| 摘要 |
<p>A rotor core (11, 11_11 11_2, 11_3, 11_4) according to an embodiment has a plurality of magnet openings (112, 112_1, 113, 113_1) and cavity portions (111, 111_1, 111_2, 111_3, 111_4, 111_5, 111_6, 111_7). The magnet openings (112, 112_1, 113, 113_1) are in juxtaposition with each other in a circumferential direction. Permanent magnets (12) are inserted in the magnet openings (112, 112_1, 113, 113_1). The cavity portions (111, 111_1, 111_2, 111_3, 111_4, 111_5, 111_6, 111_7) are each formed relative to an area sandwiched between two magnet openings (112, 112_1, 113, 113_1), out of the magnet openings (112, 112_1, 113, 113_1), in which the permanent magnets (12) that are mutually adjacent and that have magnetic pole directions relative to a radial direction opposite to each other are inserted.</p> |
