Brush motor and cooling module using the same

A brush motor comprising:

• a stator comprising 2P stator poles, wherein P is an integer greater than 1;
• and
• a rotor comprising a rotary shaft, and a rotor core and a commutator fixed to the rotary shaft, the commutator comprising an insulating base and a plurality of commutator segments fixed to the insulating base,
• wherein the rotor comprises m teeth, wherein m is an integer greater than 2P less than 4P, and 2m is an integral multiple of P;
• wherein the rotor comprises a rotor winding, which is a concentrated winding having m first winding elements and m second winding elements, and each tooth is wound with one of the first winding elements and one of the second winding elements;
• wherein each of the first winding elements is directly connected to no more than one of the corresponding commutator segments, the m first winding elements form a plurality of element groups, each element group having n first winding elements connected in series without any one of the commutator segments connected between any two of the first winding elements in the corresponding element group, each element group being connected only to corresponding commutator segments at both ends thereof, where n is greater than or equal to 2 and less than or equal to P;
• and
• wherein both ends of each second winding element are directly connected to corresponding commutator segments.