Honda Motor Co., Ltd.
Rotor

Abstract:

A rotor includes: a rotor core having a rotor shaft hole into which a rotor shaft is tightened and a plurality of magnet insertion holes provided along a circumferential direction; and a plurality of magnetic pole portions constituted by magnets inserted into the magnet insertion holes. The rotor core includes a cooling portion having a plurality of refrigerant flow passage holes provided radially inward of the plurality of magnetic pole portions and arranged along a circumferential direction, the plurality of refrigerant flow passage holes are arranged on both circumferential end portion sides of each magnetic pole portion, the refrigerant flow passage hole includes an inner radial side apex portion protruding radially inward, and an outer peripheral wall of the refrigerant flow passage hole includes an outer radial side apex portion protruding radially outward.