Patent ID: 8362668

Claim:
A rotor for a rotating an electrical machine, comprising: a plurality of rotor cores each formed by laminating plural steel plates, the plurality of rotor cores being arranged in a rotation axis direction and being spaced from each other, to constitute the rotor; a plurality of permanent magnets axially divided by the rotor cores and circumferentially arranged on each of the rotor cores, to circumferentially form magnetic irregularities; and a rotor blank arranged in a space formed between those of the rotor cores that are adjacent to each other in the rotation axis direction; the permanent magnets being circumferentially shifted from rotor core to adjacent rotor core by a predetermined angle, to form a skew structure; the rotor blank including permanent magnet holes at positions where the permanent magnets adjoin each other to form the skew structure in the rotation axis direction; and the permanent magnet holes being formed so that each hole permits both end faces of the permanent magnets to partly get in contact with each other therein and to form a gap where the ends of the permanent magnets are not present.