Abstract: A cooling fan module for heat dissipation of an automobile engine is provided. The cooling fan module includes a fan assembly and a brush motor for driving the fan assembly. The brush motor includes a stator having a housing and a plurality of permanent magnets fixed onto an inner wall of the housing, and a rotor including a shaft, a rotor core including a plurality of winding slots evenly distributed on a periphery of the rotor core, and a winding wound around the rotor core. The number of the permanent magnets is four, and the number of the winding slots is twenty-two, to make the brush motor have a small noise, and a long life.

Abstract: A DC motor, has a stator housing accommodating a permanent magnet stator; a rotor, rotatably mounted confronting the stator, the rotor having a shaft, a rotor core fitted to the shaft and having asymmetric laminations, a commutator fitted to the shaft adjacent one end of the rotor core, and windings wound about poles of the rotor core and terminated on the commutator; and brush gear comprising brushes in sliding contact with the commutator for transferring electrical power to the windings, wherein the cogging torque order for the motor is greater than twenty. Preferably, the cogging torque order is 28, 36 or 44.

Abstract: A DC motor, has a stator housing accommodating a permanent magnet stator; a rotor, rotatably mounted confronting the stator, the rotor having a shaft, a rotor core fitted to the shaft and having asymmetric laminations, a commutator fitted to the shaft adjacent one end of the rotor core, and windings wound about poles of the rotor core and terminated on the commutator; and brush gear comprising brushes in sliding contact with the commutator for transferring electrical power to the windings, wherein the cogging torque order for the motor is greater than twenty. Preferably, the cogging torque order is 28, 36 or 44.