Stator and rotary electric machine

A stator (30) that includes an annular coil assembly (230) around a center axis (CL) of the stator (30), wherein the coil assembly (230) is formed from a plurality of coil forming bodies (230a1 to 230a4), the stator (30) characterized in that:

• each coil forming body (230a1 to 230a4) includes i) a coil region (230A) that is formed in a concavo-convex shape with generally U-shaped portions (232), each having a protruding portion (P), reversing alternately, formed by an insulation-coated conductive wire (21, 21a, 21b, 21c) in which a conductive wire (211) is coated with an insulation coating (212), and that is wound in an annular shape along a circumferential direction, and ii) a plurality of conductive wire exposed regions (230B) that are provided on end portions of the coil region (230A), and in which the conductive wire (211) is exposed, and that are arranged at predetermined intervals along an outer peripheral side on one end side of the coil assembly (230) in a direction in which the center axis (CL) extends;
• the protruding portion (P) has a curved portion (C1) that increases in diameter on an outside in a radial direction, when the coil region (230A) is wound along the circumferential direction;
• between one of the conductive wire exposed regions (230B), from among the conductive wire exposed regions (230B) that are positioned on both sides of one of the curved portions (C1) positioned on an outermost periphery of the coil assembly (230), and the insulation-coated conductive wire (21c) that forms the one curved portion (C1), is positioned the insulation-coated conductive wire (21b) of one of the coil forming bodies (230a2) that is different from another of the coil forming bodies (230a1) that has the insulation-coated conductive wire (21c);
• and
• the insulation-coated conductive wire (21b) of the one coil forming body (230a2) forms another of the curved portions (C1).