Rotor and method for manufacturing rotor

A method for manufacturing a rotor, the rotor including:

• an annular magnet portion including permanent magnets arranged in a circumferential direction having an annular shape;
• and
• a scattering prevention member covering an entire circumference of an outer peripheral surface of the annular magnet portion,
• the method comprising
• winding a sheet material spirally on a winding range, the winding range including at least the entire circumference of the outer peripheral surface of the annular magnet portion, the sheet material being made of a fiber-reinforced resin material in which a fiber bundle is solidified with a resin base material, wherein
• the winding of the sheet material includes:
• forming layers formed of a single continuous portion of the sheet material and laminated with each other in a radial direction, each of the layers being a portion of the sheet material spirally wound on the winding range around an axis of the rotor;
• and
• forming a transition portion being a part of the single continuous portion of the sheet material positioned between ones of the layers adjacent to each other, and
• the transition portion is located at an end portion of the winding range facing i an axial direction and includes a straight portion extending straight in an imaginary plane perpendicular to the axis.