Electric motor, compressor, air blower, and air conditioner

An electric motor comprising:

• a stator;
• and
• a rotor disposed inside the stator, including a permanent magnet and an electromagnetic steel sheet, and having a plurality of magnetic poles, wherein
• the electromagnetic steel sheet includes
• a magnet insertion hole in which the permanent magnet is inserted,
• a first outer peripheral surface including an inter-pole part located at a position between two adjacent magnetic poles of the plurality of magnetic poles,
• a second outer peripheral surface adjacent to the first outer peripheral surface and including a magnetic pole center part located at a center of the permanent magnet, and
• a first slit formed outside the magnet insertion hole in a radial direction of the rotor, the first slit being elongated in a circumferential direction of the rotor,
• a minimum distance from the first outer peripheral surface to the stator is larger than a minimum distance from the second outer peripheral surface to the stator,
• the electric motor satisfies θa<θb
• where θa is a first angle formed, on a first plane that is a plane perpendicular to an axial direction, by a first line from a boundary between the first outer peripheral surface and the second outer peripheral surface to a rotation center of the rotor on the first plane and a second line passing through the inter-pole part of the rotor and the rotation center, and
• θb is a second angle formed, on the first plane, by the second line and a third line passing through the rotation center and an end portion of the first slit on a magnetic pole center side in the circumferential direction.