Interior permanent magnet motor rotor, and a motor having the rotor, and a compressor provided with the electric motor, and an air conditioner having the compressor

摘要

While suppressing the occurrence of partial demagnetization of the permanent magnets, a rotor which can be made further noise reduction of the interior permanent magnet motor and an electric motor using this rotor, and a compressor using the motor, and obtaining the air conditioner using the compressor. Is formed in the axial direction in the vicinity of the magnetic pole end portions between the outer surface and the magnet insertion hole 9 of the rotor core 6, shaped substantially Ha along the outer peripheral surface of the rotor core 6 relative to the center line of each magnetic pole and a slit 14 which forms a symmetrical, the thickness B of the permanent magnet 10 is set to more than double the air gap A (B 2A), the shortest distance between the slit hole 14 and the permanent magnet 10 is the shortest The width C of the magnetic path 15 is set to more than double the air gap A, and the inclination θ of the slit 14 with respect to the width direction of the permanent magnet 10 which is perpendicular to the radial direction in the range of 0~30 °.