| 摘要 |
<p>The purpose of the present invention is to provide a rotor capable of reduction in the size and weight and reducing the noise of a permanent magnet embedded motor while minimizing the rise in cost therefor, and to provide a motor using the rotor, a compressor using the motor, and an air conditioner using the compressor. The rotor is provided with: a rotor core (6) formed by laminating a plurality of electromagnetic steel plates; a magnet insertion hole (9) which is individually formed for each magnetic pole in the axial direction of the rotor core (6) and has a convex shape toward the center axis of the rotor core (6); a plurality of slits (12) symmetrically formed along the outer peripheral surface of the rotor core (6) with reference to the center line of the magnetic pole; a first permanent magnet (10) inserted into the center of the magnet insertion hole (9) in the circumferential direction individually for each magnetic pole; and two second permanent magnets (11) for each magnetic pole which have lower residual magnetic flux density than the first permanent magnet (10), are inserted into both ends of the magnet insertion hole (9) in the circumferential direction so as to sandwich the first permanent magnet (10), and thereby form a magnetic pole in combination with the first permanent magnet (10).</p> |
