Patent ID: 8736131

Claim:
A dynamoelectric machine comprising a stator that includes: a stator core; and an armature winding that is mounted to said stator core, said dynamoelectric machine comprising: a delta-connected three-phase winding configured by delta-connecting respective phase windings of one of said three-phase windings; and a wye-connected three-phase winding configured by connecting respective phase windings of a remainder of said three-phase windings in series to respective output ends of said delta-connected three-phase winding; wherein said plurality of three-phase windings are each installed in said stator core such that respective phase currents have a phase difference from each other, angles between center lines of adjacent slot opening portions of said stator core have a nonuniform pitch, a turn ratio between said delta-connected three-phase winding and said wye-connected three-phase winding is within a range of 1.25 to 2.25, and electrical conductors that are loaded inside slots are equal in number in each and every slot.