JP2012257390A5 - - Google Patents

Claims (7)

A rotor core formed by laminating a plurality of electromagnetic steel sheets has a plurality of magnet insertion holes penetrating in the axial direction, and the two surfaces where the permanent magnets and the permanent magnets intersect with the lines of magnetic force are exposed in the magnet insertion holes. A rotor of a permanent magnet embedded motor into which a cover made of a non-magnetic material is inserted. A first protrusion that protrudes from one end of the cover in the axial direction and abuts against one end surface of the rotor core in the axial direction, and a protrusion that protrudes from the end of the cover in the other axial direction The rotor of an embedded permanent magnet motor according to claim 1, further comprising a second protrusion that contacts the other end surface of the rotor core. Claim, characterized in that it comprises a recess extending in the axial direction provided in the magnet insertion hole inner wall of the rotor core, and a convex portion extending in the axial direction are press-fitted into the recess provided in the cover 1 Alternatively, the rotor of the permanent magnet embedded motor according to claim 2 . The rotor of an embedded permanent magnet motor according to any one of claims 1 to 3 , wherein a hole is provided in at least one surface of the cover. 5. The rotor of an embedded permanent magnet motor according to claim 1, wherein each permanent magnet has a substantially rectangular cross section. 5. The rotor of an embedded permanent magnet motor according to claim 1, wherein each of the permanent magnets has a substantially bowl shape in cross section. 5. The rotor of a permanent magnet embedded motor according to claim 1, wherein each of the permanent magnets has a substantially roof-shaped cross section.