Systems and methods for cooling electronics and a rear end of stator windings in an alternator

A method comprising:

• rotating a dual-sided fan disposed within a housing of an alternator, the housing have a drive end, a rear end, and sides, the dual-sided fan mounted to a rotor assembly toward the rear end of the housing, the dual-sided fan comprising a drive end blade set and a rear end blade set on opposite sides of a separating wall;
• drawing, by the rear end blade set of the dual-sided fan, a first air flow through a rear end air inlet at the rear end of the housing;
• pulling, by the rear end blade set, the first air flow over electronics to transfer heat from the electronics to the first air flow;
• expelling, by the rear end blade set, the first air flow out the sides of the housing at a first rear end fan air outlet;
• drawing, by the drive end blade set of the dual-sided fan, a second air flow through a drive end air inlet at the drive end of the housing;
• blowing, by the drive end blade set, the second air flow over rear end stator windings of a stator assembly to transfer heat from the rear end stator windings of the stator assembly to the second air flow;
• and
• expelling, by the drive end blade set, the second air flow out the sides of the housing at a second rear end fan air outlet,
• wherein the second rear end fan air outlet is positioned adjacent to the rear end stator windings and the first rear end fan air outlet is positioned between the second rear end fan air outlet and the rear end of the housing.

A dual-sided fan comprising:

• a curved separating wall having a first side and a second side;
• a drive end blade set extending from the first side of the curved separating wall, the drive end blade set comprising an outer portion and an inner portion;
• and
• a rear end blade set extending from the second side of the curved separating wall.