Patent ID: 7135803

Claim:
A dynamoelectric rotor comprising: a rotor coil for generating a magnetic flux; a first pole core body and a second pole core body disposed so as to face each other, respectively having: first and second cylindrical portions on which said rotor coil is installed; first and second disk portions extending radially outward from first and second end portions of said first and second cylindrical portions; and a plurality of first and second claw-shaped magnetic poles extending axially inward from said first and second disk portions so as to alternately intermesh with each other, said first and second claw-shaped magnetic poles covering said rotor coil and being magnetized into North-seeking (N) poles and South-seeking (S) poles by said magnetic flux; and permanent magnets disposed between adjacent pairs of said first and second claw-shaped magnetic poles, said permanent magnets reducing magnetic leakage flux between said adjacent claw-shaped magnetic poles, flange portions projecting in a circumferential direction and restricting radial movement of said permanent magnets due to centrifugal force being formed on first and second side surfaces of said claw-shaped magnetic poles, and tip portion regions of said first claw-shaped magnetic poles of said first pole core body and tip portion regions of said second claw-shaped magnetic poles of said second pole core body being displaced radially outward relative to respective root portions due to said centrifugal force, wherein said dynamoelectric rotor further comprises: a displacement increasing means for making said first claw-shaped magnetic poles of said first pole core body radially displace more than said second claw-shaped magnetic poles of said second pole core body.