CPC H02K 1/04 (2013.01) [H02K 1/18 (2013.01); H02K 1/27 (2013.01); H02K 5/08 (2013.01)] | 18 Claims |
1. A motor comprising:
an annular stator core having a plurality of core segments connected via connecting portions in a circumferential direction about an axis;
a cover portion covering the stator core and having a core-surrounding portion surrounding the stator core from an outer side in a radial direction about the axis and a core-adjacent portion projecting from the stator core in a direction of the axis; and
a rotor having a rotor core provided on an inner side of the stator core in the radial direction and a magnet attached to the rotor core, the magnet forming a first magnetic pole, and a part of the rotor core forming a second magnetic pole,
wherein a minimum distance R1 in the radial direction from the axis to an outer circumference of the core-surrounding portion and a minimum distance R2 in the radial direction from the axis to an outer circumference of the stator core satisfy:
R1≥1.15×R2,
wherein the core-surrounding portion and the core-adjacent portion are formed of materials having different mechanical property,
wherein the core-surrounding portion has a higher strength than the core-adjacent portion, and
wherein a minimum thickness T1 of the core-surrounding portion in the radial direction is thicker than a minimum thickness T2 of the core-adjacent portion in the radial direction.
|