Electric motor, compressor, air blower, and refrigerating and air conditioning apparatus

An electric motor comprising:

• a stator;
• and
• a rotor including a shaft, a first rotor core fixed on a first side of the shaft in an axial direction, and a second rotor core fixed on a second side of the shaft, the second side being opposite to the first side in the axial direction, the rotor being disposed inside the stator, wherein
• the shaft is supported only on the first side,
• a minimum distance from the first rotor core to the stator in a radial direction is shorter than a minimum distance from the second rotor core to the stator in the radial direction,
• a maximum radius of the first rotor core is longer than a maximum radius of the second rotor core,
• the first rotor core includes a first hole and a first thin-wall part, the first thin-wall part being located outside the first hole in the radial direction and being a region between an end of the first hole in a longitudinal direction of the first hole and an outer edge of the first rotor core,
• the second rotor core includes a second hole and a second thin-wall part, the second thin-wall part being located outside the second hole in the radial direction and being a region between an end of the second hole in a longitudinal direction of the second hole and an outer edge of the second rotor core,
• a shape of the first thin-wall part and a shape of the second thin-wall part are the same in a plane perpendicular to the axial direction, and
• the first thin-wall part and the second thin-wall part overlap each other in the axial direction.