Rotor for rotary electric machine

A rotor for a rotary electric machine, comprising:

• a rotor core being rotatable around a rotational axis, the rotor core including a plurality of steel plates stacked in a stacking direction parallel to the rotational axis and having a plurality of magnet insertion holes at every first circumferential space, each of the plurality of steel plates comprising:
• a plurality of magnet insertion piece holes provided at every said first circumferential space, the plurality of magnet insertion piece holes constituting the plurality of magnet insertion holes in a state in which the plurality of steel plates are stacked in the stacking direction while the rotor core includes a first core in which a predetermined number of the plurality of steel plates are stacked in a predetermined direction, and a second core in which a predetermined number of the plurality of steel plates are stacked in a direction opposite to the predetermined direction of the first core;
• a plurality of through piece holes penetrating each of the plurality of steel plates at every second circumferential space in the stacking direction on a radially inner side of the plurality of magnet insertion piece holes;
• a radially inner side annular ring provided on a radially inner side of the plurality of through piece holes;
• a radially outer side annular ring provided on a radially outer side of the plurality of through piece holes;
• and
• a plurality of ribs provided between the plurality of through piece holes and connecting the radially inner side annular ring and the radially outer side annular ring, the plurality of ribs being provided to extend in one of circumferential directions as the plurality of ribs come closer to a radially outer side.

A rotor for a rotary electric machine, comprising:

• a rotor core being rotatable around a rotational axis, the rotor core including a plurality of steel plates stacked in a stacking direction parallel to the rotational axis and having a plurality of magnet insertion holes at every first circumferential space, each of the plurality of steel plates comprising:
• a plurality of magnet insertion piece holes provided at every said first circumferential space, the plurality of magnet insertion piece holes constituting the plurality of magnet insertion holes in a state in which the plurality of steel plates are stacked in the stacking direction while the plurality of steel plates are rotated by the first circumferential space at every timing at which a predetermined number of the plurality of steel plates are stacked in the stacking direction;
• a plurality of through piece holes penetrating each of the plurality of steel plates at every second circumferential space in the stacking direction on a radially inner side of the plurality of magnet insertion piece holes, the first circumferential space and the second circumferential space being different from each other;
• a radially inner side annular ring provided on a radially inner side of the plurality of through piece holes;
• a radially outer side annular ring provided on a radially outer side of the plurality of through piece holes;
• a plurality of ribs provided between the plurality of through piece holes and connecting the radially inner side annular ring and the radially outer side annular ring, the plurality of ribs which are axially adjacent and circumferentially displaced when viewed in the stacking direction, and parts of which overlap between a connecting portion with the radially inner side annular ring and a connecting portion with the radially outer side annular ring when viewed in the stacking direction.