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

Abstract:

A rotor of a rotating electrical machine includes a rotor core, a plurality of magnetic pole portions arranged along a circumferential direction, and a plurality of arc magnets constituting the magnetic pole portions. Each magnetic pole portion includes a magnet portion of at least two layers along a radial direction. In front view, the rotor core includes an outer diameter side magnet insertion hole, an inner diameter side magnet insertion hole, and a refrigerant flow path hole provided between an outer diameter side magnet portion and an inner diameter side magnet portion to overlap a d-axis. A minimum width of a magnetic path formed between the outer diameter side magnet insertion hole and the refrigerant flow path hole is equal to or larger than a minimum width of a magnetic path formed between the outer diameter side magnet insertion hole and the inner diameter side magnet insertion hole.