Motor assembly and motor rotor

A motor assembly, comprising:

• a motor rotor including:
• a mandrel;
• a carrier disposed on the mandrel, wherein the carrier is made of non-magnetic material, wherein an outer edge of the carrier has a plurality of protrusions that are spaced apart from each other, and a setting groove is formed between any two of the protrusions adjacent to each other, and wherein each of the setting grooves is in a shape of a dovetail;
• a plurality of iron cores respectively fixed on the setting grooves, wherein the iron cores do not contact each other, so that an accommodating space is formed between any two of the iron cores adjacent to each other, wherein each of the iron cores has two opposite ends, and one of two ends of each of the iron cores has a first convex portion that is in a shape of a dovetail, so that each of the iron cores is connected to the corresponding setting groove through the first convex portion thereof, and wherein two opposite sides of another one of the two ends of each the iron cores have a baffle portion, respectively;
• and
• a plurality of magnets respectively disposed in the accommodating spaces, wherein in each of the accommodating spaces, the baffle portions of two corresponding ones of the iron cores adjacent to each other limit the movement of the magnet;
• and
• a motor stator assembled on a peripheral portion of the motor rotor, wherein the motor stator includes:
• a plurality of winding frames each having an installed end and an arranged end that is opposite to the installed end, wherein each of the installed ends has two opposite sides, one side of each of the installed ends has a second convex portion, and the other one side of each of the installed ends has a concave portion that is configured to connect to the second convex portion, wherein in any two of the winding frames adjacent to each other, the second convex portion of one of the two winding frames and the concave portion of another one of the two winding frames are engaged with each other, wherein any two of the arranged ends of the winding frames adjacent to each other are provided with a gap there-between, and the arranged end of each of the winding frames has an end surface facing the motor rotor, wherein the end surface of each of the arranged ends has two semicircular grooves that are spaced apart from each other, and a diameter of each of the two semicircular grooves is equal to a distance of the gap, wherein the two semicircular grooves of each of the end surfaces are provided with a predetermined arc length there-between, and wherein each of the predetermined arc lengths is ⅓ of an arc length of each of the end surfaces, so that the arc length of each of the end surfaces is divided into three equal portions, and
• a plurality of wires wound on the winding frames.