Patent ID: 8581460

Claim:
An armature for a rotating electrical machine, including an armature core formed by disposing in a distributed fashion a plurality of slots extending in an axial direction of a cylindrical core reference surface in a circumferential direction of the core reference surface and a coil formed by joining a plurality of segment conductors and wound around the armature core, wherein the segment conductor includes a conductor edge portion disposed along the axial direction within the slot, and a joint extension portion that extends in the axial direction relative to the armature core from at least one end portion of the conductor edge portion, the coil has an n-layer winding structure in which n (where n is an integer of two or more) of the conductor edge portions are arranged in a radial direction within each slot, and includes an inter-layer joint portion on an axial direction outer side of the armature core, the inter-layer joint portion being formed by joining together a first layer side joint extension portion and a second layer side joint extension portion, which are joint extension portions extending from conductor edge portions that are disposed respectively in different slots so as to form adjacent layers to each other, and at least one of the first layer side joint extension portion and the second layer side joint extension portion forming a pair to be joined by the inter-layer joint portion includes an offset bend portion for offsetting the corresponding joint extension portion in the radial direction toward a side approaching the other joint extension portion of the pair, and the first layer side joint extension portion and the second layer side joint extension portion are joined such that respective joint surfaces thereof oppose each other in a circumferential direction.