Electric motor with a short-circuit reduction part, compressor, blower, refrigerator

An electric motor comprising:

• a stator;
• a rotor facing the stator in a first direction and configured to be rotatable in a second direction that is orthogonal to the first direction;
• and
• a short-circuit reduction part, wherein
• the rotor includes:
• a plurality of first magnets including a primary magnet and a secondary magnet, wherein the primary magnet has a first magnetic pole on a first surface of the primary magnet facing the stator and a fourth magnetic pole on a second surface of the primary magnet different from the first surface;
• a first member, wherein the first member forms a magnetic path between the fourth magnetic pole of the primary magnet and a magnetic pole of the secondary magnet on a side of the secondary magnet facing away from the stator,
• a second magnet arranged adjacent to the primary magnet and having a second magnetic pole and a third magnetic pole that is different in polarity from the second magnetic pole, and configured to increase a magnetic flux of the first magnetic pole of the primary magnet, and wherein
• the primary magnet is provided on a surface of the rotor that faces the stator,
• the second magnet is in direct contact with the primary magnet in a third direction that is orthogonal to the first direction,
• the short-circuit reduction part is provided at a portion around the second magnet facing the second magnet in parallel with a virtual line connecting the second magnetic pole and the third magnetic pole, to reduce a short-circuit of a magnetic flux between the second magnetic pole and the third magnetic pole,
• the short-circuit reduction part has a magnetic resistance that is higher than that of the first member, and
• wherein a portion of the first member is at least partially surrounded by the short-circuit reduction part.