ELECTRIC MOTOR WITH EMBEDDED PERMANENT MAGNET, COMPRESSOR, AND REFRIGERATING AND AIR CONDITIONING DEVICE

摘要

In this electric motor with an embedded permanent magnet, the hole interior line (53) of a magnet insertion hole (21) is formed from a first circular arc having a radius (r1), a hole exterior line (55) is formed from a second circular arc having a radius (r2), the first circular arc and the second circular arc protrude toward the center of rotation of a rotor, the center (O1) of the first circular arc and the center (O2) of the second circular arc are positioned on a magnetic pole center line (ML), the distance (x1) in the magnetic pole center line (ML) direction between the center (O1) of the first circular arc and a rotation center line (CL) is larger than the distance (x2) in the magnetic pole center line (ML) direction between the center (O2) of the second circular arc and the rotation center line (CL), and the distance (x1) - the distance (x2) > the radius (r1) - the radius (r2).