Patent ID: 7420314

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 rotor; 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 first and second 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, said alternating-current dynamoelectric machine being characterized in that a magnetic body is permanently disposed between a pair of said first and second permanent magnets, and rectangular in shape.