Rotor of rotating electrical machine

Abstract

The present disclosure provides a rotor of a rotating electrical machine, including: a plurality of refrigerant holes formed in a shaft at intervals in a circumferential direction so as to communicate with a shaft center hole, respectively; a plurality of refrigerant passages formed in the rotor core at intervals in the circumferential direction so as to extend in the axial direction on the outside in the radial direction of the core center hole; a plurality of communication paths formed in the rotor core at intervals in the circumferential direction so as to communicate with the corresponding refrigerant holes and to communicate with the corresponding refrigerant paths at two different locations in the axial direction; and a plurality of stress relaxation grooves formed in the rotor core at intervals in the circumferential direction so as to surround the core center hole on the inside in the radial direction of the plurality of refrigerant passages without interfering with the plurality of communication passages.

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