Patent ID: 6157111
Filing Date: 2000-12-05
Classification: H02K

Abstract:
A rotor for a dynamo-electric machine, said rotor comprising:a rotor coil through which current flows to generate magnetic flux;a field core assembly which covers said rotor coil and which is composed of a first field core member and a second field core member which respectively have triangular magnetic poles alternately meshed with each other; andan inter-magnetic-pole member provided between adjacent ones of said triangular magnetic poles and which has been magnetized in a direction so as to reduce the leakage of magnetic flux between said triangular magnetic poles;wherein said triangular magnetic pole is constructed by laminating thin steel plates to reduce core loss; andwherein said inter-magnetic-pole member (51) comprises a plurality of zig-zag oriented magnetic portions (52) composed of a magnetic material and surrounded by a molded resin nonmagnetic material (53) which covers said magnetic portions and interconnects them in a circular configuration.