Patent attributes
A cooling structure of a rotating electrical machine including a stator and a rotor, the cooling structure including magnet accommodating holes provided in a rotor core of the rotor, the magnet accommodating holes extend between axial core end faces of the rotor core, wherein permanent magnets are accommodated in the magnet accommodating holes; a plurality of voids, which prevent leakage flux, in contact with the permanent magnets and extending between the axial core end faces; and a rotor cooling-liquid supply passage that supplies cooling liquid to one core end face, wherein the cooling liquid supplied from the rotor cooling-liquid supply passage is introduced into the voids to prevent leakage flux, and the permanent magnets are cooled by the cooling liquid flowing through the voids.
