Alternating current generator with improved fan system

摘要

In an alternating current generator and fans thereof in accordance with the invention, the cooling efficiency of the alternating current is improved by fans fixed to a rotor. When the fans are formed during a press working operation, the blades are formed directly from the fans by cut-raising the fans toward a bracket side to form blades and simultaneously cut-raising protruding potions toward a rotor side to form protrusions. This design allows for both improvement in cooling efficiency of the alternating current generator and ease of manufacture of the fans.