Rotating armature, rotating electric machine comprising a plurality of coil portions, and rotating armature manufacturing method

A rotating armature manufacturing method for a rotating armature including

• an armature core including a plurality of teeth disposed at uniform angle intervals,
• a commutator that is disposed coaxially to the armature core and that includes a plurality of segments arranged around a circumferential direction, and
• a plurality of coil portions that are each wound a plurality of times straddling a set of three teeth out of the plurality of teeth, three layers of coil portions being formed at the same set of three teeth such that a sum of a number of turns in a first layer, a number of turns in a second layer and a number of turns in a third layer equals a total number of turns of the coil portions wound onto the same set of three teeth, and a set of teeth on which each of the plurality of coil portions is wound being sequentially shifted in slot one by one along the circumferential direction, wherein,
• a number of slots between the plurality of teeth is m×n, when m is the number of a plurality of magnetic poles provided at a periphery of the armature core, and n is a natural number,
• the plurality of coil portions are configured by a plurality of first coil portions formed in a first winding having same electric current flow direction, and a plurality of second coil portions formed in a second winding having same electric current flow direction, the first winding being distinct from and not connected to the second winding;
• and
• the first coil portions and the second coil portions are disposed alternately around the circumferential direction of the armature core with respective ends of thereof being disposed adjacent to each other, the adjacently disposed respective ends of the first coil portion and the second coil portion being inserted in the same slot, and
• the rotating armature manufacturing method comprises:
• forming a plurality of individual coil portions such that, in a plurality of windings that form the plurality of coil portions, a plurality of individual coil portions that, out of the plurality of coil portions, are disposed at uniform intervals around the circumferential direction of the armature core and are connected together in series are formed in each of the windings;
• and
• connecting each of the windings including the plurality of individual coil portions such that one segment out of the plurality of segments is connected to another segment that has the same phase as the one segment out of the plurality of segments.