COOLING STRUCTURE OF ROTOR FOR ROTARY ELECTRIC MACHINE AND ROTARY ELECTRIC MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a cooling structure of a rotor for a rotary electric machine that prevents entry of a cooling liquid from coolant passages inside a rotor core into between magnetic steel sheets and reduces drag loss.SOLUTION: A cooling structure of a rotor for a rotary electric machine includes: a rotatable shaft 22 that supplies a cooling liquid flowing therein, to the outside; coolant passages 34 that are fixedly fitted onto the shaft 22 and allow the cooling liquid supplied from the shaft 22 to flow in an axial direction of the rotary electric machine; and a rotor core 20 that has a plurality of magnetic plates laminated in the axial direction of the rotary electric machine. A nonmagnetic member 36 that is impervious to the cooling liquid is provided in a portion of the rotor core 20 close to a radially outer portion, with respect to a radial direction of the rotor core 20, of an inner circumferential surface of each coolant passage 34.