Patent ID: 8912694

Claim:
A rotating electrical machine comprising: a rotor rotatable around a rotation axis; a stator arranged to face the rotor; and a frame which accommodates the rotor and the stator, the frame comprising: a sidewall that surrounds an outer circumference of the rotor and the stator; a projecting portion in which an inlet and an outlet for a refrigerant are formed and which is provided on one end portion of the side wall in a rotation axis direction to project from the sidewall; a refrigerant flow path that is formed in the sidewall, the refrigerant flow path comprising: first flow paths that extend in directions parallel to the rotation axis of the rotor; and second flow paths that connect one ends of the adjacent first flow paths, the second flow paths extending in a circumferential direction about the rotation axis; and through holes that are formed on one other end portion of the sidewall in the rotation axis direction to align at a predetermined pitch over a whole circumference of the sidewall to penetrate from the respective second flow paths to an outer periphery of the sidewall and that are covered by respective lid members, wherein the refrigerant flow path has a serpentine flow path that is formed by the first and second flow paths, wherein the one end portion of the sidewalls is opposite to the one other end portion of the sidewall in the rotation axis direction, and wherein the inlet and outlet of the projecting portion are arranged in the circumferential direction.