Patent ID: 7786642

Claim:
A rotating machinery comprising: a rotor; a stator core provided with a plurality of slots extending in an axial direction in an inner circumferential portion; at least two armature windings, wherein each of the two armature windings is constituted by a plurality of strands within one of said plurality of slots; wherein each of said two armature windings comprises two sub windings separating said two armature windings into two layers in a vertical direction, and said sub windings are connected as to form a parallel circuit, and wherein said two armature windings construct the parallel circuit of said sub windings existing in said plurality of slots, wherein the rotating machinery further comprises: an armature winding positive connection portion having a connector connecting an end region of a sub winding on an inner diameter side of an inner diameter side armature winding and an end region of a sub winding on an inner diameter side of an outer diameter side armature winding, and a connector connecting an end region of a sub winding on an outer diameter side of the inner diameter side armature winding and an end region of a sub winding on an outer diameter side of the outer diameter side armature winding; and an armature winding negative connection portion having a connector connecting the end region of the sub winding on the inner diameter side of the inner diameter side armature winding and the end region of the sub winding on the outer diameter side of the outer diameter side armature winding, and a connector connecting the end region of the sub winding on the outer diameter side of the inner diameter side armature winding and the end region of the sub winding on the inner diameter side of the outer diameter side armature winding; wherein said parallel circuit is constructed by said positive connection portion and said negative connection portion in the armature windings.