Motor

A motor having a stator assembly, a rotor assembly having a rotary shaft, a bearing unit that rotatably supports the rotary shaft with respect to the stator assembly, and a case body that generally houses the stator assembly and the rotor assembly, wherein the case body comprises:

• a bottom surface section;
• a recessed concave section that is located inside the bottom surface section in a radial direction and concaves inwardly in an axial direction at an area opposing an excitation coil of the stator assembly;
• and
• a bearing retaining section that is formed inside the recessed concave section in the radial direction, wherein at least one part of the bearing retaining section is located more interior in the axial direction than the bottom surface section,
• wherein the stator assembly includes a stator core and the excitation coil is wound around the stator core such that the number of turns of the excitation coil becomes greater toward outside in the radial direction, and
• wherein the excitation coil wound around the stator core defines an inclined end surface that concaves in the axial direction, and the recessed concave section of the case body has an inclined surface section that inwardly concaves in the axial direction and extends alone the inclined end surface of the excitation coil wound around the stator core.

A motor, comprising:

• a case body containing a rotor core, wherein the case body comprises:
• a bottom surface section,
• a recessed concave section that is located radially inside the bottom surface section and concaves inwardly in an axial direction at an area opposing an excitation coil provided within the case body, and
• a bearing retaining section that is formed radially inside the recessed concave section, wherein at least a part of the recessed concave section is located more interior in the axial direction than the excitation coil,
• wherein the excitation coil is wound around a stator core such that the number of turns of the excitation coil becomes greater toward outside in the radial direction, and
• wherein the excitation coil wound around the stator core defines an inclined end surface that concaves in the axial direction, and the recessed concave section of the case body has an inclined surface section that inwardly concaves in the axial direction and extends along the inclined end surface of the excitation coil wound around the stator core.