Honda Motor Co., Ltd.
Rotor of rotating electrical machine

Abstract:

A rotor of a rotating electrical machine includes: a rotor core with a plurality of magnet insertion holes; and a plurality of magnetic pole portions including permanent magnets inserted into the plurality of magnet insertion holes. A space portion is provided between a space portion forming surface of at least one of the outer diameter surface and the inner diameter surface of the permanent magnet and a wall surface of the magnet insertion hole facing the space portion forming surface. The space portion includes: a liquid medium storage region provided in a center in the circumferential direction, and liquid medium throttle regions provided at both end portions in the circumferential direction, and a distance between the permanent magnet and the magnet insertion hole in the liquid medium throttle region is shorter than a distance between the permanent magnet and the magnet insertion hole in the liquid medium storage region.