| 摘要 |
An electric motor (1) has a supplementary field magnet (SF) including a supplementary magnet (51), a yoke (52) serving as a magnetic path for magnetic flux produced by the supplementary magnet (51). The supplementary field magnet (SF) is arranged on one axial end side of the rotor (4) with a gap. A rotor core (22) is provided with first projections (37) projecting toward one axial end side of the electric motor (1) from first magnetic pole portions (35) having a first polarity, and second projections (38) projecting toward the one axial end side from second magnetic pole portions (36) having a second polarity, and arranged radially inward of the first projections (37). The yoke (52) includes a magnetic pole portion (54) axially opposed to the first projections (37) and having the first polarity, and another magnetic pole portion (55) axially opposed to the second projections (38) and having the second polarity such that a gap (G) is formed between the magnetic pole portions (54, 55). |
