ROTATING ELECTRIC MACHINE AND SHAFT FOR ROTATING ELECTRIC MACHINE

摘要

A rotating electric machine having a rotating shaft with a rotor and a hollow path axially extending in the shaft, where the rotor is cooled by allowing refrigerant pass through the path. A refrigerant inlet tube made up of circular tube groups is fixed in an intimately contacting manner to the inner peripheral surface of that portion of the hollow path in the shaft which corresponds to the rotor.