ROTOR FOR PERMANENT MAGNET IMPLANTED-TYPE MOTOR, AS WELL AS COMPRESSOR, BLOWER, AND COOLING/AIR CONDITIONING DEVICE USING SAME

摘要

To provide a rotor of a permanent-magnet embedded motor that can reduce torque ripple of the permanent-magnet embedded motor and further increase a magnetic force, and a compressor, a blower, and a refrigerating/air conditioning device using the rotor. A plurality of divided outer peripheral faces 10 are formed by dividing an outer peripheral face of a rotor core 2 in a circumferential direction with an equal angular interval corresponding to a permanent magnet 3. Each of the divided outer peripheral faces 10 is formed by a first curved surface 11 formed from a circumferential center toward a circumferential end of the divided outer peripheral face 10, with a radial distance from a shaft center of the rotor core 2 being largest at the circumferential center of the divided outer peripheral face 10 and a second curved surface 12 formed from the circumferential end toward the circumferential center of the divided outer peripheral face 10 to intersect with the first curved surface 11, with the radial distance from the shaft center of the rotor core 2 being smallest at the circumferential end of the divided outer peripheral face 10. A distance between opposite ends of the first curved surface 11 is smaller than a width of the permanent magnet 3 in a direction orthogonal to a radial direction, and larger than a distance between ends on a circumferential center side of the divided outer peripheral face 10 of air gaps 9 formed at opposite ends of a magnet insertion hole 7.