Rotor, rotary electric machine, and method of manufacturing the rotary electric machine

A method of manufacturing a rotary electric machine including

• a rotor, which has:
• a main shaft which is an axis of rotation;
• a first resin portion formed by being filled with a resin so as to surround a periphery of the main shaft;
• a first core disposed in close contact with an outer circumferential portion of the first resin portion;
• a magnet attached to a radial outside of the first core;
• and a second core disposed in close contact with a radially outside end face of the magnet, wherein a plurality of structures in each of which the magnet is sandwiched between the first and second cores are disposed circumferentially around the main shaft, and a second resin portion is formed between circumferential end faces of adjacent second cores and between circumferential end faces of adjacent magnets, wherein the first core has, between itself and an adjacent first core, a division surface on which circumferential end faces of itself and the adjacent first core are in surface contact with each other, and wherein the second core is not in contact with an adjacent second core;
• and
• a stator which is disposed radially opposite the rotor, the method comprising:
• a step in which the resin is filled while pushing, from radially inside, a plurality of the first and second cores, which are circumferentially disposed in close contact with the inner diameter of the rotor, and thereby pressing the first and second cores against a die in contact with the outer diameter of the second cores, thus molding the first resin portion and the second resin portions.