Patent ID: 7893594

Claim:
An alternating-current dynamoelectric machine comprising: a stator including: a stator core in which slots that extend in an axial direction are formed on an inner side; and a stator winding that is mounted to said stator core by winding conducting wires into said slots; and a rotatable rotor including: a field winding that is disposed inside said stator; a rotor core constituted by a first pole core and a second pole core that each have claw-shaped magnetic poles that are disposed so as to cover said field winding and that alternately intermesh with each other; and permanent magnets that are respectively disposed on two facing side surfaces of adjacent claw-shaped magnetic poles and that have magnetic fields that are oriented so as to reduce leakage of magnetic flux between said claw-shaped magnetic poles, wherein said permanent magnets that are disposed on first and second circumferential sides of a claw-shaped magnetic pole are held by a holding member that has an angular C-shaped cross section that surrounds said claw-shaped magnetic pole and has a magnetic body, wherein a first side surface of a respective permanent magnet abuts a respective magnetic pole and a second side surface of the permanent magnet abuts the holding member, and wherein the permanent magnet is fully exposed when viewed from an outside in a radial direction.