Motor, compressor and refrigeration device

A motor comprising:

• a stator;
• and
• a rotor,
• wherein:
• the stator has a central hole and a plurality of stator slots, wherein the stator slots are arranged in an annular array centered on an axis of the central hole;
• the rotor is provided in the central hole, wherein a plurality of rotor slots are provided on the rotor;
• the rotor slots are arranged in an annular array centered on the axis of the central hole, and are close to an edge of the rotor;
• and
• a plane perpendicular to the axis of the central hole is a reference plane, wherein a sum of projected areas of the stator slots on the reference plane is S1, wherein a sum of projected areas of the rotor slots on the reference plane is S2, wherein an outer periphery of the stator projected on the reference plane forms a projected pattern, wherein an area of the projected pattern is S3, wherein S2/S1 is not less than 0.26 and not greater than 0.33, and wherein S1/S3 is not less than 0.10 and not greater than 0.18.