Permanent magnet direct current motor and cooling fan module

A permanent magnet direct current motor comprising:

• a stator having 2P magnetic poles, where P is an integer greater than one;
• and
• a rotor rotatably mounted to the stator, the rotor comprising a rotary shaft, a rotary core fixed to the rotary shaft, a commutator, and a winding, the rotor core comprising m×P pole teeth, where m is an odd number greater than one, the commutator comprising k×m×P commutator segments, k being equal to 1 or 2, adjacent pole teeth defining therebetween winding slots for receiving the winding;
• wherein the winding comprises a plurality of winding units each having P coils directly connected in series, the P coils are respectively wound around P pole teeth having the same phase, each of two ends of each winding unit comprises a lead-out line, the lead-out line extends from the winding unit in the winding slot and is directly connected to a commutator segment of the commutator, any two lead-out lines extending out of different winding slots are spaced from each other at locations outside the commutator segments.