ROTOR, MOTOR INCORPORATING ROTOR, COMPRESSOR INCORPORATING MOTOR, REFRIGERATION CYCLE DEVICE INCORPORATING COMPRESSOR, AND AIR CONDITIONER INCORPORATING REFRIGERATION CYCLE DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a rotor which can heighten the restrictive effect of high temperature demagnetization of a permanent magnet embedded in the rotor core.;SOLUTION: The rotor comprises: a rotor core 3 consisting of a plurality of laminated magnetic steel sheets having a plurality of magnet insertion holes 6 opened at equal angle intervals along the periphery in circumferential direction; and a plurality of permanent magnets 5 which are inserted in alternating polarities into the adjacent magnet insertion holes 6 to form magnetic poles. Each of the plurality of magnet insertion holes 6 are formed so that when a permanent magnet 5 is inserted, there will be voids in both edge portions 6a in the circumferential direction of the magnet insertion hole 6. The permanent magnets 5 each have grooves parallel in the axial direction formed therein so that the transverse cross section of edge portions 5a in the circumferential direction exposed to the voids 8 will be jagged like waves, and the grooves are used for a coolant passage in order for the coolant to flow in the voids 8.;COPYRIGHT: (C)2013,JPO&INPIT