ROTOR FOR ROTARY ELECTRIC MACHINE AND ROTARY ELECTRIC MACHINE

摘要

A rotor (14) includes a shaft having a coolant flow passage and a coolant supply port, a rotor core (24) fixed on the shaft and formed of laminated steel plates, and a magnet set (32) provided in the rotor core (24) to extend along an axial direction thereof. The rotor core (24) has a first flow passage (34) provided near the magnet to extend therealong and a second flow passage (36) that connects the coolant supply port (28) of the shaft (22) and the first flow passage (34), thereby constituting a coolant flow path. The second flow passage (36) is formed by overlapping second slits (37) formed in the respective steel plates at an axially intermediate region A of the rotor core (24), the formed position of the second slit (37) being different for each steel plate combined. The first flow passage (34) and the second flow passage (36) join at the axially intermediate region A of the rotor core (24).