Coil assembly of slotless motor, housing and slotless motor including the same

A coil assembly housing of a slotless motor comprising:

• a main body;
• and
• a plurality of protrusions formed on one surface of the main body,
• wherein the plurality of protrusions are coupled to a plurality of notches formed by coupling of a plurality of coil structures constituting the coil assembly of the slotless motor, and
• the coil assembly of the slotless motor includes a plurality of first coil structures which have two first coil sides facing each other with a first space interposed therebetween and having a fan-shaped cross section in a width direction and have a first end turn bent in a first direction on at least one end in a longitudinal direction of the two first coil sides and a plurality of second coil structures which have two second coil sides facing each other with a second space interposed therebetween and having a fan-shaped cross section in a width direction and have a second end turn bent in a second direction on at least one end in a longitudinal direction of the two second coil sides, wherein the plurality of first coil structures and the plurality of second coil structures are coupled to each other to form a circular stator winding structure.