Method of manufacturing rotor

A method of manufacturing a rotor, comprising:

• arranging a rotor core in which a plurality of magnet materials are assembled in a magnetic field application region of a magnetization device;
• and
• manufacturing a rotor by performing a magnetizing process, wherein an external magnetic field is generated in the magnetic field application region by the magnetization device in the magnetizing process to magnetize the magnet materials,
• wherein the magnetization device has a coil group that is configured of a plurality of coils for generating a magnetic field by being energized, which are disposed side by side outside the magnetic field application region in a manner that winding directions of adjacent coils are opposite to each other,
• wherein the coil group is configured of sub coils that are located at both ends among the plurality of coils and two or more main coils that have a number of turns higher than the sub coils and are located between the sub coils at both ends,
• wherein the coils in the coil group are all connected in series, and
• wherein a plurality of partial magnetizations are performed in the magnetizing process, one of the coil group and the rotor core is rotationally moved around an axis of the rotor core between the plurality of partial magnetizations to magnetize all the plurality of magnet materials, and in the partial magnetizations, the coil group is energized in a state of arranging the rotor core in the magnetic field application region of the magnetization device to generate an external magnetic field, so as to magnetize the magnet material among the plurality of magnet materials to which magnetic flux interlinking with adjacent main coils both is applied.