Rotor, motor, fan, and air conditioner

A rotor having N/2 (N is an even number) magnet magnetic poles and N/2 virtual magnetic poles, the rotor comprising:

• a rotor core having an annular shape about an axis;
• and
• a plurality of permanent magnets attached to the rotor core,
• wherein each of the N/2 magnet magnetic poles is formed by at least one permanent magnet of the plurality of permanent magnets, and each of the N/2 virtual magnetic poles is formed by a part of the rotor core,
• wherein a pole center line of each magnet magnetic pole is defined by a line passing through a center of the magnet magnetic pole in a circumferential direction of the rotor core and the axis,
• wherein the at least one permanent magnet forming the magnet magnetic pole has a first corner facing an outer circumference of the rotor core and located farthest from the pole center line on one side of the pole center line, and a second corner facing the outer circumference and located farthest from the pole center line on the other side of the pole center line, and
• wherein an angle θm between a line passing through the first corner and the axis and a line passing through the second corner and the axis satisfies θm≥360/N [degrees].