 16 Lare deviated by a half pitch from each other between axially neighboring stator members.