Rotating electric machine and method for manufacturing rotating electric machine

A method of manufacturing a rotating electric machine including a plurality of rectangular wire segment coils and a stator core having a slot that houses the plurality of rectangular wire segment coils,

• wherein the slot has a plurality of layers disposed in a radial direction of the rotating electric machine,
• the method comprising:
• each of the plurality of rectangular wire segment coils having an insertion portion disposed in the slot, and
• forming a first region portion linearly along an axial direction of the rotating electric machine and forming a second region portion connected to the first region portion and along a circumferential direction including a bent portion in the circumferential direction of the stator core,
• wherein the second region portion includes a third region portion in which a coil width decreases along a direction away from the stator core in the axial direction of the rotating electric machine,
• wherein a pair of the rectangular wire segment coils adjacent to each other at coil ends of the plurality of rectangular wire segment coils includes a conductive portion to which the first region portion of one of the rectangular wire segment coils and the second region portion of the other of the rectangular wire segment coils are connected,
• wherein in the conductive portion, the second region portion has a conductive portion cross-section disposed on a same plane as an end portion cross-section of the first region portion, and the conductive portion cross-section is a cross-section in a direction different from a direction of a coil vertical cross-section of the second region portion, and
• wherein each of the plurality of layers includes a first layer in which the first region portion appears at an axial end portion and a second layer in which the second region portion appears at an axial end portion when the coil end is viewed in an axial direction of the rotating electric machine.